asphaltnews - sabita.co.za · the asphalt briquette competition mooted way back in 2015 is now...
TRANSCRIPT
asphaltNEWS
Volume 33
Issue 2
August 2019
In this issue
CEO Overview 3
Sabita History continued…… 5
Annual Asphalt Briquette Competition 6-10
Road Funding: Did you know? 12-15 CAPSA Conference and ISAP 16-17
Sabita Manuals 18-20
Society for Asphalt Technology 22-24
Dura-Tech and Asphalt Mix 25-28
Forthcoming Events 29
PG Specification for Bitumen 30-31
Competition Act 32 Sabita Members 33-35
Asphalt News is published by the Southern African Bitumen Association (Sabita),
a non-profit organisation sponsored by its members to serve all stakeholders
through engineering, service and education.
No articles, extracts, photographs or other elements of this publication may
be reproduced in any form whatsoever without the written permission of the
Southern African Bitumen Association
Editor: Hazel Brown
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CEO OVERVIEW
The Asphalt Briquette competition mooted way back in 2015 is now firmly entrenched at Stellenbosch University, having been adopted as part of practical requirements of the civil engineering course. The competition this year once again generated great excitement amongst the student body and saw a “female only” team walk off with the grand prize. We look forward to many more to come as this initiative spreads to other learning institutions.
The Publication by SABS of the new Performance Grade binder specification, SATS 3208 is a milestone of note, given that this journey started way back in 2003. With the latest Asphalt Mix Design Manual / TRH 8 well into the throes of implementation, client bodies can now
reference both these documents in the call for tenders. Improved durability of the paved mix and a better understanding of the rheological behavior of the binder under various conditions, were of the main drivers for the revisions. Future field performance will no doubt continue to guide us in fine tuning our understanding.
Performance Grade Specification SATS 3208 and the new asphalt mix design manual both introduce new tests method for the various test parameters identified. In order to assist with the adoption of these new test methods, Sabita contracted the CSIR to develop detailed test protocols for both. These were circulated to all relevant laboratories and followed up with a workshop on application of these methods. As a further aid, these protocols will be published as Sabita Manual 39 and is freely accessible on the web site. The web site is currently being revamped into a more user-friendly platform that will make it easier to view and download pertinent documents whilst at the same time creating a more modern look and feel. It is expected that this will be finalized in September.
2019 brought with it the celebration of Sabita’s 40th year of servicing the road industry. Whilst it started off as an entity to harmonize bitumen specification, its evolution saw it engaging in many diverse needs required by the road industry over the years. This process will no doubt continue as the industry challenges continue to evolve over time. For us executing the aims and objectives of Sabita it brings great joy and fulfilment…..with the knowledge that we not only serve our members but the country at large. We are sincerely grateful for the input from the committee members to the various initiatives we undertake. Without your selfless contribution it just would not happen!
Another few weeks and CAPSA 2019 will be upon us, bringing to conclusion two and a half years of planning for this event. The programme is full of what’s the latest available on the technical front and as always, the entertainment has not been forgotten. We look forward to your participation.
Saied Solomons
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In celebration of Sabita’s 40th year, highlights of 1970’s, 80’s and 90’s were featured in the April edition of the Asphalt News. The past has an impact on the present and future and the milestones of when and how were stepping stones to the next decade:
2000
The Road Pavements Forum formally took over the functions of, and expanded the objectives of both the Bituminous Materials Liaison Committee (BMLC) and the Cementitious Pavement Forum (CPF) post an agreement struck between Sabita and the CSIR and the first RPF to which industry was invited to was held in June 2000.
2002
This was the year that at Sabita’s instigation, the Asphalt Academy became a joint venture between the trustees of the CSIR and Sabita as a concerted strategy aimed at minimizing the impact of human capacity deficiencies in both the public and private sectors. Post this joint venture, the Academy is now solely under the auspices of Sabita and apart from providing six Material Tester training modules, we also provide Bitsafe Train-the-Trainer and Work Zone Safety Training as well as HSE Seminars.
2004
CAPSA’04, held at Sun City coincided with Sabita’s 25th anniversary and this world renowned conference, managed by Sabita since 1980 included papers from some authors, that 15 years later have once again submitted papers, relevant to industry for CAPSA 2019 which will be held from the 13th to 16th October.
2006
Sabita’s newly developed training course on the safe handling of liquid bitumen, seen as a core element of its global approach to worker health, safety and environmental conservation was launched. This BitSafe training programme, comprising 12 modules has contributed to reducing the number of incidents and minimizes the risk of exposure to hazards in the industry.
2008
Contact with government was manifested in the publication of a second booklet in the Information Series designed to assist local councilors in the implementation of sustainable road maintenance strategies. Another significant event was the presentation of an Award for Outstanding Achievement in Asphalt Technology to Violet Mphafudi. In electing to use hand-operated machinery and labour-enhanced technology developed by a Sabita member, she was able to employ a large number of workers and expanded her original workforce of 42 people to more than 80, of which 40% are women.
2010
In this year, Sabita developed and published the following: Manual 28-Best practice for the Design and Construction of Slurry Seals; Manual 29-Guide to the Safe use of Solvents in a Bituminous Products Laboratory, and Manual 30-Guideline on Binder Distributors.
An overview of Sabita’s landmarks from 2011 to the present will feature in the November edition of the Asphalt News
CELEBRATING 40 YEARS
Mr Arthur Taute presenting an award for “Best presentation by a young Professional” to Mr Sam Muradzikwa
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Composed by CE Rudman and KJ Jenkings
THE ROAD TO SUCCESS
Dovetailing from the accomplishments of previous years, 2019 earmarked yet another successful asphalt competition, thanks to the benevolent sponsorships of BVi Consulting Engineers and Much Asphalt.
At this fourth annual event, the outcomes of the competition did not disappoint. Guided by Sabita’s vision in promoting Asphalt Technology, this event is considered a key element in stimulating pavement engineering. The competition exposes students to the mix design process at a practical level, whilst instilling fundamental principles.
The fourth year students at Stellenbosch University who benefit from this exposure are the next generation of civil engineers, who are about to the market. They recognise that roads, and particularly asphalt, are important and can be sexy.
The asphalt competition motivates students to turn practical sessions into real experiences. This is stimulated through awards kindly sponsored by industry. The event fosters competitiveness whilst making it exciting for the students. In this environment, understanding of technology becomes easier and effective learning takes place.
TAKING THE SCENIC ROUTE ENLIGHTENS THE PATH
The final year of the civil engineering undergraduates begins and students come to the realisation that civil engineering covers a broad spectrum of focus areas. Enter the fourth year pavements course …….. and the road to enlightenment begins, with a few scenic stops along the journey before the grand finale, of course!
En-route, a site visit to Much Asphalt is undertaken. Students are given insights into the origin of asphalt production, technical aspects of asphalt plants and the degree of precision and detail needed to successfully provide a product worthy of to the roads industry. In 2019, the visit did not disappoint with many a students interest piqued. ….Realisation dawns, the icky black stuff has a purpose, and conforms to difficult scientific fundamentals that must be understood to make it work.
The wheels in the head anxiously start turning and nervously asked: What now,…how?
