期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 55, 期 -, 页码 38-45出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2014.01.040
关键词
Metakaolin; Fly ash; Geopolymer; Bending; Compression; High temperature; Fire resistance
资金
- National Natural Science Foundation of China [51108193]
- Fundamental Research Funds for the Central Universities [2013ZZ0029]
- State Key laboratory of Subtropical Architecture Science, South China University of Technology [2011ZC30, 2013ZC21]
- Michigan State University
This paper presents results from experiments on geopolymer binders, composing of metakaolin (MK) and fly ash (FA) blend as a precursor, specially developed for fire resistance applications. Bending and compression tests were conducted at ambient temperature and after exposure to high temperatures on three batches of geopolymer specimens. Based on mechanical property tests and thermogravimetric analysis, an optimum MK FA proportion required in geopolymers for achieving optimum performance both at ambient and high temperatures is developed. Data from strength tests is utilized to illustrate that MK FA based geopolymer specimens exhibit comparable bending and compressive strength as that of ordinary Portland cement specimens both at ambient temperature and after exposure to high temperatures. Thus, MK FA based geopolymers offer a feasible alternative to conventional Portland cement in practical building applications. (C) 2014 Elsevier Ltd. All rights reserved.
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