AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

Dennis Rossmann

RPF - May 2005

AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

Ultra thin friction course layers have been constructed in Europe since 1990. Tens of millions of m2 have been paved.

Most are produced under Agrément or similar certification

USE OF UTFC LAYER

Surfacing Type

71%

10%

6%

2%

11%

UTFC

Perous Aspahlt

Surface seal

CRCP

Asphalt concrete

Toll concession route in FranceLength – 1821 kmsAADT – 24300ADTT – 20%

AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

A system (layer + bond coat)

UTFC – seal or asphalt????

AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

First Introduced in SA in 1998

Currently 2 proprietary products being produced under international licence

SA designed and manufactured products also available.

AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

- PPGS ???

Products have differing material properties and design requirements!

AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

To develop performance criteria where, for proprietary and innovative construction products, there are no relevant standards

AGRÈMENT PERFORMANCE CRITERIA FOR THIN LAYER ASPHALT

Industry task team

Joe Odhiambo Agrèment SA

Joop van Wamelen Agrèment SA

Basie Nothnagel ‘Agrèment’

Kim Jenkins Stellenbosch Univiersity

Piet Myburg SABITA

Elizabeth Sadzik Gautrans

Dennis Rossmann SANRAL

Mervyn Henderson PAWC

Pat Olivier SAACE

Gary Swart SAACE

Derek Pretorius SAACE

Julian Wise/Mike Winfield SAFCEC

Wynand Steyn CSIR

Benoit Verhaege CSIR

CERTIFICATION PROGRAMME: TERMS OF REFERENCE (1)

- Both manufacturers and applicators must be included in the certification process (no split

responsibility)- Aggregate producers need to be included- Certification process must accommodate possible different designs- Procurement process for these products must be transparent to all stakeholders

Client /Road owner’s perspective:

CERTIFICATION PROGRAMME: TERMS OF REFERENCE (2)

- Certification must be for specific uses of the product and must highlight inappropriate applications- Quality management will be responsibility of manufacturer as well as applicator (either can be certificate holder)- Certification will be conducive to consensus w.r.t performance guarantee requirements – certification will be an adjunct to the performance guarantee- Certification will bring clarity on the durability or functional lifetime of the product.- The certification process must be as cheap as possible

(size of SA market)

Applicant or certificate holder’s perspective:

AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

International Scene

BBA guidelines to serve as basis for Agrément SA performance criteria

CERTIFICATION PROCESS

Selected issues to be addressed:- What is defined as thin-layer asphalt?- European test methods adapted to SA standards- Wheel tracking or MMLS testing- Inclusion of mobile plants (project specific quarries)- Appropriate application of products:

- Support stiffness/condition/porosity- Traffic classes- Surface texture (pre-treatment requirements)

- Quality assurance plans- Performance property assessments

CERTIFICATION PROGRAMME

TASK DATE

Working group to compile scope and brief for compilation of working document

20 May 2005

Agrément to invite quotations 30 May 2005

Agrément to seek funding 15 June 2005

Award project to service provider 15 July 2005

Draft Agrément performance criteria 14 October 2005

Distribution of draft criteria 31 October 2005

Recommendations from task team RPF in November 2005

AGRÈMENT CERTIFICATION OF THIN LAYER ASPHALT

- UTFC layers:not “new” - Certification: not “new”- Certification will enhance “quality”- Certification will promote transparent

procurement

Conclusions: