PHYSICAL AND RHEOLOGICAL PROPERTIES OF HYPER MODIFIED BITUMENS BY SBS

Abstract

The asphalt is the important component to link the mineral materials of the road, the asphalt as a viscoelastic material, their mechanical and thermal characteristics insufficient for our region (Southern Algeria), the traditional asphalt which used in Algeria is hard but has his short life, For this reason impose Algeria and other country in the last year to improve the traditional materials of pavement concrete, by adding the polymers that allow to reduce the sensitivity part to temperature and viscous, and increases its flexibility and rigidity. In this study, we modified the asphalt by 5% we called standard modified bitumen and 7.5% noted as the hyper modified bitumen, in this modification we used an SBS, and follow the influence of polymer on asphalt viscosity, their mechanical and rheological characters changes using DMA test. also other tests carried out showed that adding of 7.5% by SBS, increase the rigidity, elasticity and reduce thermal susceptibility, in addition can predict the behavior of asphalt on the road.