On the Performance Analysis and Environmental Impact of Concrete with Coal Fly Ash and Bottom Ash

Rahmat Hadi Suwarno; Arief Sabdo Yuwono; Erizal

doi:10.46604/ijeti.2023.10229

Authors

Rahmat Hadi Suwarno Department of Civil and Environmental Engineering, IPB University, Bogor, Indonesia
Arief Sabdo Yuwono Department of Civil and Environmental Engineering, IPB University, Bogor, Indonesia
Erizal Department of Civil and Environmental Engineering, IPB University, Bogor, Indonesia

DOI:

https://doi.org/10.46604/ijeti.2023.10229

Keywords:

carbon footprint, coal bottom ash, coal fly ash, concrete

Abstract

Coal is a commonly used fuel by coal power plants that produce coal fly ash and coal bottom ash (coal FABA) as byproducts. The latest regulation in Indonesia changes coal FABA classification to non-toxic waste, which opens up its utilization possibility. This paper analyses the coal FABA potential from Suralaya Coal Power Plant as concrete material and its environmental impact. To determine coal FABA potential, the methods used in this paper are slump test, compressive strength test, flexural strength test, and carbon footprint calculation. This paper shows that concrete mixture with coal FABA content has a lower slump value, lower compressive strength, and generally lower flexural strength. Furthermore, the carbon footprint calculation result shows that concrete mixture with coal FABA content has lower CO₂ emissions than conventional concrete. Finally, the result shows that concrete with coal FABA could be used as non-structural concrete.

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