From waste to resource: Evaluating the possibility of incinerator bottom ash composites for geotechnical applications

Kumar, Sanjeev; Singh, Dharmender

doi:10.1007/s13762-023-04919-4

Cited by 5 publications

(1 citation statement)

References 35 publications

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“…Some of the studies have also investigated the positive effect of nanoclay in asphalt mixture [ 21 , 22 ] and potential use of those recycling materials in geo-applications [ 23 , 24 ]. Particularly, ash has been used in stabilizing subgrade soils of pavement systems [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Combined Effect of Municipal Solid Waste Incineration Bottom Ash and Waste Shingle in Hot Mix Asphalt

Park,

Golestani,

Nam

et al. 2023

Materials

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This study investigated the positive effect of the combined use of recycled asphalt shingles (RASs) and municipal solid waste incineration (MSWI) bottom ash (B.A.) in asphalt concrete, which contributes to enhanced sustainability in pavement engineering. In addition, unlike traditional approaches that employ individual recycling material in hot mix asphalt (HMA), the combined use of the two waste materials maximizes the mechanical performance of the asphalt mixture. The addition of RAS (with 30–40% aged binder) as an additive generally enhances the strength/stiffness of the asphalt mixture. The high porosity/absorption of MSWI BA results in an additional amount of liquid asphalt binder in the mixture. As an admixture, RAS could supply the additional asphalt binder in the mixture when MSWI BA is used as an aggregate replacement. This research was conducted in two phases: (1) to examine the effect of MSWI BA alone and its optimal asphalt content (OAC), and (2) to assess the combined effect of B.A. and RAS in HMA. Multiple laboratory testing methods were employed for the mechanical performance investigation, including the Marshall stability test, rutting test, and indirect tensile test. The testing results show that the 20% B.A. replacement exhibits the best performance and that it requires an additional asphalt binder of 1.1%. For the combined use of MSWI BA and RAS, 5% RAS shows the best mechanical performance. All mixtures that contain the B.A. and RAS show greater strength than the control specimen (regular HMA).

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