Comparative Study On Suitability Of Crumb Rubber And Waste Marble Dust As Filler Material On Hot Mix Asphalt Pavement

Abstract

Globally, waste materials from construction and industry have been increasingly utilized as alternative raw materials in asphalt mixtures. One of this wastage materials are waste marble dust (WMD) and crumb rubber (CR) during utilized and processing of cutting, shaping, polishing and tires destroyed are huge amount of wastages produced. In line with this one of the main problems in the construction of asphalt paving mixture is quality of material used, insufficient amount of qualified filler. To overcome this problem, it is important to come across alternative filler material that can address this gap which is easily available. Thus, this study was expanding the mindfulness about the present issues of materials waste reuse and utilization in order to reduce the environmental pollution, decrease construction costs, conserve natural resources. Hence, the main objective of this study is to investigate the potential suitability of WMD and CR to replace CSD. In this study to prepare HMA mixture materials like different size of aggregate, 60/70 bitumen, CSD, WMD and CR are used and laboratory test like material quality test, engineering properties of HMA and moisture susceptibility was done to achieve the objective. Based on this totally one hundred twenty (120) specimens are prepared. Hence three different serial asphalt concrete samples are produced using CSD in different dosages 4.5, 5.5, and 6.5% as mineral filler with five different bitumen content (4.3, 4.8, 5.3, 5.8 and 6.3%) and three samples for each. bitumen content was selected by using MS-2 design method with curve plotting and common range selecting this were conducted for the best fit selected 4.85% optimum bitumen content at its corresponding 5.5% filler content. The Marshall Properties of control mix design at optimum filler content was 11.55 kN, 3.21 mm, 2.343 g/cm3 , 4.2%, 14% and 72.5% for stability, flow, bulk specific gravity, air void, VMA and VFA respectively. Partial replacement of CSD was done with WMD and CR at replacement of 0, 20, 40, 60, 80 and 100 % and 0, 5, 10, 15, 20 and 25% by the mass of CSD respectively. The optimum potential replacement of CR and WMD result finding shows 15% and 100% respectively as filler in HMA. The result of tensile strength ratio (TSR) at optimum of 100% CSD, 100% WMD and 15% CR results are 85.61, 86.49 and 84.12%, respectively. Therefore, WMD are better resistance to moisture effects, Followed the mixes prepared CR is lowest moisture resistance as compared with CSD fillers