Coal Bottom Ash As a Concrete Ingredient: Review

Baig, Aasif M.; Varghese, Valsson

doi:10.2139/ssrn.3370497

Cited by 3 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…India produces 30 million tons of CBA per year (4), the USA and Europe produce 14 million and 4 million tons of CBA, respectively [3], and Malaysia produces 8.5 million tons [5]. CBA disposal in ponds threatens the environment and human health since the harmful constituents contaminate groundwater; therefore, using CBA as a replacement in concrete mixes reduces its effect on the environment and human health [6]. Using bottom ash as an aggregate replacement can aid the economy [7].…”

Section: Introductionmentioning

confidence: 99%

Determining Optimum Coal Bottom Ash Content for Sustainable Concrete Infrastructure

Menda,

Poudel,

Useldinger-Hoefs

et al. 2024

Preprint

View full text Add to dashboard Cite

Coal bottom ash (CBA) is a byproduct of coal-burning power plants. This material can be used as a fine aggregate replacement in concrete to reduce global natural material depletion. Concrete usage is increasing rapidly; subsequently, the industry’s carbon footprint is increasing. Using CBA in the construction industry will reduce the technical and economic problems associated with power plants by reducing solid waste. This project aimed to determine if adding new sustainable materials, such as CBA, to concrete will reduce natural raw material usage, energy consumption, and greenhouse gas emissions while improving performance. This study included two projects: comparing increased CBA content to the two-control project and determining the optimum content based on the compressive strength. The optimum CBA content is 50%, which reduces fine aggregate usage in a concrete mix by 50% while maintaining equivalent or better concrete strength than a pure Portland concrete mix without CBA. The air content of the concrete mix containing % CBA decreased with increased CBA content and compressive strength, possibly due to the spacing factor of the voids in the mix and CBA’s porous and fineness behavior. The CBA optimum content had a unit weight lower than the controls for both projects, which makes the CBA mix a lightweight concrete. Using this material can significantly reduce natural material usage and environmental harm by reducing CBA waste disposal and improving concrete performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Determining Optimum Coal Bottom Ash Content for Sustainable Concrete Infrastructure

Menda,

Poudel,

Useldinger-Hoefs

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Fly ash and bottom ash are the main coal combustion by-products derived from thermoelectric power plants, at approximately 80% and 20%, respectively [1,2]. They are used globally in the concrete industry, in construction, in geotechnical applications, etc.…”

Section: Introductionmentioning

confidence: 99%