Just in time the course tour arrives at its next pit stop: guided practicals laced with theory. The gauntlet is thrown and the challenge ring-fenced. Students must provide an optimal asphalt mix design based on the highest ITS achieved whilst within target voids of between 3.5-4.5%. The curve ball: If the specimens fall outside of these boundaries a penalty of 20% reduction in score is applied to the highest ITS. A sneaky but strategic approach, challenging the minds of our next generation.
A Colto Medium mix a continuous grading of aggregate along with known asphalt mix properties (70/100) binder, voids versus binder content @ Ndes, compaction temperature = 150°C and aggregate SG) data is provided. This provides some light towards the end of the road.
Of course, challenging the perception of the students that the lecturers are hard taskmasters, they are provided with two opportunities to optimise their mix design, guided by the performance indicators. They are expected to produce a sample with a “Standard” grading (with variable bitumen content) and the “Joker” (varied grading and composition) with each aiming to attain optimal points for performance.
The end goal? Teams stand a chance to win R 6 000, R 3 000 and R 1 800 per group for 1st, 2nd and 3rd
THE 4TH ANNUAL ASPHALT BRIQUETTE COMPETITION… WHERE THEORY TURNS TO PRACTICE
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place, respectively. There is the closing function for all participants, to boot! Lastly, the fun activities will actually transcend from a true learning experience into part of their final grade. Win, win we say!
THE ROAD AHEAD IS WINDING
As the journey progresses, students are introduced to fundamental concepts of asphalt design. In practical sessions students are provided with data regarding the given grading, the specific gravity of the different aggregate sizes and the respective BRD and RICE for a mix of different binder contents are provided.
The students are expected to carry out the necessary calculations to plot binder content vs resulting voids percentage. For the joker mixes, the students are left to their own devices and allowed to change gradings in order to increase the VMA, thereby creating space to accommodate bitumen optimally whilst still observing the target void limitations. The stakes are high and the risks even higher and careful planning before any further action is undertaken. Perpetual bragging rights are at risk if failing the task at hand (Photo 1)!
Photo 1: The stakes are high and planning done meticulousl
Asphalt Mix design is incomplete without dirtying their hands at the coal-face! At the front-line activities include laboratory mixing by hand, to obtain a first-hand feel of the mixes. No shortage of “asphalt chef” skills, of course, and secret ingredients are inserted, each “muti” stranger than the previous. The only limitation is that the additions must not be flammable. The chefs are provided with additional reading material to take them through the process.
Photo 2: Designs put into action
The practical experience once again pays off dividends. And although some groups approach it with serious contemplation, some with ex-treme caution, and many with baffled bemusement, all are eager to understand!! Keeping one’s eye on the ball is the key to success. Groups monitor each step of the process. Naturally, someone might spike the gun along the way (Photo 3)!
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Photo 3:…. Nope all still well, this asphalt has not been tampered with
THE CROWNING CHAMPS FOR 2019
Before the closing function, each group’s specimens are stored under lock and-key and conditioned before testing. The final day begins with anticipation and students taken through the final curtain of the learning experience. Groups are given an opportunity to perform the ITS on their specimens under the guidance of SU experience (Photo 4).
Photo 4: Competition day allows another opportunity for a learning experience
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Real time streaming during testing and final ITS results are projected on computer screens at the function. This maximises suspense until the final countdown. Students await in anticipation to hear the final results. What better way to calm the nerves with a refreshment or two in the meantime?
Photo 5: Students enjoying refreshments whilst awaiting the final judgement
Only when the final result is processed and the judges have made their final decision, the winning group is announced. It seems that the women’s touch makes the perfect mix and an all-girls team shows the way (Photo 6)!!!!
Photo 6: Winners of the 4th National Asphalt Briquette Competition – 2019. From left to right: Colin Brooks (Much Asphalt), Chantal Rudman (SU-Lecturer), Simone Gertse (SU-Student), Zenzile Mhlangu (SU-Student), Melissa Leonards (SU-Student), Lotte Kgasago (SU-Student), Olwethu Maphumolo, (SU-Student), Andre Greyling (BVI), Marais Nel (BVi)At the back: Saied Solomons (Sabita)
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The winning combinations for 1st, 2nd and 3rd prize were a blend of many variables, but finesse in the mix was certainly a large component.
Margins for error are what could break it or make it. The winning team in 2019 succeeded in achieving the highest performance properties by less than 5%, with a standard mix. Unfortunately it appears that the artistic flare did not prevail with only the third prize boasting a Joker design (Figure 1).
Figure 1. ITS results for “Standard” and “Joker” mix after 0.8 factor has been applied
There must have been something in the art of fine touches to a good mix. Well done ladies and gents, our future is in excellent hands. A new generation of young engineers have mastered another level of technical competency and will be able to use the knowledge to the benefit of South Africa’s infrastructure!
Finally, time to eat, relax and reminisce on the day (Photo 7). Thanks are expressed to everyone for making this function a possibility!!
Photo 7: Time to relax, the hard work is over
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CONFIRMED KEY NOTE SPEAKERS
Mr Drs Audney van Helden Dr Thierry Goger Prof. Bill Buttlar Royal Dutch Shell FEHRL – Europe’s National Glen Barton Chair of FlexibleGeneral Manager Specialities Road Research Centres Pavement TechnologyEurope & Africa Secretary General of FEHRL University of Missouri
• The Outlook of the Global and Bitumen Markets• Innovation and Connectivity / Integration of Road Infrastructure• Pavement Technology
As of writing, just over 350 delegate registrations have been received representing 118 companies. Apart from South Africa, these registrations have emanated from Australia, Belgium, England, France, Germany, Namibia, Japan and Taiwan. Forty four exhibitions stands have been booked, leaving just 11 stands available.
Key Note Topics
TO REGISTER FOR CAPSA AND ISAP, PLEASE GO TO www.capsaconference.co.za
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SOCIAL EVENING PROGRAMMESUNDAY, 13TH TUESDAY, 15TH Event: Ice-Breaker Event: Gala DinnerTheme: Around The World Theme: 50 Years CelebrationVenue: Greenhouse Marquee Venue: BallroomSponsor: To be confirmed Sponsor: Much Asphalt (Pty) Ltd
MONDAY, 14TH WEDNESDAY, 16TH Event: Exhibitors Function Event: Closing FunctionTheme: Beach Barbeque Theme: Casual EveningVenue: Valley of the Waves Venue: ShebeenSponsor: Actop Asphalt (Pty) Ltd Sponsor: Raubex (Pty) Ltd
Topics of the invited speakers: Professor Bill Buttlar: Paper: Smart City and Multi-functional PavementsBill Buttlar is the Glen Barton Chair of Flexible Pavement Technology in the Civil & Environmental Eng. Department at the University of Missouri, where he oversees the Missouri Asphalt Pavement and Innovation Lab. He has more than 200 publications and more than 50 invited presentations and keynote lectures.
Professor Gordon Airey: Paper: Binder rheology – interaction between RA binder and added binderGordon is Professor of Pavement Engineering Materials and Director of the Nottingham Transportation Engineering Centre at the University of Nottingham. He has over 25 years of research experience investigating the mechanical and durability performance of asphalt pavement materials with research grants and contracts.
Professor Jo Ellen Sias, Ph.D., P.E: Paper: Incorporating climate change impacts in pavement design and analysisDr. Jo Ellen Sias is a Professor in the Department of Civil & Environmental Engineering at the University of New Hampshire. Her research has focused on material characterization of recycled materials in asphalt concrete mixtures, specifically with respect to cracking and aging, and more recently on the impacts of climate change on infrastructure.
