Sustainable application of coal bottom ash as fine aggregates in concrete: A comprehensive review

Hamada, Hussein M.; Al-Attar, Alyaa A.; Tayeh, Bassam A.; Yahaya, Fadzil Mat; Adesina, Adeyemi

doi:10.1016/j.cscm.2022.e01109

Cited by 39 publications

(17 citation statements)

References 85 publications

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“…There have been several review studies on the use of FA-BA as a concrete constituent [3842]. It is important to consider the use of bottom ash as a replacement for fine aggregate because it can have a negative effect on the mechanical properties of concrete, such as compressive and tensile strength [38,40]. Utilizing bottom ash as a cementitious material is also challenging due to its lower pozzolanic activity.…”

Section: Literature Reviewmentioning

confidence: 99%

Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

2023

IJATEE

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The combustion process of coal in a steam power plant produces about 5% of fly ash and bottom ash (FA-BA) waste, which is a solid waste material that cannot be burned and can cause environmental pollution. This research aimed to modify lightweight concrete by using fly ash waste as a substitute for Portland cement and bottom ash waste as a substitute for fine aggregate. The lightweight concrete was tested for resistance to hydrochloric acid (HCl) with a potential of hydrogen (pH) range of 6-8 under three test conditions. The percentage of fly ash waste used as a substitute for cement ranged from 10% to 40% of the total weight of cement, while the percentage of bottom ash waste used as a substitute for fine aggregate ranged from 30% to 50% of the total weight of fine aggregate. The test results showed that the lightweight concrete composition with the lightest specific gravity was found in the FL40BO50 mixture with a density of 1.70 gr/cm 3 and a minimum compressive strength of 15.92 MPa. However, the most optimal specific gravity was found in the FL20BO30 mixture. The lightweight concrete with a specific gravity of 1.84 gr/cm 3 and the most optimal compressive strength of 25.17 MPa was obtained. In the test results for HCl resistance, the lightweight concrete with the FL20BO30 mixture experienced the minimum mass loss, while the FL40BO50 mixture experienced the maximum decrease in mass. Under testing conditions 1, the lightweight concrete experienced a mass decrease ranging from 0.36% to 1.61% of the initial mass. Under testing conditions 2, the lightweight concrete decreased in mass by 0.65% to 3.50% of the initial mass. Under testing condition 3, the lightweight concrete experienced a mass decrease ranging from 1.03% to 4.81% of the initial mass. The decrease in mass was due to the formation of microcracks in the lightweight concrete caused by the chloride content in the HCl solution, which attacked the bonding mechanism in the lightweight concrete.

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Section: Literature Reviewmentioning

confidence: 99%

Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

2023

IJATEE

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“…Density at 10% CBA was 2399 kg/m 3 and decreased 7% when CBA was replaced at 50% by volume. Hamada et al [9] observed that the concrete density reduced as the proportion of CBA increased due to the porous formations and lower unit weight of CBA than fine aggregate.…”

Section: Density and Compressive Strength Of Seawater-concrete With 1...mentioning

confidence: 99%

Feasibility study of fine-metakaolin and coal bottom ash as cement and fine aggregate replacement in seawater-mixed concrete

Yeng,

Md Noor,

Che Rahim

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The combination effect of fine-metakaolin (FMK) and coal bottom ash (CBA) as cement and fine aggregate replacement in seawater-concrete was investigated to reduce environmental issues such as carbon emission, global warming, and insufficient water resource. Optimum percentages of 10%, 20% and 30% of fine-metakaolin was determined in Stage 1 through compression strength test. Stage 2 involved testing on mixture with FMK obtained in Stage 1 and 10%, 20%, 30%, 40% and 50% of CBA as the fine aggregate replacement. Nine series of concrete mixtures were prepared to conduct a compressive strength test and water absorption test at 7 and 28 days. It was observed that 10% of FMK and 10% of CBA incorporated with seawater had the highest compressive strength. Water absorption of the seawater-concrete mixed increased as the percentage of the CBA increased. It can be concluded that 10% to 50% replacement of CBA is suitable as the fine aggregate replacement with the substitution of FMK at 10%.

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“…Ultra-high-strength concrete is suitable for constructing longer bridges, tall buildings, and structures exposed to aggressive conditions [ 1 ]. However, the mass of ordinary Portland cement in ultra-high-strength concrete (UHSC) is usually 800 to 1150 kg/m 3 [ 2 ], which is twice or thrice the proportion of conventional cement in traditional concrete [ 3 – 5 ]; the formation of OPC needs a considerable proportion of energy and natural resources [ 6 ], which makes the immense proportion of CO 2 [ 7 ]. Making 1 ton of clinker is projected to need 6.5 to 7 mega-joules of energy and releases nearly [ 8 ] 0.90 to 1.0 tons of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the properties of ultra-high-strength geopolymer concrete with polypropylene fibers and nano-silica

Althoey

Zaid²,

Alsulamy

et al. 2023

PLoS ONE

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Because of the recent progress in materials properties, specifically high-strength concrete, further research is needed to evaluate its suitability, understanding, and performance in the modern-day world. This research aims to enhance the performance of ultra-high-strength geopolymer concrete (UHS-GPC) by adding nano-silica (NS) and polypropylene fibers (PPFs). Three 1%, 2%, and 3% different amounts of PPFs and three NS 5%, 10%, and 15% were utilized in the samples. Various performance parameters of UHS-GPC were evaluated, such as fresh property, compressive strength, modulus of elasticity split tensile, flexural and bonding strength, drying shrinkage, load-displacement test, fracture performance, and elevated temperature. The test outcomes showed that by raising the percentage of PPFs and NS to the allowable limit, the performance of UHS-GPC can be improved significantly. The most improved performance of UHS-GPC was obtained at 2% polypropylene fibers and 10% nano-silica, as the compressive, splitting tensile, flexural. Bond strength was improved by 17.07%, 47.1%, 36.52, and 37.58%, and the modulus of elasticity increased by 31.4% at 56 days. The study showed that the sample with 2% PPFs and 10% NS had excellent performance in the load-displacement test, drying shrinkage, fracture behavior, and elevated temperature. At 750°C elevated temperature, the samples’ strength was reduced drastically, but at 250°C, the modified samples showed good resistance to heat by retaining their compressive strength to some degree. The present work showed the suitability of PPFs and NS to develop ultra-high-strength geopolymer concrete, which can be used as a possible alternate material for Portland cement-based concrete.

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Sustainable application of coal bottom ash as fine aggregates in concrete: A comprehensive review

Cited by 39 publications

References 85 publications

Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

Feasibility study of fine-metakaolin and coal bottom ash as cement and fine aggregate replacement in seawater-mixed concrete

Experimental study on the properties of ultra-high-strength geopolymer concrete with polypropylene fibers and nano-silica

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