Marshall properties of hot mix asphalt which partly contains Municipal Solid Waste Incinerator (MSWI) ash to substitute filler aggregate is evaluated. On testing the physical properties of HMA constituent (bitumen, fine and coarse aggregates, and cement) revealed they complied with the minimal standards for use in HMA. The MSWI ash was subjected to x-ray fluorescence, which showed it belongs to pozzolana of class C. The stability, flow and volumetric properties of HMA for use in binder course of flexible pavement was conducted using the Marshall mix design method. The HMA contains a range of bitumen concentrations (from 4.5 to 6.5%) at different percentage replacements of cement filler with MSWI ash of (0, 10, 20, 30, and 40%). Hot mix asphalt with up to 40% MSWI and 6.5% binder content has the maximum stability value, according to the Marshall Stability findings. However, the stability values of all the other replacements were more than the 3.5 kN limit set by (FMWH, 2016). Additionally, the flow values at every MSWI ash content are within the minimum requirements for usage in binder courses. It can be inferred from the testing and analysis done in this study that HMA containing up to 40% of MSWI ash by weight of filler is applicable to sustainably producing hot mix asphalt
Key words: Hot Mix Asphalt, Marshall Method, Bitumen, municipal solid waste incinerator (MSWI) ash, Filler.
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