Associate Professor Gabriele Tebaldi: Paper: Cold Recycling: differences between the effects of lime and the effects of cement as active fillerDr. Gabriele Tebaldi is Associate Professor in the Department Engineering and Architecture at the University of Parma and Joint Professor at Engineering School for Sustainable Infrastructures and Environment of University of Florida. His research has focused on mechanical characterization and performance evaluation of bituminous materials, on fracture mechanics in bituminous materials and on recycling of reclaimed asphalt pavements.
Associate Professor Eshan Dave: Paper: Use of Life Cycle Assessment in Pavement Rehabilitation and Maintenance Decision ProcessDr Eshan Dave is currently Associate Professor at the University of New Hampshire. Eshan’s research interests include performance evaluation of pavements and paving materials, development and implementation of performance based specifications, resilient design of transportation infrastructure, climate variability impacts on infrastructure longevity, life cycle assessment, and cold regions pavement operability and performance.
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REVIEW OF SABITA MANUALS
During the past quarter, several manuals have undergone revision and whilst some are still being reviewed, two manuals have been completed and an overview is provided as follows:
MANUAL 36/TRH21: USE OF RECLAIMED ASPHALT IN THE PRODUCTION OF ASPHALT
Technical Recommendations for Highways (TRH) are written for practising engineers, technicians and technologists and describe current best practice in selected aspects of road engineering. The first draft of TRH 21: Hot Mix Recycling was produced in 1996 and updated as “TRH 21: 2009: Hot mix Asphalt Recycling”. A copy of this version was placed on Sabita’s website for a period of three months to encourage comment from local practitioners. It was then circulated to AAPA, NAPA and EAPA for peer review before the final document was published.
Since then there have been significant developments in asphalt recycling and this third edition of TRH 21: The Use of Reclaimed Asphalt in the Production of Asphalt incorporates these advances, based on experience in South Africa and information gathered from around the world in this field.
These guidelines cover all the main aspects of asphalt recycling, a process in which reclaimed asphalt is combined with new aggregate and new binder in a mixing plant to produce recycled asphalt. Experience gained in South Africa and internationally has been incorporated wherever possible.
This manual which can be downloaded from the Sabita website includes pertinent information regarding:
1. Asphalt recycling processes.2. Factors that influence the availability and quality of reclaimed asphalt.3. Investigation of reclaimed asphalt sources.4. Reclaiming, processing and stockpiling reclaimed asphalt.5. Mix design procedures.6. Mixing plant requirements.7. Quality control of recycled asphalt.8. Economic and environmental benefits of the use of reclaimed asphalt in asphalt.9. Occupational health, safety and environmental considerations.10. Contract documentation.
MANUAL 39: LABORATORY TEST PROTOCOLS FOR SOUTH AFRICA
This manual comprises protocols for Bitumen Performance Grading Specification and Advanced Testing of Asphalt Mix in South Africa detailing the following protocols:
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REVIEW
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LSBITUMEN PERFORMANCE GRADING SPECIFICATION PROTOCOLS:
• Determining the Flexural Creep Properties of Bituminous Binder using the Bending Beam Rheometer.
• Determining the Rheological Properties of Bituminous Binder using a Dynamic Shear Rheometer: (G*SINδ).
• Determining the Rheological Properties of Bituminous Binder using a Dynamic Shear Rheometer: Frequency Sweep (and the Ageing Ratio).
• For Multiple Stress Creep and Recovery (MSCR) of Bituminous Binders using a Dynamic Shear Rheometer.
• Accelerated Aging of Bituminous Binder using a Pressurized Aging Vessel (PAV).
• Protocol for Storage Stability.
• Protocol for Viscosity Determination of Bituminous Binder at Elevated Temperatures using a Rotational Viscometer.
PROTOCOLS FOR ADVANCED TESTING OF ASPHALT MIX IN SOUTH AFRICA, FOR:
• Compaction of Asphalt Specimens in the Gyratory Compactor.
• Determining Fatigue Characteristics of Asphalt Mix in the Four-Point Beam Device.
• The Dynamic Modulus Properties of Compacted Asphalt Mixes.
• Determining Rutting and Stripping of Compacted Asphalt Samples in the Hamburg Wheel Tracking Device.
• Determining the Water Permeability of Asphalt Mixes.
REVISION OF OTHER MANUALS
• In respect of COTO’s request to give reference to Sabita manuals, certain TRH and TMH Guidelines will become Sabita manuals as and when they are revised.
• Other manuals that are under review, include the following:
» Manual 5: Guidelines for the Manufacture and Construction of Hot Mix Asphalt
» Manual 33: Design Procedure for High Modulus Asphalt – for which the below items are relevant:
- Updating National Standards
- RSST-CH to be replaced by HWTT
- Discussion of testing specification for HWTT
- Design EME for rutting or fatigue?
- A more detailed section on construction of EME
» Manual 40 / TRH3: Design and Construction of Surfacing Seals: This is expected to be in draft format by October and is to be workshopped at CAPSA.
» TG1: The use of Modified Bituminous Binders in Road Construction: A half-day workshop will be held with all the Producer members to discuss the modification of bitumen being modified, and the significance of this in complying with binder specifications detailed in TG1.
» TG2: Bitumen Stabilised Materials: Review of this manual over the past 18 months, has included a revision of the Pavement Number Pavement Design Method and the DEMAC Material Classification System as well as the Nano-Scale silicon based modification of bitumen emulsions.
