Semi-Rigid Pavements

The first chapter deals with terminology. Chapter II explains why one may be led to choose a semi-rigid pavement from all the various types available, and chapter III describes the various possible designs of these pavements. Chapter IV then discusses the methods used in designing semi-rigid pavements, giving examples of the pavement structures used in various countries. This is followed by a description of the constituents of the materials treated with hydraulic binders, the methods used in choosing [...]

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 [...]