Microstructural characterization and mechanical properties of bottom ash mortar

Hashemi, Sajedeh Sadat Ghazizadeh and Mahmud, Hilmi and Djobo, Jean Noel Yankwa and Tan, Chee Ghuan and Ang, Bee Chin and Ranjbar, Navid (2018) Microstructural characterization and mechanical properties of bottom ash mortar. Journal of Cleaner Production, 170. pp. 797-804. ISSN 0959-6526, DOI https://doi.org/10.1016/j.jclepro.2017.09.191.

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Official URL: https://doi.org/10.1016/j.jclepro.2017.09.191


Coal Bottom Ash (CBA) is one of the widely-produced residues of coal incineration in thermal power plants. The annual extraction of such a huge amount of waste needs a massive transfer field, which constitutes a threat to the environment. However, the utilization of such residue as a fine aggregate in concrete can be an environmentally-friendly opportunity. Hence, the main purpose of this paper is to evaluate the microstructure and mechanical properties of the usage of BA as a fine aggregate replacement in mortar mixtures. It is observed that BA has a reactive fraction with pozzolanic characteristics. This provides stronger mortar when a medium volume of the material (up to 40%) is substituted. In addition, the CBA based mixture can be classified as lightweight concrete. The compressive strength value of the specimen using 40% CBA at 56 days was 55 MPa, which reached the same strength limit of control mortar mixture.

Item Type: Article
Funders: University of Malaya under postgraduate research funds: PG233-2015A and RP034C-15AET
Uncontrolled Keywords: Bottom ash; Fine aggregate replacement; Compressive strength; Microstructure; Cement; Reactivity
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 08 Aug 2019 08:04
Last Modified: 08 Aug 2019 08:04
URI: http://eprints.um.edu.my/id/eprint/21922

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