An experimental study on the hazard assessment and mechanical properties of porous concrete utilizing coal bottom ash coarse aggregate in Korea

Park, Seung Bum; Jang, Young Il; Lee, Jun; Lee, Byung‐Jae

doi:10.1016/j.jhazmat.2008.11.054

Cited by 77 publications

(31 citation statements)

References 5 publications

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“…From an environmental and engineering standpoint, utilization of the bottom ash in cement-based composites is considered to be a favorable application [4,3,[5][6][7]11]. Owing to physical and chemical encapsulation by the cement matrix, the toxic trace elements in bottom ash (including heavy metals and arsenic) can be bound in the composites [8,9,10]. Thus, compared with direct disposal of bottom ash and its geotechnical utilizations, the environmental impacts of bottom ash applied in cement-based composites is significantly lower [13,12].…”

Section: Introductionmentioning

confidence: 99%

Utilization of sieved and ground coal bottom ash powders as a coarse binder in high-strength mortar to improve workability

Kim

2015

Construction and Building Materials

115

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Section: Introductionmentioning

confidence: 99%

Utilization of sieved and ground coal bottom ash powders as a coarse binder in high-strength mortar to improve workability

Kim

2015

Construction and Building Materials

115

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“…Therefore, there is a good correlation to show that the size of bottom ash possesses an ideal quality thereby enhancing the quality of concrete especially in terms of strength. Park et al [27] lead an SEM analysis on the coal bottom ash, and it has been proved that coal bottom ash has a porous surface with many voids. It was also found that the area with voids was not as dense compared to other areas.…”

Section: Physical Propertiesmentioning

confidence: 99%

“…From previous research, the modulus of rupture decreases when fine aggregates are totally replaced with fine or coarse bottom ash. Park et al [27] discovered that the flexural strength of bottom ash concrete tends to reduce all aggregate grading as the bottom ash mixing ratio increases. This means that the fractured section of concrete with bottom ash aggregates shows a flatter surface than normal aggregates [40].…”

Section: Flexural Strengthmentioning

confidence: 99%

A Comprehensive Review on the Properties of Coal Bottom Ash in Concrete as Sound Absorption Material

et al. 2017

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Abstract. The government is currently implementing policies to increase the usage of coal as fuel for electricity generation. At the same time, the dependency on gas will be reduced. In addition, coal power plants in Malaysia produce large amounts of industrial waste such as bottom ash which is collected in impoundment ponds (ash pond). However, millions of tons of coal ash (bottom ash) waste are collected in ponds near power plant stations. Since bottom ash has been classified as hazardous material that threatens the health and safety of human life, an innovative and sustainable solution has been introduced to reuse or recycle industrial waste such as coal bottom ash in concrete mixtures to create a greener and more sustainable world. Bottom ash has the potential to be used as concrete material to replace fine aggregates, coarse aggregates or both. Hence, this paper provides an overview of previous research which used bottom ash as fine aggregate replacement in conventional concrete. The workability, compressive strength, flexural strength, and sound absorption of bottom ash in concrete are reviewed.

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“…Several studies have demonstrated ways of utilizing waste such as bottom ash (Chindaprasirt et al, 2009;Kayabal and Buluş, 2000;Kurama and Kaya, 2008;Park et al, 2009). A study on the leaching behavior of bottom ash and fly ash done by Wang et al (1999) indicated that different elements have different leaching behaviors because of their different properties.…”

Section: Introductionmentioning

confidence: 99%

Leaching kinetics of bottom ash waste as a source of calcium ions

Koech

Everson

Neomagus

et al. 2015

Journal of the Air & Waste Management Association

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Bottom ash is a waste material from coal-fired power plants, and it is known to contain elements that are potentially toxic at high concentration levels when disposed in landfills. This study investigates the use of bottom ash as a partial substitute sorbent for wet flue gas desulfurization (FGD) processes by focusing on its leaching kinetics in adipic acid. This was studied basing on the shrinking core model that was applied to the experimental data obtained by the authors presented at the International Conference on Industrial, Manufacturing, Automation and Mechanical Engineering, Johannesburg, South Africa, November 27-28, 2013) on dissolution of bottom ash. The leaching rate constant was obtained from different reaction variables, namely, temperature, pH, acid concentration, and solid-to-liquid ratio, that could affect the leaching process. The solid sample of bottom ash was characterized at different leaching periods using X-ray diffraction (XRD) and scanning electron microscopy (SEM). It was found that solid-to-liquid ratio had a significant effect on the leaching rate constant when compared with other variables. The leaching kinetics showed that diffusion through the product layer was the rate-controlling step during leaching, and the activation energy for the process was found to be 18.92 kJ/mol.Implications: The use of coal bottom ash waste as a sorbent substitute in wet flue gas desulfurization (FGD) has both economic and environmental advantages. This is because it is a waste from coal-fired thermal power plant and this study has proven that it can leach out a substantial amount of calcium ions for wet FGD process. This will abate anthropogenic pollution due to landfill disposal of bottom ash wastes and also reduce sulfur dioxide emissions.

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An experimental study on the hazard assessment and mechanical properties of porous concrete utilizing coal bottom ash coarse aggregate in Korea

Cited by 77 publications

References 5 publications

Utilization of sieved and ground coal bottom ash powders as a coarse binder in high-strength mortar to improve workability

Utilization of sieved and ground coal bottom ash powders as a coarse binder in high-strength mortar to improve workability

A Comprehensive Review on the Properties of Coal Bottom Ash in Concrete as Sound Absorption Material

Leaching kinetics of bottom ash waste as a source of calcium ions

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