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Manual 1 Technical guidelines: Construction of bitumen rubber seals 3rd edition, 1998
Manual 2 Bituminous binders for road construction and maintenance 6th edition, 2014
Manual 3 (Withdrawn)
Manual 4 (Withdrawn)
Manual 5 Guidelines for the manufacture and construction of hot mix asphalt (Under Review) 3rd edition, 2008
Manual 6 (Withdrawn)
Manual 7 SuperSurf – Economic warrants for surfacing roads 1st edition, 2005
Manual 8 Guidelines for the safe and responsible handling of bituminous products 3rd edition, 2011
Manual 9 (Withdrawn)
Manual 10 Bituminous surfacings for low volume roads and temporary deviations 2nd edition, 2012
Manual 11 (Withdrawn) 1st edition, 1993
Manual 12 Labour Absorptive methods in road construction using bituminous materials 4th edition, 2017
Manual 13 LAMBs – The design and use of large aggregate mixes for bases 2nd edition, 1997
Manual 14 (Superseded by TG2)
Manual 15 (Withdrawn)
Manual 16 (Withdrawn)
Manual 17 Porous asphalt mixes: Design and use 1st edition, 1995
Manual 18 Appropriate standards for the use of sand asphalt 1st edition, 1996
Manual 19 Guidelines for the design, manufacture and construction of bitumen rubber asphalt wearing courses
4th edition, 2016
Manual 20 Sealing of active cracks in road pavements 1st edition, 1998
Manual 21 (Superseded by TG2)
Manual 22 Hot mix paving in adverse weather 2nd edition, 2007
Manual 23 Code of practice: Loading bitumen at refineries 2nd edition, 2011
Manual 24 User guide for the Design of Asphalt Mixes 2nd edition, 2018
Manual 25 Code of practice: Transportation, off-loading and storage of bitumen and bituminous products (Under Review)
2nd edition, 2012
Manual 26 Interim guidelines for primes and stone pre-coating fluids 2nd edition, 2011
Manual 27 Guidelines for thin hot mix asphalt wearing courses on residential streets 1st edition, 2008
Manual 28 Best practice for the design and construction of slurry seals 1st edition, 2010
Manual 29 Guide to the safe use of solvents in a bituminous products laboratory 1st edition, 2010
Manual 30 A guide to the selection of bituminous binders for road construction 1st edition, 2011
Manual 31 Guidelines for calibrating a binder distributor to ensure satisfactory performance 1st edition, 2011
Manual 32 Best practice guideline and specification for warm mix asphalt 1st edition, 2011
Manual 33 Design procedure for high modulus asphalt (EME) (Under Review) 2nd edition, 2015
Manual 34 (A) Guidelines to the transportation of bitumen and (B) Bitumen spill protocol (Booklets)
1st edition, 2013
Manual 35/TRH8
Design and use of Asphalt in Road Pavements (Pdf – complimentary) 2nd edition, 2019
Manual 36/TRH21
Use of Reclaimed Asphalt in the Production of Asphalt 1st Edition, 2019
Manual 37 & 38
To be listed by the end of 2019
Manual 39 Laboratory Test Protocols for South Africa 1st Edition, 2019
Technical guidelines (Under Review)
TG1 The use of modified binders in road construction 4th edition, 2019
TG2 Bitumen stabilised materials (Under Review) 2nd edition, 2009
TG3 Asphalt reinforcement for road condition (Under Review) 1st edition, 2008
SABITA MANUALS AND DVDS
DVDs
DVD100 Test methods for bituminous products DVD420 Treatment of bitumen burns
DVD200 Training guide for the construction and repair of bituminous surfacings by hand
DVD430 Working safely with bitumen
DVD300 Manufacture, paving and compaction of hot mix asphalt DVD440 Firefighting in the bituminous products industry
DVD410 The safe handling of bitumen DVD450 Safe loading and off-loading of bitumen
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Composed by Mr John Onraët, Operations Manager
SAT EVENTSThe Society started its series of round-robin workshops in February & March with a very well attended workshop on Understanding Aggregates. Dealing with topics such as the geology, mining and processing, and engineering properties of aggregate, was a panel of expert presenters. This included specialist geologists, experienced quarrymen, highly qualified mechanical engineers and expert asphalt professionals. The combined National audience was more than 350 members and non-members.
This was followed by the second in the series, Understanding Bitumen, which took place during the week of 20th May. In this workshop, audiences were treated to presentations on the origins of crude oil, the manufacture of bitumen, the make up and engineering properties of bitumen and important issues of handling and processing. Once again, experts in these topics kept the audiences of more than 350 people, fascinated.
The third workshop in this series entitled Understanding Binder Modification, is due to be held during the week of 26 August 2019. There is a packed schedule that includes the reasons for modification, influencing factors in the virgin bitumen, the selection process, manufacturing different modified binders, important HSE issues and what’s new in the market. Six industry experts from academia, suppliers, manufacturers, and contracting sectors will deliver what promises to be a winning workshop.
Other events planned by the four Regions include (but not limited to):
• Asphalt quality issues: testing accuracy, interpretation of test results;
• Road safety aspects: riding quality, skid resistance, safety in the construction zone;
• Bitumen Stabilised Materials – what is the future for this material in South Africa?
• The consequential effects of poor drainage on flexible pavements;
• Asphalt density – myths, mistakes, successes, failures;
• Update on the latest technology in asphalt paving and compaction equipment;
• Latest technologies in asphalt mixing plants;
• Latest seal developments from around the world;
• Asphalt Mix Design;
• Recycled Material in Roads;
• Bond coats.
ANNUAL GENERAL MEETING
The Society held its 26th Annual General Meeting on the 2nd of July 2019 in Port Elizabeth, at which the operational and financial performance for the 2018-year was presented to members. Good governance is of paramount importance to the Council of the Society.
Members were advised that membership fees would remain unchanged for the year 2020. In addition, workshop attendance fees would remain unchanged until further notice.
SOCIETY FOR ASPHALT TECHNOLOGY
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MARKETING SATA concerted effort was made to attract new members over the past 18 months and the total membership as at July 2019 stands at 660. Despite the parlous state of our industry and that many members have retired or left South Africa for greener pastures, the membership continues to grow in numbers. The time has come to completely revamp the SAT website and this will begin in September 2019. It is planned to make the website far more user-friendly and interactive. As part of the 3-year Business Plan, the Society’s Executive have agreed that a concerted effort will be made to install committees in new regions. These would include Polokwane, Bloemfontein and even possibly Namibia.
SAT MEMBERSHIP BENEFITS• Free “members only” information, posted on the SAT website;
• Invitations to attend industry forums where applicable; these attract CPD points;
• Access to education at all levels; interaction with other members at SAT social and technology exchange functions; these attract CPD points;
• Access to technical information, publications and audio-visual material;
• Attendance of, and participation in, meetings where presentations are given to members on asphalt related topics; these attract CPD points;
• Updated information on asphalt research;
• Representation of members’ views at asphalt industry functions.
MEMBERSHIP CATEGORIESFellow:-
• Must have been a member in good standing of the Society for a period of at least ten (10) years, unless otherwise agreed by Council and ratified by the members at a General Meeting;
• Have had at least fifteen years’ experience in technologies associated with asphalt or in the opinion of Council, have acquired sufficient knowledge and a position of responsibility in the asphalt industry;
• In the opinion of Council, have made a significant contribution to both SAT and the asphalt industry as a whole; and
• Be well respected by his peers and have a high profile in the asphalt industry.
• A Fellow will be entitled to use the acronym FSAT.
Ordinary Member:-
• Must have a tertiary educational qualification approved by Council;
• Have at least five (5) years’ experience in technologies associated with asphalt; or have, in the opinion of Council, gained an acceptable degree of experience and expertise in asphalt technology;
• An Ordinary Member will be entitled to use the acronym MSAT.
Associate Member:-
• Must be at least eighteen (18) years old at the time of his application for membership;
• Have had at least two (2) years’ experience and be employed in a capacity associated with asphalt technology;
or
• Be a bona fide, registered student at an approved educational institution;
or
• Have an educational qualification approved by Council.
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DURA-TECH SURFACING SYSTEMS
At-Road Construction and Tau Pele Construction recently paved a Dura-Tech Surfacing Trial Section (Ultra-Thin Surfacing) on the N6 Route in Stutterheim. SANRAL agreed to the Trial Section, and the works were supervised by Aurecon, contractual engineers on the project.
Photos 1 and 2: Dura-Tech Surfacing in Stutterheim
The Dura-Tech Surfacing System was developed under Tau Pele/At-Road’s initiative by WHCES Pty Ltd (www.whces.com). The layer was constructed as a surfacing over a newly constructed asphalt inlay. The functional elements of the product includes:
• Improved skid resistance
• Spray reduction
• Noise reduction
• Improved riding quality
• Surface sealing
• Improved tack coat application with exceptional bonding properties
The surfacing system includes the use of a specialised modified binder and the performance of the mix was tested using the Hamburg Wheel Tracking Test (HWTT), which was included over and above the conventional Agrément requirements to ensure a durable and long lasting surfacing product.
