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http://dx.doi.org/10.6111/JKCGCT.2014.24.1.015

Characterization of geopolymer made of municipal solid waste incineration ash slag  

Kim, Yongsung (Department of Advanced Materials Engineering, Kyonggi University)
Kang, Seunggu (Department of Advanced Materials Engineering, Kyonggi University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.24, no.1, 2014 , pp. 15-20 More about this Journal
Abstract
In this research, the geopolymer was fabricated using municipal solid waste incineration ash (denoted as MSWIA) slag and alkali activator, NaOH and its properties were analyzed. Particularly, the effects of NaOH molarity, particle size of MSWIA, and liquid/solids ratio on the compressive strength of geopolymers were investigated. The compressive strength of geopolymers fabricated increased with finer grain size of MSWIA, and optimum value of the liquid/solids ratio was identified as 0.13. As the molarity of the NaOH increased, the compressive strength of geopolymers was increased. Even more the 20 M of NaOH, but the strength was not increased. The calcium aluminum silicate and calcium aluminum silicate hydrate zeolites were generated in the geopolymer fabricated with more than 20 M of NaOH, with some unreacted silica and unknown crystals remained. The highest compressive strength, 163 MPa, of geopolymer was appeared at conditions of curing temperature $70^{\circ}C$, and 20 M of NaOH, indicating that the high concentration of NaOH accelerates the geopolymer reaction and dense microstructure. The high-strength geopolymer fabricated in the present study is expected to contribute significantly to develop the field of cement alternative substances and to improve the recycling rate of MSWIA slag.
Keywords
Geopolymer; Municipal solid waste incineration ash; Slag; NaOH; Zeolite;
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Times Cited By KSCI : 3  (Citation Analysis)
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