Selected properties of concrete containing municipal solid waste incineration bottom ash (MSWI-BA)

Abstract

Nowadays, remarkable achievements towards the sustainability of our environment. These include the use of recyclable materials to improve the greenness of the concrete by incorporating them in the concrete industry. One of the main concerns for researchers when using new material in concrete is its engineering and durability properties. This study was conducted to investigate the mechanical properties and the durability of concrete when using Municipal Solid Waste Incineration Bottom Ash (MSWIBA) as a replacement for fine aggregate to produce green and sustainable concrete. Two percentages for sand replacement 25% and 50% were used to evaluate the effect of incorporating this material on the concrete compressive strength, density, UPV, total water absorption, and capillary water absorption properties. The water to cement ratio used was 0.45, and the specimens were tested at 7,14, and 28 days. A comparison for the results of concrete specimens with and without MSWI-BA was performed. The results showed that replacing 25% of sand with MSWI-BA has no harmful effect on the compressive strength of the concrete that encourages this strategy. However, using higher replacement percentage 50% decreases sharply the strengths to about 50%. On the other hand, water absorption by total immersion and by capillary increased when replacing sand was with 25% and 50% MSWI-BA. In summary, using 25 % of MSWI-BA as sand replacement is an effective strategy to produce eco-friendly concrete in that it would produce concrete material that has less embodied energy to produce.

A Review on Cementitious Materials Including Municipal Solid Waste Incineration Bottom Ash (MSWI-BA) as Aggregates

“…Baalbaki et al [41] replaced sand with MSWI-BA at 25% and 50% replacement levels in concrete and reported a slight increase at the 25% replacement level and then a significant drop at the 50% replacement level. Similar results were observed elsewhere [89]. .…”

“…Baalbaki et al [41] replaced sand with MSWI-BA at 25% and 50% replacement levels in concrete and reported a slight increase at the 25% replacement level and then a significant drop at the 50% replacement level. Similar results were observed elsewhere [89]. Saad et al [75] treated MSWI-BA by cement solidification prior to use as a partial replacement of NA in concrete and observed a decrease in compressive strength with the utilization of treated MSWI-BA.…”

“…Machaka et al [89] replaced fine aggregates with MSWI-BA at 25% and 50% replacement levels in concrete and reported a slight decrease in the density of the concrete with the increase in MSWI-BA content. The density dropped from 2364 kg/m 3 for the control mix to 2269 kg/m 3 at a 50% replacement level.…”

“…However, the water absorption of the concrete decreased with the increase of the curing age. Machaka et al [89] reported that the water absorption of the concrete slightly increased when replacing sand with MSWI-BA at 25% and 50% replacement levels after 28 days of curing. Saad et al [75] determined the water absorption of concrete including MSWI-BA solidified by cement and noticed that the concrete mixes containing MSWI-BA had much higher water absorption than that containing NA.…”

The Effect of Milled Municipal Solid Waste Incineration Bottom Ash on Cement Hydration and Mortar Properties

“…The lowest densities were found in samples with the highest MSWI BA contents and without additional additives, due to their lower densities compared to cement and a higher evolution of the H 2 gas. Similar trends have been presented in other works [ 45 , 46 ], where the densities decrease with increasing amounts of MSWI BA.…”