CFF GmbH & Co. KG

Your supplier of native cellulose fibers

CFF‘s products and

application in SMA

CFF GmbH & Co. KG

CFF GmbH & Co. KGCFF GmbH & Co. KG

• CFF

• SMA

• GENICEL Modification

CFF GmbH & Co. KGLocation in Gehren / Thuringia

CFF GmbH & Co. KG

CFF GmbH & Co. KG

Factory in Gehren/Thuringia

CFF GmbH & Co. KG

Founded 1977 Employees 80 Production capacity approx. 42.000 tons

(> 17.000 tons for TOPCEL) Export rate > 70 % Certified to ISO 9001

SMA Stone Matrix Asphalt

Basics

Modification of bitumen

CFF GmbH & Co. KG

HighwayA 9,Situation in year

1994

Transportation

CFF GmbH & Co. KG

Today: permanent traffic jams

CFF GmbH & Co. KG

SMA – Stone Matrix Asphalt

Stone Matrix Asphalt :– aggregate mix with a high content of large

aggregates– only crushed aggregates– Mainly Modified bitumen – stabilising additives for the prevention of bitumen

drainage during storage, transport, laying down.

CFF GmbH & Co. KG

CFF GmbH & Co. KG Comparison of mineral structure

Stone Mastic Asphalt / Asphalt Concrete

Coarse aggregate 73 - 80 weight.-% 55 - 65 weight.-%> 2mm

Filler/Sand Content 20 - 27 weight.-% 35 - 45 weight.-%< 2mm

Bitumen Content > 6,5 weight.-% 5,9 - 7,2 weight.-%Air Void Content < 6 Vol.-% < 7 Vol.-%

SMA 0/11 AC 0/11

characteristicscharacteristics propertiesproperties

High content of chippings

Bitumen: modified Bitumen

thick bitumen-/ mortarcoatings

stabilising additivs (TECHNOCEL /

TOPCEL)

Stone skeleton - High stability (temperature

independent)

Supporting the stability

Better aging behavior

Prevention of the bitumen drainage during storage, transport, laying down

CFF GmbH & Co. KG

CFF GmbH & Co. KG

Asphalt Concrete SMA

High resistance to permanent deformation

characteristics of SMA – under performance conditions

High resistance to attrition / wear

Not sensitive to low temperature cracking and mechanical stresses

Coarse grained surface texture

Longer lifetime

CFF GmbH & Co. KG

Aggregates

aggregates with high polishing resistance heavy duty traffic !!

PSV min. 50

cubic aggregate shape not flaky, not elongated!

Relation crushed sand / natural sand

1 : 0

CFF GmbH & Co. KG

Binder / Bitumen

bitumen (straight run) DIN EN 12591

Bitumen 50 / 70

For heavy duty traffic, bridges : Polymer Modified Bitumen PmB 45 or GENICEL modified Bitumen

CFF GmbH & Co. KG

Stabilising additivs

Prevention of the bitumen drainage during storage, transport, laying down:

Materials:Cellulose granules / pelletsTECHNOCEL 1004-G - granulesTOPCEL - pelletsGENICEL - 2-component-pellets (cellulose +

bitumenmodifier)

CFF GmbH & Co. KG

CFF GmbH & Co. KG

Function of stabilizing additives in asphalt

- TECHNOCEL ® and TOPCEL ®

used primarily as a bitumen carrier to increasethe thickness of binder coating.

- TECHNOCEL ® and TOPCEL ®

designed to stabilize the homogenity of asphaltand to avoid the drainage of the binder fromthe mineral aggregate duringproduction, storage, transport and lay down.

Mix design

grading SMA 0/11S

2/5 1

5/8 2

8/11 4

parts

SMA 0/8S

2

5,5

parts

SMA 0/8

2,5

4,5

parts

CFF GmbH & Co. KG

SMA 0/11 S

AC 0/11

mesh density Square holes density [mm]

passin

g a

sie

ve [

M.-

%]

rem

ain

ing

on

sie

ve [

M.-

%]

CFF GmbH & Co. KG

CFF GmbH & Co. KG

Splittmastixasphalt

Bezeichnung SMA 16

S SMA 11

S SMA 8

S SMA 5

S SMA 8

N SMA 5

N

Baustoffe

Gesteinskörnungen (Lieferkörnung)

Widerstand gegen Zertrümmerung SZ SZ18 (LA20) SZ18 (LA20) SZ18 (LA20) SZ18 (LA20) SZ18 (LA20) SZ18 (LA20)

Widerstand gegen Polieren PSV PSV53 PSV53 PSV53 PSV53 PSV50 PSV44 res. Mindest-Fließkoeffizient der Korngruppen 0/2

s 38 35 35 35 30 30

Bindemittel, Art und Sorte PmB 45;

PmB 25; 50/70

PmB 45; (PmB 25)

PmB 45; (PmB 25)

(PmB 45); PmB65; 50/70

50/70; 70/100; PmB 65

70/100; 50/70

Draft for new European standard: 2007

CFF GmbH & Co. KG

Zusammensetzung Asphaltmischgut

Gesteinskörnungen

Siebdurchgang bei 16 mm M.-% 90 bis 100 11 mm M.-% 65 bis 80 90 bis 100 8 mm M.-% 55 bis 60 50 bis 60 90 bis 100 90 bis 100 5 mm M.-% 35 bis 45 35 bis 55 90 bis 100 40 bis 70 90 bis 100 2 mm M.-% 20 bis 30 20 bis 30 20 bis 30 30 bis 40 20 bis 30 30 bis 40

0,125 mm M.-% 9 bis 14 9 bis 14 9 bis 14 9 bis 17 9 bis 16 9 bis 17 0,063 mm M.-% 8 bis 12 8 bis 12 8 bis 12 7 bis 12 7 bis 12 7 bis 12

Bindemittelgehalt Bmin Bmin 6,4 Bmin 6,8 Bmin 7,2 Bmin 7,4 Bmin 7,2 Bmin 7,4

Bindemittelträger M.-% 0,3 – 1,5 0,3 –1,5 0,3 – 1,5 0,3 – 1,5 0,3 – 1,5 0,3 – 1,5

Mischguteigenschaften

minimaler Hohlraumgehalt Vmin Vmin 3,0 Vmin 3,0 Vmin 3,0 Vmin 2,0 Vmin 2,0 Vmin 2,0

maximaler Hohlraumgehalt Vmax Vmax 4,0 Vmax 4,0 Vmax 4,0 Vmax 4,0 Vmax 4,0 Vmax 4,0

maximaler Hohlraumausfüllungsgrad VFBmax VFBmax80 VFBmax83 VFBmax83 VFBmax83 VFBmax86 VFBmax86

proportionale Spurrinnentiefe PRDLuft PRDLuftNR PRDLuftNR PRDLuftNR

Splittmastixasphalt

Bezeichnung SMA 16

S SMA 11

S SMA 8

S SMA 5

S SMA 8

N SMA 5

N

Stability tests

• Marshalltest (Stability and flow) not suitable!

• Wheel Tracking Test (WTT) – „Bestimmung der Spurtiefe “ nach TP A-StB

suitable!

• Dynamic compression test (Druckschwellversuch) – „Bestimmung des Verformungs- verhaltens von Walzasphalten bei Wärme“ nach TP A-StB

suitable!

CFF GmbH & Co. KG

WTT - Wheel Tracking Test

CFF GmbH & Co. KG

WTT - Wheel Tracking Test

CFF GmbH & Co. KG

WTT - Wheel Tracking Test

Failed samples

CFF GmbH & Co. KG

WTT - Wheel Tracking Test

Failed samples

CFF GmbH & Co. KG

“Binder Drainage Test” ( Schellenberg / v.d. Weppen)

Give 1000 bis 1100 g asphalt under production conditions (temperature) into a 800 ml glass beaker

Store the covered beaker for 60 +/- 1 min in a preheated oven (temperature 170°C +/- 1°C)

Directly after removal – turn the glass beaker from bottom to the top

Weigh the beaker incl. the remaining bitumen with a precision of 0,01 weight %

• more remaining bitumen/asphalt – more segregation!

CFF GmbH & Co. KG

CFF GmbH & Co. KG

Left side: SMA with 0,3% TECHNOCEL® / TOPCEL ®

Right side: SMA without stabilizing additives

The binder drain down test shows

whether a stabilizing additive can prevent

draining down of the binder and the asphalt mortar

from the mineral aggregates.

A remainder of approx. 0.1 - 0.2 is considered as indicative value.

0 0, 1 0, 2 0,3 0,4 0,5 Fiber adding in weight-%

1,8

1,6

1,4

1,2

1,0

0, 8

0, 6

0, 4

0,

2 0

Bin

der d

rain

ag

e in

weig

ht-%

0,05 0,15 0,3 0,45

2,0

0,3

0,08 0,05

Amount of bitumen of an SMA 0/11dependend on the fiber content(Cellulose)

Amount of bitumen of an SMA 0/11dependend on the fiber content(Cellulose)

CFF GmbH & Co. KG

Manufacturing process of SMA:

We recommend the following procedure by using

TECHNOCEL, TOPCEL and/or GENICEL

(DAV – German Asphalt Association e.V., December 2000):

......

5 - 15 sec.

approx. 20 sec.

5 - 10 sec.

