Microstructural characterization and mechanical properties of bottom ash mortar
Document Type
Article
Publication Date
1-1-2018
Abstract
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.
Keywords
Bottom ash, Fine aggregate replacement, Compressive strength, Microstructure, Cement, Reactivity
Publication Title
Journal of Cleaner Production
Divisions
fac_eng
Funders
University of Malaya under postgraduate research funds: PG233-2015A and RP034C-15AET
Volume
170
Publisher
Elsevier