Bituminous mixes and flexible pavements: an introduction

Publication Year

1992

Document Status

Withdrawn

Abstract

Deals with bituminous mixes and flexible pavements. Bituminous mixes are mixtures of mineral aggregate (stone) particles and a hydrocarbon adhesive used to bind the aggregate together. The main characteristic of the bituminous binder, apart from its waterproofing and adhesive properties, is that it is thermoplastic. This thermoplastic property produces mixes which can deform under applied loads. On roads, transient loads applied by the passage of vehicle wheels are of short duration and road temperatures are sufficiently low for the mixes to be able to accommodate these loadings satisfactorily. Indeed, the mixes are capable of flexing elastically under wheel loadings, enabling them to absorb stresses imposed by traffic without cracking, and contributing to the relative smoothness experienced when travelling on this type of road. For these reasons, a bituminous road is commonly known as a 'flexible' pavement. The popularity of this form of pavement construction is a result of the mixes having good weather resistance and durability, being able to provide good skid-resistance and being usable soon after laying without the need for lengthy curing periods. In addition, bituminous surfacings do not require joints, give smooth riding quality, provide good contrast to road marking materials and are easily and economically maintained.

Document History

Withdrawn.

ISBN

9780952064305

Publisher Information