A project at O.R. Tambo International Airport, where the asphalt surfacing needs to be replaced with:
• Bitumen Rubber Asphalt-Semi-Open Grade (BRASO) (A-R1 Binder)
• Bitumen Rubber Ultra-Thin-Friction-Course (BRUTFC) (A-R1 Binder)
saw the need to acquire a Vögele Spray Jet (Model S1800-3) for this task.
Composed by: Marius Prinsloo
ASPHALT AND MODIFIEDBITUMINOUS BINDERS
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A-R1 ASPHALT MIX
Introduction
This article briefly discusses the recent experiences with Rubber Asphalt Mixes for Trans African Concessions (TRAC) on the N4 Route, MDC Section 7A and MDC Section 6N. On both contracts, a TRH8 Coarse Grading, using A-R1 modified binder as specified.
Client Quality Engineer Asphalt Design Engineer
Trans African Concessions KBK Engineers Wim Hofsink Civil Engineering Services (Pty) Ltd
The Asphalt Mix Requirements are shown in the Table below:
Property Continuously graded surfacing (A-R1 modified)
Marshall Stability (kn) 8 – 18Marshall Flow (mm) 2 – 5Stability / Flow (kN/mm) -VMA (%) -VFB (%) -Air voids (%) 3 – 6Indirect tensile strength @ 25°C (kPa) > 800Dynamic Creep Modules @ 40°C (MPa) > 15Modified Lottmann @ 7% voids (TSR) > 0, 8Air permeability @ 7% voids (cm2) -Binder film thickness (microns) > 9,0Filler bitumen ratio 0,7 – 1,3Immersion index (%) > 75
Additional to the above, the following is required:
Property
Requirement Specifications
Mini-mum
Maxi-mum
Superpave Gyratory Test** % voids @ Nfinal 300 gyrations) 2,0 -Hamburg wheel tracking test: Number of passes for rut depth off 4 mm at 50º C 20 000 -
Note:*Tests to be done on the working mix using 3 different binder contents, namely the estimated Opti-mum Binder Content (OBC) and 0,5% higher and lower than this OBC.**Tests to be done according to SHRP testing protocol and shall be done at 3 binder contents as for the wheel tracking test.
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Mix Design
The Marshal Mix Design process was used as the predominant method for the design, supported by a number of Specialized tests as required in the prroject specifications. These tests were carried out on Laboratory Prepared Samples in controlled conditions, as per the various and most recent testing protocols.
The initial laboratory prepared design showed an optimal binder content (BC) of 5.7% and 4.6% Voids in Mix. (VIM) Plant Trials done after the initial laboratory design showed a higher BC of 6.1% and 4.6% VIM. This mix was again tested in the laboratory with the slightly coarser grading, which yielded similar volumetric properties than those obtained in Plant Trials.
Current Specifications in a Broader Context
The use of Rubber Modified Asphalt mixes recently became more popular. The contributing factors for the use of Rubber Modified Asphalt may include:
• Improved high-temperature benefitsImproved low-temperature or fatigue properties, compared to the stiffer polymer modified binders.
• High UV resistant binder reducing oxidation and subsequent brittleness.
The Hamburg Wheel Tracking Specification is of specific concern, including the testing protocols for testing plant-mixed asphalt. TRAC opted to specify a low rut depth of 4 mm after 20 000 passes. This limit is comparable with limits normally associated with stiffer mixes, such as A-E2 modified asphalt mixes. Caltrans (California Dept of Transport) for example, differentiate between PG 58; 64 and 70 performance grade binders, specifying a rut depth of 0.5 inches; thus about 12 mm after 20 000 passes.
Asphalt Mixing
At-Road established a Strocam Rubber-Blending Plant for manufacturing A-R1 Modified Binder. The so-called ‘’wet’’ method of producing the A-R1 Modified Asphalt was used. The mix consisted of aggregates from Lafarge Quarries in Nelspruit and hot modified binder, as well as 1% active filler (Lime). No Recycled Asphalt was permitted in the surfacing mix. (As opposed to the requirement for the BTB mix).
Asphalt Testing
A fully equipped Marshal Laboratory was used by the contractor for process control purposes, whilst the Quality Engineer (KBK Consulting Engineering Services) also established a conventional laboratory for quality acceptance testing.
Although specialized tests (Especially Gyratory Voids & Hamburg Wheel Tracking) were not specifically required on plant-mixed asphalt, it was expected that such tests would concur with design properties.
However, some major challenges were encountered in an attempt to conduct these tests on plant mix samples, and both properties (Gyratory Voids and Wheel Tracking) failed.
Property
Typical Test
Result Obtained
Continuously graded
surfacing (A-R1 modified)
Specified Value
Marshall Stability (kn) 11.2 8–18Marshall Flow (mm) 3.4 2 – 5Stability / Flow (kN/mm) 3.1 -VMA (%) 17.0 -VFB (%) 75.6 -Air voids (%) 4.5 3–6Indirect tensile strength @ 25°C (kPa) 1233 > 800Dynamic Creep Modules @ 40°C (MPa) 24.1 > 15Modified Lottmann @ 7% voids (TSR) 0.86 > 0, 8Air permeability @ 7% voids (cm2) 0.88 -Binder film thickness (microns) 9.4 > 9,0Filler bitumen ratio 0.9 0,7 – 1,3Immersion index (%) 95.9 > 75Gyratory Voids after 300 Gyrations 2.5 > 2Hamburg wheel tracking test (Rut Depth) 3.15 < 4 mm
Typical Specialized Test Results obtained on Plant-Mixed A-R1 Asphalt
28
Due to time constraints, the contractor continued with paving trials and construction, whilst these tests were being done. Further to the above, 150 mm diameter cores were sampled, some two to four weeks after construction, which cores were subjected to the Hamburg Wheel Tracking Test.
It became clear that the rutting values tested with the HWTT decreases over time (2– 4 weeks after construction) compared to testing the same mix directly after manufacturing. Curing experiments in the laboratory done by STL laboratory also revealed the same tendency.
From this finding it is important to note the difference between homogeneous and non – Homogeneous binders as each needs a different approach regarding evaluation and approval of mixes. It also became clear that the evaluation of the HWTT should be followed as explained in Sabita Manual 35/TRH8 (Design and use of Asphalt in Road Pavements) looking at the strip slope and the creep slope and not the maximum rut only as this can result in misleading information.
The following wheel tracking results were obtained on the cores:
Core Sample, subjected to 20 000 passes (HWTT) Typical Test Result Obtained (Max Rut mm)
Sample 1: Hamburg wheel tracking test (Rut Depth) 3.35Sample 2: Hamburg wheel tracking test (Rut Depth) 3.90Sample 3: MML S @ 100 000 cycles) 1.92
Marshal Testing was done on site, with freshly sampled asphalt mixes from the plant. Fairly consistent and comparative test results were obtained between the contractor’s and engineer’s laboratories. Challenges observed related to the specialized tests, for which samples needed to be transported to Pretoria (a 2 to 3-hour drive).
With A-R1 modified asphalt, the digestion process continues, with the mix deteriorating over the time period, up to the time when the laboratory receives the sample. Due to the cooling down of the sample, some reheating is required prior to the preparation (compaction) of the briquettes. This causes further possible deterioration of the binder, which again impacts on the reliability of the test result.
