The Usage of Organic Waste in Porous Asphalt

Abstract

Porous asphalt is a mixture of asphalt with a low proportion of fine aggregate to obtain high air void content, which would create a water drainage path inside the pavement to be channelled into the drainage system. Usually, the materials used as filler are relatively expensive, such as Portland cement and lime, and hence, it is necessary to look for other cheaper alternative materials, such as organic waste. This study aims to determine the effect of using organic waste as a filler in porous asphalt mixtures on the Marshall and Permeability tests results. The organic wastes chosen were used coffee grounds (7%, 8%, 9%), tofu dregs (7%, 8%, 9%), sawdust (7%, 8%, 9%), and coconut fibre (4%, 5%, 6%). The porous asphalt in this study was prepared based on the Australian Asphalt Pavement Association (AAPA) standard. The results showed that the best outcome came from using 7% of sawdust on the porous asphalt mixture.