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Feedback to RPF – SANS 308 Review Process . Johan Muller Road Pavement Forum Task Team Leader. Feedback to RPF - SANS 308 Review Process . Meeting held 15 November 2007 Agenda. Feedback to RPF - SANS 308 Review Process . SectorCompanyName Primary ProducerSaprefMike Zacharias

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Feedback to RPF – SANS 308 Review Process

Johan Muller

Road Pavement Forum Task Team Leader


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Feedback to RPF - SANS 308 Review Process

  • Meeting held 15 November 2007

  • Agenda


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Feedback to RPF - SANS 308 Review Process

SectorCompanyName

Primary ProducerSaprefMike Zacharias

NatrefJacques Van Heerden

EnrefDaniel Mashatola

CalrefSimon Coe

Primary MarketerMasanaThomas Pringle

MasanaDes O’Brien

ShellBob Hornsey

TotalBasil Jonsson

SasolPieter Goosen

ChevronChris Viljoen

Secondary producersColasKobus Louw

TosasJohan Muller

ClientsSANRALDennis Rossmann

GPTRWElzbieta Sadzik

Applicators/contractorsSpray PaveKevin Spence

Tar SprayRobin Dryburgh

Roadmac SurfacingKevan Rocher

ConsultantsVela VKEArthur Taute

Vela VKESimon Kotze

WSP SADouglas Judd

CSIRAdrian Bergh

Frank Netterberg


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Feedback to RPF - SANS 308 Review Process

BACKGROUND

  • LAST REVIEW 1971

  • 2004 CAPSA ID ENVIRONMENTAL NEED TO DISCONTINUATION OF TAR PRODUCTS

  • 2006TAR PRIMES AND PRE-COATING FLUIDS DISCONTINUED

  • SASOL CARBO-TAR CLOSED JUNE 2007

  • MC 30 DOES NOT PENETRATE

    AND DRY QUICK ENOUGH

    (ESPECIALLY IN COLDER WEATHER)

  • MC70 & MC800 NO LONGER MANUFACTURED DUE TO LOW MARKET DEMAND

  • RC NO LONGER USED


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Feedback to RPF - SANS 308 Review Process

MC 30

DENSE BASES

STABILISED BASES

POOR PENETRATION

AFTER 10 DAYS

ESPECIALLY

IN COLDER

WEATHER

CONDITIONS



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Feedback to RPF - SANS 308 Review Process

NEW DEVELOPMENTS

  • DUE TO PROBLEMS ASSOCIATED TO POOR PENETRATION AND LONG DRYING TIME R&D FOLLOWED

    AIM:FIND ALTERNATIVES THAT PERFORM BETTER THAN MC30

  • PRODUCT MUST BE MANUFACTURED

    PREFERABLE AT PRIMARY PRODUCER LEVEL TO ENSURE:

    • CONSISTENT QUALITY

    • SAFER PRODUCTION ENVIRONMENT

    • PROTECT WORKERS

    • ENSURE GOOD GOVERNANCE

    • NO HEATING REQUIRED




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Properties of Cutback Bitumen MC10

(introduction of a new low viscosity primer)




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MC30 @ 0.8 Practiceℓ / m2

MC30 @ 0.5 ℓ / m2

COMPARISONS UNDER CONTROLLED CONDITIONS


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IBE @ 0.8 Practiceℓ / m2

IBE @ 0.5 ℓ / m2

COMPARISONS UNDER CONTROLLED CONDITIONS


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MC10 @ 0.8 Practiceℓ / m2

MC10 @ 0.5 ℓ / m2

COMPARISONS UNDER CONTROLLED CONDITIONS


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An unstable Practice

emulsion prime

@ 0.8 ℓ / m2

Another unstable

emulsion prime

@ 0.8 ℓ / m2

COMPARISONS UNDER CONTROLLED CONDITIONS


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Stable Practice

Tosas QDP

@ 0.8 ℓ / m2

MC 15 @ 0.8 ℓ / m2

COMPARISONS UNDER CONTROLLED CONDITIONS


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Feedback to RPF - SANS 308 Review Process Practice

Current Status – MANUFACTURING

  • ONLY NATREF manufactures MC10

  • OTHER LOCAL PRIMARY PRODUCERS

    • Volumes driven

    • Storage tanks is an issue

  • INVERT BITUMEN EMULSION AVAILABLE

  • EMULSION PRIMES NOW ALSO USED MORE EXTENSIVELY

    THIS TASK TEAM ONLY LOOKS AT THE CUTBACK SPECIFICATION


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Feedback to RPF - SANS 308 Review Process Practice

Current Status – PRIME APPLICATIONS

  • Issues associated to Priming – Dr Netterberg

    • CTB

      • curing - cementation process

      • Carbonisation

  • Dense crushed stone bases

    • Penetration requirement?

  • ETB – no prime required only tack?

  • TAKE COGNISANCE OF:

    • DE-LAMINATION / DEBONDING - Prof Hugo


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Feedback to RPF - SANS 308 Review Process Practice

Task team proposes to the RPF

  • Introduce MC10 product on TRIAL BASIS

  • NO AMENDMENT TO SANS 308, YET!

  • DEVELOPMENT OF A PRIME MATRIX

    • DIFFERENT PRIMES

    • DIFFERENT BASES

    • EFFECT ON CURING

  • BEST PRACTICE GUIDELINE IN PROCESS OF DEVELOPMENT

    Initiative of major client bodies – Mr Rossmann


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    Feedback to RPF - SANS 308 Review Process Practice

    Acknowledgement & Thanks


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    Zero Tolerance for Speeding Practiceand trucks driving in fast lanes this December


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