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Influence of coal ash on the concrete properties and its performance under sulphate and chloride conditions

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Abstract

This study investigated the influence of coal bottom ash (CBA) on the concrete properties and evaluate the effects of combined exposure of sulphate and chloride conditions on the concrete containing CBA. During concrete mixing, cement was replaced with CBA by 10% of cement weight. Initially, concrete samples were kept in normal water for 28 days. Next, the specimens were moved to a combined solution of 5% sodium sulphate (Na2SO4) and 5% sodium chloride (NaCl) solution for a further 28 to 180 days. The experimental findings demonstrated that the concrete containing 10% CBA (M2) gives 12% higher compressive strength than the water cured normal concrete (M1). However, when it was exposed to a solution of 5% Na2SO4 and 5% NaCl, gives 0.2% greater compressive strength with reference to M1. The presence of 10% CBA decreases the chloride penetration and drying shrinkage around 33.6% and 29.2% respectively at 180 days. Hence, this study declared 10% CBA as optimum that can be used for future research.

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Acknowledgements

The writers also gratefully acknowledge the support of Mehran University of Engineering and Technology, Pakistan.

Materials availability

Locally available materials were used in this study.

Funding

This study was supported by the Universiti Tun Hussein Onn Malaysia and the Ministry of Education Malaysia through the Fundamental Research Grant Scheme (FRGS) Vot No. FRGS/1/2018/TK01/UTHM/02/3.

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Authors and Affiliations

Authors

Contributions

• Sajjad Ali Mangi: Preparation of original draft, experimental performance, analysis.

• Mohd Haziman Wan Ibrahim: Supervision, methodology.

• Norwati Jamaluddin: Review and proofreading.

• Mohd Fadzil Arshad: Review.

• Shabir Hussain Khahro: Review and editing.

• Ramadhansyah Putra Jaya: Review.

Corresponding author

Correspondence to Mohd Haziman Wan Ibrahim.

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Conflict of interest

The authors declare no competing interests.

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Mangi, S.A., Wan Ibrahim, M.H., Jamaluddin, N. et al. Influence of coal ash on the concrete properties and its performance under sulphate and chloride conditions. Environ Sci Pollut Res 28, 60787–60797 (2021). https://doi.org/10.1007/s11356-021-15006-x

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  • DOI: https://doi.org/10.1007/s11356-021-15006-x

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