CONCLUSIONS
Implementing new equipment, incorporating latest best practice knowledge and information into mix design development and investing in some external research work on asphalt mixes are all part of a strategy to ensure a quality and that a durable product is produced for the client.
Specifications on Performance testing needs careful consideration on type of binders and type of mix to be used to ensure a balanced outcome as far as rutting and fatigue properties are concerned.
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UP-COMING EVENTS
• Sabita Health & Safety Seminars » 10th: Gauteng » 11th: Durban » 19th: Cape Town » For more information, email Lorraine Wagner at
• 10th: Gauteng - Routine Road Maintenance via SARF (www.sarf.org.za)
• 25-27th – Argus Bitumen and Bituminous Products: Singapore (www.argusmedia.com/en)
• 1-3rd: Sampling Material Tester Course, Cape Town (www.asphaltacademy.co.za)
• 13-16th: CAPSA and ISAP Conference (www.capsaconference.co.za)
• 20-22nd: Argus Fuel Oil Summit, Miami, Florida (www.argusmedia.com/en)
• 22-24th Sampling Material Tester Course, Gauteng (www.asphaltacademy.co.za)
• 5th: Design of Asphalt for Road Pavements Pretoria, SARF (www.sarf.org.za)
• 13-14th: Road Pavement Forum, Pretoria
SEPTEMBER
OCTOBER
NOVEMBER
30
BACKGROUND
The modern era of higher traffic volumes and loads, demand an improvement in durability to paved roads. Current empirical binder testing provides limited information on future pavement performance and moreover, empirical tests cannot effectively characterize modified binders which are being increasingly used throughout the world. This has resulted in a move internationally to establish specifications based on fundamental engineering properties capable of better guidance in considering the performance requirements of asphalt mixes.
This evolution has not escaped South Africa as it started tackling a possible new specification way back in 2003, with the intent that Performance Grading should:
o Include measures describing stress /strain relationships under field loading.o Consider the pavement conditions – Temperature, traffic speed, traffic volume, and pavement
structure.o Include acceptance limits derived from experience and factual field performance
This initiative was given further impetus with the development of the South African Road Design System and the new Asphalt Mix Design Manual (Sabita Manual 35 / TRH8), both calling for performance tested characteristics.
BASIS OF THE SPECIFICATION
Asphalt layers and spray seals in service are required to resist the following forms of distress:
• Distortion – permanent deformation; and• Fracture due to:
– Fatigue or loss of durability– Temperature fluctuations
In addition they should be durable i.e. maintain their properties to counter distress for a long period. As a result, the concept of damage resistance characteristics (DRC) developed in 2010 in the USA was introduced to provide a specification framework to gauge the binder’s resistance to damage resulting from:
• Permanent deformation (viscous flow) – at elevated temperatures and slow rates of loading;• Cracking – at intermediate temperatures; and• Temperature fracture – at low temperatures.
The specification framework should facilitate rational selection of binders on the basis of:
• traffic volumes and speed• climate (max and min temperatures)• binder durability
Further to the above performance related properties, additional requirements have been set in the interests of safety, storage stability and viscosity limits to facilitate handling and application at elevated temperature.
This draft specification has now been published as a SABS Technical Specification, SATS 3208. While SANS 4001-BT1, will for now still be the applicable standard of compliance for those that carry the SABS mark, the technical standard (SATS 3208) allows for the market to specify a performance related specification in South Africa. SANRAL and certain other road authorities will now call for compliance to SATS 3208 in tender documents.
PERFORMANCE GRADE SPECIFICATIONSFOR BITUMEN IN SOUTH AFRICA
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SA TECHNICAL SPECIFICATION AND REPORT VALUES
Note: 1 While the binder is sampled at 80°C, G* is determined at Tmax
Detailed laboratory testing protocols have been developed for these tests and will be published as Sabita Manual 39.
Test property
PERFORMANCE GRADE
58S -22
58H -22
58V -22
58E -22
64S -16
64H -16
64V -16
64E -16
70S -10
70H -10
70V -10
70E -10
Maximum pavement design temperature, Tmax (˚C)
58 64 70
Minimum grading temperature, Tmin (˚C)
-22 -16 -10
ORIGINAL BINDER
G* and δ at TIT, Pa, degreesCompulsory report only during implementation phase
G*/sinδ, at 10 rad/sec and Tmax , (kPa) Compulsory report only
Viscosity @ 165°C, ≥30 s-1
, (Pa.s)≤ 0.9
Storage stability at 80°C (% diff, G*T and G*B) at Tmax
1 ≤ 15
Flash Point (˚C) ≥ 230
AFTER RTFO AGEING
G* and δ at TIT , Pa, degrees Compulsory report only during implementation phase
Mass Change (m/m), (%) ≤ 1.0
JNR @ Tmax , (kPa-1) ≤ 4.5 ≤ 2.0 ≤ 1.0 ≤ 0.5 ≤ 4.5 ≤ 2.0 ≤ 1.0 ≤ 0.5 ≤ 4.5 ≤ 2.0 ≤
1.0
≤ 0.5
Ageing Ratio, G*RTFOT/G*Original
≤ 3.0
AFTER RTFO AND PAV AGEING
G* and δ at TIT , Pa, degrees Compulsory report only during implementation phase
Creep stiffness, S (60s) at Tmin + 10oC , MPa, ≤ 300
m (60s) at Tmin + 10oC, minimum, MPa/s
≥ 0.300
ΔTc𝑻𝒄𝑺−𝑻𝒄,𝒎 , (0C) ≥ – 5
Ageing Ratio, G*PAV/G*Original ≤ 6.0
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At Sabita’s first Council meeting held on the 4th April, Ms Chetty from Vani Chetty Competition Law (Pty) Ltd provided a presentation on amendments of the Competition Act that were signed into law and published in the Government Gazette in February 2019. An overview of the detailed presentation which is available on the Sabita web-site is summarised as follows:
INTRODUCTION
The amendments focuses on economic growth and transformation, addressing concentration in the market, SMEs and firms owned/controlled by HDPs, labour, increases in government involvement in competition matters and clarifies enforcement provisions which have previously proved difficult for the competition authorities in prosecuting firms.
PREAMBLE TO THE AMENDMENTS
Ms Chetty highlighted that the amendments:• Clarifies and improves the determination of prohibited restrictive horizontal and vertical practices,
abuse of dominance and price discrimination.• Strengthens the penalty regime.• Introduces greater flexibility in the granting of exemptions.• Strengthens the role of market inquiries and merger processes through addressing the structures and
de-concentration of markets.• Protects and stimulates the growth of small and medium businesses and firms owned and controlled
by historically disadvantaged persons while at the same time protecting and promoting employment, employment security and worker ownership.
• Facilitates the effective participation of the National Executive in competition proceedings, making provision for the National Executive’s intervention in respect of mergers that affect the national security interests of the Republic.
• Mandates the Commission to act in accordance with the results of a market inquiry.• Amends the process by which market inquiries are initiated and promotes greater efficiency regarding
the conduct of market inquiries.• Clarifies and fosters greater certainty regarding the determination of confidential information and
access to confidential information.• Provides the Commission with the powers to conduct impact studies on prior decisions.• Promotes the administrative efficiency of the Commission and Tribunal. The Commission will now
comprise of the Commissioner and two or more deputies appointed by the Minister.
