Increasing the Stability of Asphalt Concrete Mixture Using Crumb Rubber

Abstract

Stability is a measure of the strength of an asphalt mixture in resisting deformation due to loading. If a road construction structure cannot withstand the existing load, it will result in road damage that endangers road users. This study aims to improve the stability of the asphalt concrete mixture with the use of crumb rubber. Crumb rubber is used because it has good resistance and elasticity. The research was conducted experimentally by making test objects in the laboratory. In this study, five variations crumb rubber (2%, 4%, 6%, 8%, and 10% of the weight asphalt mixture) were carried out with the size of the powder retained on a 40 sieve. Marshall test and analysis of volumetric was carried out to determine the characteristics of the asphalt-concrete mixture. The results showed that the highest Marshall stability was obtained at 10% crumb rubber with a stability value of 1422 kg. The use of rubber powder can significantly increase the strength and quality of the asphalt-concrete mixture. Thus, crumb rubber can be used, and this percentage can be used as a reference in the manufacture of asphalt-concrete mixtures in order to obtain good road pavement quality.

Optimizing Performance Asphalt Concrete Hot Rolled Sheet– Wearing Course (HRS-WC) Using Chitosan Powder

“…In general, the addition of filler will affect the elasticity properties of the mixture and sensitivity in asphalt-concrete mixtures, which increases stability. Still, the addition of large amounts of filler will result in a brittle mixture, whereas a mixture with low filler content will produce a soft mixture in hot weather [5]. More and more research is starting to focus on applying various types of solid waste materials to replace natural mineral powders with sustainable materials in asphalt mixtures [6].…”