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 Tens of millions of m 2 have been paved. Most are produced under Agrément or similar certification

USE OF UTFC LAYER Toll concession route in France Length – 1821 kms AADT – ADTT – 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 OdhiamboAgrèment SA Joop van Wamelen Agrèment SA Basie Nothnagel‘Agrèment’ Kim JenkinsStellenbosch Univiersity Piet MyburgSABITA Elizabeth SadzikGautrans Dennis RossmannSANRAL Mervyn HendersonPAWC Pat OlivierSAACE Gary SwartSAACE Derek PretoriusSAACE Julian Wise/Mike WinfieldSAFCEC Wynand SteynCSIR Benoit VerhaegeCSIR

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 TASKDATE Working group to compile scope and brief for compilation of working document 20 May 2005 Agrément to invite quotations30 May 2005 Agrément to seek funding15 June 2005 Award project to service provider15 July 2005 Draft Agrément performance criteria14 October 2005 Distribution of draft criteria31 October 2005 Recommendations from task teamRPF 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: