By : Russell Clayton

1
COMPARATIVE LABORATORY TESTING OF BITUMINOUS
BINDERS

• By Russell Clayton
• Presented By David Rose
• NINHAM SHAND
• CONSULTING ENGINEERS
• AND
• MATERIALS LABORATORY

2
Aim of the Project

• Carry out inter laboratory testing to establish
  the variability of the test results between
  laboratories
• To develop some degree of confidence from the
  results that are obtained from various
  laboratories throughout the country
• Attempt to obtain some degree of confidence in
  the bituminous product placed on the road

3
Laboratories Contributing To The Project

• NINHAM SHAND MATERIALS LABORATORY CAPE TOWN
• COLAS BITUMEN LABORATORY CAPE TOWN
• MATROLAB CAPE TOWN
• SIMLAB CAPE TOWN
• ROADLAB CAPE TOWN
• SRT DURBAN
• SRT PRETORIA
• TOSAS GAUTENG
• BITUGUARD GAUTENG
• SOILLAB CAPE TOWN
• SOILLAB PRETORIA

4
Binders Tested to Date

• B8 80/100 Penetration Grade Bitumen ex
  Caltex Refinery Cape Town
• SBR Modified Hot Applied Modified Binder using
  80/100 Caltex binder

5
Analysis of RMB3 Results

• Penetration
• Softening Point
• Ductility at 10 degrees Celsius
• Elastic Recovery at 10 degrees Celsius
• Viscosity at 135 degrees Celsius
• Stability (RB)
• Adhesion at 5 degrees Celsius
• Adhesion at 50 degrees Celsius

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Penetration Target 60-90
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Softening Point Target 50 deg celsius min
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Ductility at 10 degrees celsius min 100cm
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Elastic Recovery at 10 degrees celsius 50 min
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Viscosity at 135 degrees celsius 1.0min
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Stability (RB) 2max
12
Adhesion at 5 degrees celsius 90 min
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Adhesion at 50 degrees celsius 100 min
14
Rolling Thin Film Oven Tests (RTFOT)

• The results of the after RTFOT results have been
  received
• These have not been included in this report back
  and will be reported on in another forum

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Conclusions

• Softening Point - 3degrees
• Penetration -7 12 from mean of 73
• Ductility All results in excess 100 required
• Elastic RecoveryAll greater than 50 Required,
  mean 60
• ViscosityAll above min of 1,0 range 1,1 to 2,4
• Stability Large variations 1 to 26 , should not
  exceed 2!!
• Adhesion 5degRange 54 to 100 ,should be greater
  than 90!!
• Adhesion50degRange 99 to 100 ,should be greater
  than 100

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Conclusions contd

• There are large variations in some of the
  test results even with the routine tests like
  PENETRATION and SOFTENING POINT
  
• Some of the test results show large
  variations but the product is within the
  specification
• A proficiency testing program is required to
  improve the level and confidence of testing

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THE END