SEVENTH ROAD PAVEMENT FORUM26 November 2003

FEEDBACK FROM THE

ASPHALT REINFORCEMENT

WORKING GROUP

TERMS OF REFERENCEResolution #2

An RPF technical group should be formed to investigate the development of a national guideline / code of practice on asphalt reinforcement. Proposed members:

– CSIR Transportek, – University and

Technikon, – Clients, – Industry, – Producers

MEMBERS

•CSIR, (Wynand Steyn)•University (Emile Horak) •Technikon (Chris de Jager)•Clients (Mias Wiese, Enrico Fletcher)

•Asphalt Industry (Julian Wise)•Consultants (Philip Joubert, Rob Brown, Joe Grobler)

•Producers (Marco Pauselli, Garth James, Cobus Venter)

SCOPE

•Asphalt Reinforcement, against cracking, rutting and strengthening

•All types of interlayers, not fibres

•Asphalt, not surfacing seals (TRH3)

•southern Africa

NEED

•To enhance the transfer of technology on upgrading of damaged roads

•To have best practice documented

•To have as guides part of the toolbox

•To assist new entrants in design/construction field

TYPE OF DOCUMENT

•Immediate need is for guidelines

•Develop into Code of Practice later

•Not Agrément or

•PPGS route at present

GUIDELINE DOCUMENT

•Do not re-invent the wheel

•Investigate available international guides

•Europe, USA, Australia

COST 348 action

•Reinforcement of Pavements with Steel Meshes and Geosynthetics

•Duration: 3 years; due to be completed in Jan 2005

•One of the actions supported by the COST Research part of the European Commission – Research (16 Countries)

•Each of four working groups will produce a Deliverable Report

•Will be promoted on the Internet.

COST 348 action

To enhance the process of material assessment and designTo develop appropriate structural design methods and measurement techniques to reach the status of a generally accepted alternative.Enhance reinforcement technologiesStimulate contacts and transfer of knowledgeProduce material testing methods

PROJECT DATA BASE

•Get SA ducks in a row

•What are success or failure factors?

•Collect essential information in structured way

•Add usefull information where available

•Develop southern African project database

•Add overseas info where appropriate

Y-Max BLI Case Studies

PRODUCT X: OVERLAYS > 50 MM

< 300

300 - 600

> 600

< 95

95 - 130

> 130

A,B,C

D,E

F,G,H

Base Layer Index

ME

SA

PRODUCT X: OVERLAYS > 50 MM

Already Cracked

Not Yet Cracked

ACTIONS

•Compile Project Info Requirements (Feb 04)

•Complete international guideline review and recommend most appropriate if any

•Include 5th RILEM International Conference on Cracking in Pavements (5-8 May 2004) (COST 348)

•Draft contents for guideline document

•Contributions invited on any of above