ABUSE OF DOMINANCE - STRENGTHENING OF EXCESSIVE PRICING PROVISIONS
Some of the amendments regarding dominance are highlighted as follows:• Definition of excessive price has been deleted.• Amendment to section 8(a) – the excessive pricing provision which previously prohibited a dominant
firm from charging an excessive price to the detriment of consumers. • Dominant firms may not charge an excessive price to the detriment of consumers and customers.• New section 8(2) – if there is a prima facie case of abuse of dominance because of an excessive price,
the onus is on the dominant firm to show that the excessive price was reasonable.• New section 8(3) – lists a host of factors to be taken into account when determining whether a price is
excessive.• In determining whether a price is excessive, must determine if that price is higher than a competitive
price and whether such difference is unreasonable.For more information, contact Vani Chetty Competition Law or visit the National Government web-site.
COMPETITION ACT: An overview
HONORARY MEMBERS
Mr W G Babb Mr P A Myburgh Mr D Rossmann
Mr D G Green Mr D L Orton Mr D J Stiglingh
Mr R H Kingdon Mr J A M Pike Mr M D Winfield
SABITA BOARD MEMBERS
PRODUCER MEMBERS
Actop Asphalt (Pty) LtdP O Box 16661, Atlasville 1465Tel: 011 395 3346 Colas SA (Pty) LtdP.O. Box 82, Eppindust, 7475Tel: 021 531 6406
Much Asphalt (Pty) LtdP.O. Box 49, Eerste Rivier, 7100Tel: 021 900 4400
National Asphalt (Pty) LtdP.O. Box 1657, Hillcrest, 3650Tel: 031 736 2146
Shell Downstream SA (Pty) Ltd6 Ipivi Road, Kloof, 3610Tel: 031 571 1000
Rand Roads (a div. of Aveng Grinaker LTA)Private Bag X030, Kempton Park, 1620Tel: 011 923 5000
Tau Pele Construction P O Box 13125, Noordstad 9302 Tel: 051 436 0103
Tosas (Pty) LtdP.O. Box 14159, Wadeville, 1422Tel: 011 323 2000
Zebra Surfacing (a div. of Martin & East (Pty) Ltd)P.O. Box 14335, Kenwyn, 7790Tel: 021 761 3474
Total SA (Pty) LtdP.O. Box 579, Saxonwold, 2132Tel: 011 778 2000
Masana Petroleum Solutions (Pty) LtdP O Box 1085, Saxonwold 2132Tel: 011-544 6300
Astron Energy (Pty) Ltd5, Century Boulevard, Century City 7441Tel: 021 403 7911
Sasol Energy a div.of Sasol S A (Pty) LtdP O Box 5486, Johannesburg, 2000Tel: 010 3445572
SABITA MEMBERS
WELCOME TO THE FOLLOWING NEW MEMBERS:Mafate Business Enterprises, represented by Mr Victor Makhabate is based in Limpopo and is Sabita’s latest Ordinary “D” member. It was established at Steelpoort, under the entrepreneurial spirit of its Director Mr Mahlaka Lucas Makuwa in the year 2002. it is a competent and competitive black owned Mining supply Company that delivers quality products and services into the local and national markets. It has a dynamic management team ensuring the best quality service delivery to all its clients. It also serve as an empowerment vehicle developing more individual in its area of operations.
Mr Wynand Nortjé is the official representative for Shisalanga Construction (Pty) Limited based in Glencoe, also an Ordinary “D” member and is part of the Raubex Group. Since it opened in 1998, Shisalanga has grown from strength to strength and now not only manufactures and paves hot mix asphalt, but produces a high quality coldmix asphalt, lay surface and slurry seals, crack sealing, deep and shallow milling, insitu-stabilizing and hydro surface treatment.
The third new member for 2019, being an Affiliate member is Tzaneen Asphalt and Paving Manufacturers headed up by Mr Vincent Mabunda based in Nkowankowa. Tzaneen Asphalt & Paving manufacturers is 100 percent BEE founded in 2012 to address the poor quality of roads in the Mopani and Vhembe regions.
34
ORDINARY MEMBERS
Actophambili Roads (Pty) Ltd P O Box 16661 Atlasville 1465 Tel 011 3952293
AmandlaGCF Construction cc P O Box 6064 Welgemoed 7538 Tel 021 9817070
AJ Broom Road Products cc P O Box 16421 Dowerglen 1612 Tel 011 4543102
Aqua Transport & Plant Hire (Pty) Ltd Private Bag X11 Ashwood 3605 Tel 031 5336883
Astec – Asphalt Technology P O Box 589 Rothdene 1964 Tel 016 3621310
Bituguard Southern Africa P O Box 2523 Bethlehem 9700 Tel 058 3037272
Bitumen Supplies & Services (Pty) Ltd P O Box 1028 Sunninghill 2157 Tel 011 8039338
Bitumen World PVT P O Box AY20 Amby Harare Zimbabwe Tel +263 772417102
Black Asphalts and Liquids P O Box 134 Edendale 3217 Cell 072 9004915
Concor Infrastructure P O Box 585 Bedfordview 2008 Tel 011 5905843
Green Asphalt (Pty) Ltd Moretele District North West 0483 Cell 0761017751
Javseal (Pty) Ltd P O Box 26317 Isipingo Beach 4115 Tel 031 9025988
Liesen Bitumen (Pty) Ltd Postnet Suite 228 PBag X9063 East London 5200 Tel 043 0040041
Milling Techniks (Pty) Ltd P O Box 779 Gillits 3603 Tel 031 7929580
More Asphalt (Pty) Ltd P O Box 2180 Durbanville 7550 Tel 021 9750784
Polokwane Surfacing (Pty) Ltd P O Box 288 Ladanna 0704 Tel 015 2931221
Power Construction (Pty) Ltd P O Box 129 Blackheath 7581 Tel 021 9071300
Puma Energy Services SA (Pty) Ltd Postnet Suite 190 Private Bag X31 Saxonwold 2132 Tel 011 3436998
Raubex (Pty) Ltd P O Box 3722 Bloemfontein 9300 Tel 051 406 2000
Raubex KZN (Pty) Ltd P O Box 10302 Ashwood 3605 Tel 031 7006411
Road Material Stabilisers P O Box 84513 Greenside 2034 Tel 011 3903499
Spray Pave (Pty) Ltd P O Box 674 Alberton 1450 Tel 0118685451
Tekfalt Binders (Pty) Ltd P O Box 531 Bergvlei 2021 Cell 083 5792899
ASSOCIATE MEMBERS
Advanced Polymers (Pty) Ltd P O Box 9452 Edenglen 1613 Tel 011 3977979
AECOM SA (Pty) Ltd P O Box 3173 Pretoria 0001 Tel 012 4213500
Ammann Const. Machinery SA (Pty) Ltd Private Bag X43 Rynfield 1500 Tel 011 8493939
Anton Paar Southern Africa P O Box 50471 Randjiesfontein 1683 Tel 011 0215165
