Effects of fillers on stability properties of stone matrix asphalt mix

Abstract

Failures in asphalts occurs because of the development of vehicles with high intensity of loads tends to increase in usage of automobiles which results in use of rut resistant Bituminous mixes in the surface course. Rutting and Fatigue cracking are the results of the damage caused due to primary parameters. Cracking can be prevented by maintaining Probable temperature during the preparation of bituminous mix to the laying of mixes. To prevent rutting, the Stone lattice black-top also known as Stone Matrix Asphalt (SMA) can be utilized as a fraction of the bituminous layer. In this study SMA is preferred to check its implementation in all viewpoint such as stability (kg), volume of voids in mineral aggregates (VMA,) deformation (mm), with the usage of different types of Non Conventional fillers which enhances the properties of the mix. Fillers plays a vital role in improving the stability and durability, where as reduction leads to increase voids in the mix. Distinctive fillers like glass powder, magnetite, cement kiln powder and fly ash have been used in the mixes. Twelve sets of test sample were set up by utilizing typical sorts of filler having varied sum in the mixture. Samples prepared at diverse asphalt contents(4.5%,5.5%,6.5%) respectively varying fillers. The Marshall properties obtained for the conventional filler flyash has been set up to exhibit higher stability contrasted with magnetite, glass powder, cement kiln Powder, but have satisfied the minimum requirements. Magnetite filler indicates least deformation at 5.5 % bitumen content and the rate of air voids from the results they are observed to be diminished with the expansion of bitumen substance.