Innovative Pavement Design

The sub-group 2 of the PIARC Technical Committee on Road Pavements (C7/8) includes 24 representatives belonging to 18 countries. The task assigned to this group was to identify, analyse and recommend innovative pavement typologies corresponding to needs really expressed by the different countries and the different national, regional and local road network contexts. The aim was to describe the most appropriate choices for favouring the spirit of creativity inherent in innovation as well as the best [...]

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) [...]