Aurecon SA (Pty) Ltd P O Box 494 Cape Town 8000 Tel 021 5269400
BSM Laboratories (Pty) Ltd P O Box 15318 Westmead 3608 Tel 031 7646537
BVi Consulting Eng. W Cape (Pty) Ltd P O Box 86 Century City 7446 Tel 021 5277000
CIM Chemicals (Pty) Ltd Pnet Suite 479 PBag X 29 Gallo Manor 2052 Tel 011 7081494
Dick King Lab Supplies (Pty) Ltd P O Box 82138 Southdale 2135 Tel 011 4999400
DuPont de Nemours SA (Pty) Ltd P O Box 3332 Halfway House 1635 Tel 011 2188600
EFG Engineers (Pty) Ltd P O Box 3800 Durbanville 7551 Tel 021 9753880
Gibb (Pty) Ltd P O Box 3965 Cape Town 8000 Tel 021 4699172
Glad Africa Consulting Eng. (Pty) Ltd P O Box 3893 Cape Town 8000 Tel 021 4626047
GMH/Tswelo Consulting Engineers P O Box 2201 Randburg 2125 Tel 011 4620601
Hatch Goba (Pty) Ltd P O Box 180 Sunninghill 2157 Tel 011 2363331
HHO Africa P O Box 6503 Roggebaai 8012 Fax 021 4252870
Impact Chemicals (Pty) Ltd P O Box 30792 Kyalami 1684 Cell 082 8998187
iX Engineers (Pty) Ltd P O Box 22 Menlyn 0063 Tel 012 7452000
Industrial Oleochemical Products (Pty) Ltd div. of AECI Ltd P O Box 12080 Jacobs 4026 Tel 031 4618680
JG Afrika (Pty) Ltd P O Box 1109 Sunninghill 2157 Tel 011 8070660
Kantey & Templer (Pty) Ltd P O Box 3132 Cape Town 8000 Tel 021 4059600
Kaymac (Pty) Ltd T/A Kaytech P O Box 116 Pinetown 3600 Tel 031 7172300
SABI
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35
MEM
BERS
ASSOCIATE MEMBERS (continued)
Leo Consulting (Pty) Ltd P O Box 32798 Totiusdal 0135 Tel 012 3339705
Mott MacDonald Africa (Pty) Ltd P O Box 7786 Roggebaai 8012 Tel 021 4405060
Nadeson Consulting Services (Pty) Ltd P O Box 51121 V&A Waterfront 8002 Tel 021 4184988
Naidu Consulting (Pty) Ltd P O Box 2796 Westway 3635 Tel 031 2656007
Namibia Technical Services cc P O Box 30623 Windhoek Namibia Tel +264 61 215324
Rankin Engineering Consultants P O Box 50566 Lusaka Zambia Tel +260 1 290562
Royal Mndawe Holdings (Pty) Ltd (t/a ROMH Consulting) Office 167, 14th Road Noordwyk 1687 Tel 010 0351460
Royal HaskoningDHV P O Box 867 Gallo Manor 2146 Tel 011 7986051 Sasol Chemicals a div. of Sasol SA (Pty) Ltd Chemcity 2 P O Box 1 Sasolburg 1947 Tel 016 9602126
SMEC SA (Pty) Ltd P O Box 72927 Lynnwood Ridge 0040 Tel 012 4813821
Specialised Road Tech. (Pty) Ltd P O Box 15324 Westmead 3608 Tel 031 7004510
TPA Consulting (Pty) Ltd P O Box 1575 Westville 3630 Tel 031 7651907
Tshepega Engineering (Pty) Ltd P O Box 33783 Glenstantia 0010 Tel 012 6652722
Worldwide Tanks on Hire cc P O Box 2250 Durban 4000 Tel 031 3620207
WSP Group Africa (Pty) Ltd P O Box 98867 Sloane Park 2152 Tel 011 3611402
Zimile Consulting Engineers P/ Suite 252 Private Bag X11 Halfway House 1685 Tel 011 4668576
AFFILIATE MEMBERS
ASPASA P O Box 1983 Ruimsig 1732 Tel 011 7913327
Cape Laboratory Equipment P O Box 20244 Big Bay 7448 Tel 021 8395163
Cape Pen. Univ. of Technology P O Box 652 Cape Town 8000 Tel 021 4603074
DMV Harrismith (Pty) Ltd P O Box 912 Harrismith 9880 Tel 058 6222676
Dubang Roads & Environmental Solutions P O Box 782 Melrose Arch Gauteng 2076 Cell 084 8538304
Durban University of Technology P O Box 101112 Pietermaritzburg 3209 Tel 033 8458916
Gavin R.Brown & Associates P O Box 51113 Musgrave 4062 Tel 031 2025703
GT Design & Technologies 137 Jan Hofmeyr Road Westville 3630 Tel 031 2660933
IMESA P O Box 2190 Westville 3630 Tel 031 2663263
Instant Tar Services P O Box 17219 Norkem Park 1631 Tel 011 3935194
Letaba Laboratory (Pty) Ltd P O Box 739 White River 1240 Tel 013 7527663
Mdubane Energy Services (Pty) Ltd 214 9th Ave. Morningside Durban 4001 Tel 031 3042470
Mmila Civils & Traffic Services P O Box 40158 Faerie Glen 0043 Tel 012 9933098
Nathoo Mbenyane Engineers P O Box 47595 Greyville 4023 Tel 031 3122097
Nelson Mandela University P O Box 77000 Port Elizabeth 6031 Tel 041 5043298
N3TC (Pty) Ltd P O Box 2063 Bedfordview 2008 Tel 011 4543596
Outeniqua Laboratory (Pty) Ltd P O Box 3186 George Industria 6536 Tel 044 8743274
Pride Lab Equipment (Pty) Ltd 3 Van Eyck Crescent De La Haye Bellville 7530 Tel 021 9462018
Reliance Laboratory Equipment P O Box 911-489 Rosslyn 0200 Tel 012 5498910
Salphalt (Pty) Ltd P O Box 234 Isando 1600 Tel 011 8232218
South African Road Federation P O Box 8379 Birchleigh 1621 Tel 011 3945634
Uni. of Pretoria Dept. Civil Eng. Lynnwood Road Hatfield 0002 Tel 012 4202171
Uni. of Stellenbosch Dept. Civil Eng. Private Bag X1 Matieland 7600 Tel 021 8084379
FOREIGN MEMBERS
Kraton Polymers Netherlands B.V Transistorstraat 16 NL-1322 CE Almere, The Netherlands Cell 082 4570210
Rettenmaier & Söhne GMBH Global (establishing a base in Johannesburg) Tel 011 5348619
Zydex Industries Gujaret India T+91 2653312000
Asphalt News is published by the Southern African Bitumen Association (Sabita),a non-profit organisation sponsored by its members to serve all stakeholders through engineering, service and education.
Sabita and the associations listed below have founded a global strategic alliance of asphalt pavement associations (GAPA) and are working jointly towards a full, open and productive partnership:
Australian Asphalt Pavement Association (AAPA)European Asphalt Pavement Association (EAPA)Japanese Road Contractors Association (JRCA)Mexican Asphalt Association (AMAAC)National Asphalt Pavement Association (NAPA)Civil Contractors New Zealand
The contents of this publication may be reproduced without any changes and free of charge, providing the source is acknowledged.
Southern African Bitumen Association (Sabita)Postnet Suite 56, Private Bag X21 | Howard Place, 7450, South AfricaTel: +27 21 531 2718 | Fax: +27 21 531 2606 | Email: [email protected]
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