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Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature
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Document Title
Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature
Author
Azimi EA, Abdullah MMA, Vizureanu P, Salleh MAAM, Sandu AV, Chaiprapa J, Yoriya S, Hussin K, Aziz IH
Name from Authors Collection
Affiliations
Universiti Malaysia Perlis; GH Asachi Technical University; National Institute Research & Development Environmental Protection INCDPM; National Science & Technology Development Agency - Thailand; National Metal & Materials Technology Center (MTEC)
Type
Article
Source Title
MATERIALS
Year
2020
Volume
13
Issue
4
Open Access
Green Published, gold
Publisher
MDPI
DOI
10.3390/ma13041015
Format
Abstract
A geopolymer has been reckoned as a rising technology with huge potential for application across the globe. Dolomite refers to a material that can be used raw in producing geopolymers. Nevertheless, dolomite has slow strength development due to its low reactivity as a geopolymer. In this study, dolomite/fly ash (DFA) geopolymer composites were produced with dolomite, fly ash, sodium hydroxide, and liquid sodium silicate. A compression test was carried out on DFA geopolymers to determine the strength of the composite, while a synchrotron Micro-Xray Fluorescence (Micro-XRF) test was performed to assess the elemental distribution in the geopolymer composite. The temperature applied in this study generated promising properties of DFA geopolymers, especially in strength, which displayed increments up to 74.48 MPa as the optimum value. Heat seemed to enhance the strength development of DFA geopolymer composites. The elemental distribution analysis revealed exceptional outcomes for the composites, particularly exposure up to 400 degrees C, which signified the homogeneity of the DFA composites. Temperatures exceeding 400 degrees C accelerated the strength development, thus increasing the strength of the DFA composites. This appears to be unique because the strength of ordinary Portland Cement (OPC) and other geopolymers composed of other raw materials is typically either maintained or decreases due to increased heat.
Keyword
dolomite | fly ash | Geopolymer | Micro-XRF | strength development | temperature exposure
Funding Sponsor
Centre of Excellent Geopolymer and Green Technology (CeGeoGTech), UniMAP; European Union [PRI-GeoC-689857]
License
CC BY
Rights
Authors
Publication Source
WOS