Effect of recycled crushed bricks as additive in pavement material

Abstract

Recycling waste materials has gained its own demand and popularity especially in solving disposal problems, hence creating opportunity for researcher to study the advantage of using recycling materials in their products. This paper studied on the impact of indirect tensile strength(ITS) tests on the characterization of bituminous mixes. It focuses on the Marshall Mix design process to determine the optimum binder content in asphalt mixtures of Hot Mix Asphalt (HMA) with recycled crushed bricks (RCB). Samples were prepared with grading the natural aggregates and RCB according to the AC14 grading limit. At 160°C, the samples were blended with 4-6% bitumen content of grade 60/70 until uniformly mixed. Next, another 18 samples were prepared in accordance with Marshall optimization to analyse the performance of sample by conducting both dry and wet ITS test. 20% and 30% of RCB were added to replace fine aggregates of 1.18 mm to pan sieve. The result shows that the dry method gives a better result of ITS with 20% to 30% of replacement of fine aggregates with RCB. The average maximum load that can be load to the sample was 13.185 kN of load for dry sample whereas the wet sample with 11.23 kN of load.