Characterisation and understanding of Portland cement mortar with different sizes of bottom ash
Source abstract
Abstract
Coal combustion residues are produced in large volumes and have been dumped as waste products over many years. The use of bottom ash (BA) as a partial replacement for Portland cement (PC) is an economical use of this thermal power plant by-product. The study reported here aimed to characterise BA of different sizes for use as 10–40% PC replacement. Chemical and physical characteristics such as chemical composition, phase analysis, microstructure, density and compressive strength were examined. With 10% 63 μm BA, the density slightly decreased while the strength was almost identical to that of the control PC mix. Scanning electron microscopy images revealed the flat and hexagonal shapes of calcium silicate hydrate gel. Calcium carbonate enhanced the hydration process of C3S while the ternary phase diagram of calcium oxide–silicon dioxide–aluminium oxide showed that a mix with 10% BA was in the high-calcium zone.
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Research context
OpenAlex topics: Recycling and utilization of industrial and municipal waste in materials production · Concrete and Cement Materials Research · Recycled Aggregate Concrete Performance
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Center of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), Kangar, Malaysia (corresponding author: hooi.jun.ng88@gmail.com)
Center of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), Kangar, Malaysia; Faculty of Engineering Technology, Universiti Malaysia Perlis (UniMAP), Kangar, Malaysia
Faculty of Engineering Technology, Universiti Malaysia Perlis (UniMAP), Kangar, Malaysia
Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Romania
References (26)
Show source-provided references
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