Mineral

Aggregates

Mineral

Aggregates

and Additives

Bitumen

Post mixing

<------’dry premixing period’---------->I<--------’wet mixing period’------------>

CFF GmbH & Co. KG

- manually or

- automatic dosing systems

Dosage facilities

SMA paving

CFF GmbH & Co. KG

CFF GmbH & Co. KG

SMA paving

CFF GmbH & Co. KG

Skid resistance Stone Mastic Asphalt

To ensure the required grip, it is recommended to spread:

- 1-2 kg/m² dedusted high quality chippings 2/5mm or

- 0,5 - 1 kg/m² crushed sand-chippings mix 1/3mm

The blinding material may be spread with a disk scatterers fitted to a roller. Spread the blinding material on the hot surface course, but not before the second roller pass.

CFF GmbH & Co. KG

Homogeneous gritting of SMA with a disk scatterer fitted to a roller

directionSpreading of crushed

stones

CFF GmbH & Co. KG

Gritting measures

1-2 kg/m² dedusted high quality chippings 2/5mm or0,5 - 1 kg/m² crushedsand-chippings mix 1/3mm

SMA - possible problems

Water comes out of the surface after drying (rain) – possible glace ice during wintertime

Bad skid resistance

Segregation - areas with high bitumen content on the surface (“bitumen bleeding“)

CFF GmbH & Co. KG

bitumen content too high

CFF GmbH & Co. KG

Compaction, which roller?

CFF GmbH & Co. KG

Uneven distribution of bitumen in the mix

CFF GmbH & Co. KG

Bad homogenity of the asphalt mixture

CFF GmbH & Co. KG

Bitumen / Binder

Modification of Bitumen / Asphalt

CFF GmbH & Co. KG

Additivs for modifcation

CFF GmbH & Co. KG

Modification of domestic bitumen by using

GENICEL

CFF GmbH & Co. KG

Changing the main characteristics of

standard bitumen

Ring and ball Penetration

CFF GmbH & Co. KG

Main trends for changing the RaB,

Pen by using GENICEL

45

81,5 73

44

0

20

40

60

80

100

Changing the main characteristics of bitumen by

using GENICEL

– the Ring and Ball point will grow in the range between 35 and 45 °C

– The penetration point will degrease in the range between 25 and 35 1/10mm

– The breaking point (Fraaß) will stay nearly constant in the range of the original bitumen

CFF GmbH & Co. KG

GENICEL

Adhesion to minerals – The adhesion to critical minerals will be

improved

CFF GmbH & Co. KG

Adhesion to minerals

Straight run bitumen GENICEL modified

CFF GmbH & Co. KG

Workability – reduce the mixing temperatures up to

approx. 160°C – the asphalt mix has a very high

compactability Environmental pollution

– reducing the emission of CO2 and other air pollutants

– reducing the use of energy – reduction is up to 20% is possible

GENICEL

CFF GmbH & Co. KG

(1) Bitumen 70 / 100(2) Bitumen PmB 45(3) GENICEL mod. Bitumen

12

3

CFF GmbH & Co. KG

Wheel Tracking Test with different kinds of bitumen [SMA 0/ 8S, chippings 75% , bitumen 7% ]

0

0,5

1

1,5

2

2,5

3

3,5

4

4,5

5

0

10

00

20

00

30

00

40

00

50

00

60

00

70

00

80

00

90

00

10

00

0

11

00

0

12

00

0

13

00

0

14

00

0

15

00

0

16

00

0

17

00

0

18

00

0

19

00

0

20

00

0

amount of overrollings

Ru

t d

epth

in m

m

resistance against rutting – the rut depth measured in the wheel

tracking test device will be minimised – The reduction rate compared with standard

bitumen is minimum 50% Viscosity

– the viscosity can be compared with bitumen 70/100

GENICEL

CFF GmbH & Co. KG

121 134 145

GENICEL

Bitumen 50/70

PmB 45A

CFF GmbH & Co. KG

SMA 0/11 S

2,0%

2,5%

3,0%

3,5%

4,0%

4,5%

5,0%

95 105 115 125 135 145 155 165

Compactiontemperatur [°C]

vo

id c

on

ten

t M

PK

[%

]

CFF GmbH & Co. KG

TOPCEL Pellets

TECHNOCEL 1004-GGranules

CFF‘s products for road construction:

CFF GmbH & Co. KG

GENICEL 2-Component-Pellets (TECHNOCEL-Cellulose fibers + SASOBIT-Bitumen-Modifier)

CFF‘s products for road construction:

CFF GmbH & Co. KG

Fields of application:

l Stone Mastic Asphalt (SMA)

l Open-Porous Asphalt (OPA) or drain asphalt

l special asphalt concrete mix designs

l “ Heavy duty binder courses ”

CFF GmbH & Co. KG

THANK YOU FOR YOUR ATTENTION !

CFF GmbH & Co. KG

CFF GmbH & Co. KG

Arnstädter Str. 2

D – 98708 Gehren

Tel. +49 36783 882-265

Fax +49 36783 882-252

Email: s.schulz@cff.de

Home-Page: www.cff.de