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
