A Fact Finding Review of Performance Specifications in 2002

This document is an awareness-raising review of the current state of the art for performance specifications. It provides insight into three important areas of performance specification and presents the responses to an international questionnaire on the subject. The three important areas of discussion are appropriate definition; initial and whole life cost implications, and the use of warranty periods in the procurement contract.

Limits of use of natural soils, specifications and controls in earthworks

During 2000-2003 C12 activity, it was decided to be interested in the limits of use of the soils in the earthworks through the various Member States of the committee and simultaneously to analyse the control methods developed to guarantee the good completion of the work. C12 has considered interesting the mutual knowledge of gathered experiences, although difference of national contexts does not permit easy, direct transposition of the progresses from one country to another. Nevertheless this [...]

Flexible Pavement - Evolution of Specifications and Quality Systems to Deliver Performance

Specifications for bituminous materials in highway construction are continuously evolving. At an early stage, they were more intuitive and based on engineering judgement. They were called method or recipe specifications in which the client specified the materials and procedures that the contractor had to use. In the 70s, they evolved to end-result specifications in which the contractor started to assume responsibilities for quality controls and construction methods. The clients then concentrated [...]

International Symposium on Subdrainage in Roadway Pavements and Subgrades

Out of print As is common knowledge in the transportation community, proper functioning of roadways is largely dependent on adequate drainage, both at the surface and in the subsurface. The accumulation of excessive water under pavements typically results in a reduced bearing capacity, leading to distress and premature failure of pavements. Drainage-related problems usually manifest themselves as pavement rutting, cracking, and increased road roughness. The World Road Association (PIARC) [...]

Modified Binders, Binders with Additives and Special Bitumen

Theme 1: Introduction on the various modified bitumens, special bitumens and additives used in road construction and on the main tests for their characterisation Theme 2: Compatibility of bitumens and modifiers Theme 3: Elastomeric modified binders Theme 4: Plastomeric modified binders Theme 5: Modified and special emulsions Theme 6: Binders with additives Theme 7: Special bitumens Theme 8: Contribution of modified binders, special binders and additives to the performance of asphaltic concrete [...]