Investigation of marshal] characteristics & durability of glass powder incorporated dense-graded asphalt

Abstract

Asphalt concrete is one the most widely used paving mix and its durability is a key issue with regaids to long term pavement performance. The Cantabro durability test is one of the most practical and implementable test used to assess the durability of open graded asphalt mixes. However, previous studies have validated its superior viability in dense graded mixes as well. The durability as well as performance of asphaltic mixes is widely dependent on the nature and quantity of mineral filler. This study identifies the effect of incorporating waste glass powder as mineral filler over the Marshall Properties and durability of dense graded asphalt concrete mix. A suitable number of trail mixes were designed as Marshall mix design method having stone dust as conventional filler and glass powder as alternative filler. At optimum binder contents of both mixes, Cantabro durability tests were performed to measure their durability against raveling. It was observed that, although glass powder improve the Marshall properties of asphalt concrete mixes as compared to conventional filler, however, it also impaired the durability of same mixes against raveling.