Mechanical properties of the asphaltic mixtures using bakelite in flexible pavement

Abstract

This research aims to study the mechanical properties of standardized asphalt concrete in flexible pavement road compared to asphalt concrete that replaced the Bakelite aggregates at ratios of 0, 50, 75, 90 and 100% by weight. Asphalt concrete samples were prepared and incubated for 14 days, and then the Marshall method, dhs408-32 or ASTM D 1559, was tested. It was found that the optimum of the percent binder of the asphalt concrete from natural aggregates was 7.9% with a density of 2.510 g/ml and the stability value of 2310 lbs. Examples of replaced the aggregate by Bakelite are AB50, AB75, AB 90 and AB100 were required more binder to 8% 8.1% 8.4% 8.5%, respectively. The densities were reduced to 1.733, 1.362, 1.312 and 1.304 g/ml, respectively. The stability values were reduced to 1738, 1588, 1480 and 608 lds, respectively. The flow values at the optimum percent binder increases with more replacement. The study found that AB50 using CMS - 2h of 8% gave the stability of 1738 lbs which higher than the standard requirement of 1600 lbs and can be used for the road shoulder applications and suitable for pavement repair such as the deep patching and the skin patching. The cost is 1.27 bahts/g which less than AB0, which costs 1.35 bahts/g, and also it’s more 1.48 times working volume than AB0. The effective of this research respond to the problem of correct waste management and efficient use of resources according to the circular economy principle.