期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 83, 期 -, 页码 26-33出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.02.024
关键词
Shale; Slag; Thermal treatment; Alkaline activation; Binder; Geopolymer; Rheometry
资金
- CENTEM project [CZ.1.05/2.1.00/03.0088]
- ERDF as part of the Ministry of Education, Youth and Sports OP RDI programme
- CENTEM PLUS from the Ministry of Education, Youth and Sports under the National Sustainability Programme I [LO1402]
This paper is aimed at investigating the properties of calcined shale-slag as an alternative alkali-activated constructional binder hardened by geopolymerization reaction with sodium silicate solution. Focus is put on possibilities of thermal treatment in temperature range of 500-1000 degrees C and investigation of structural changes. These investigations were done by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (FTIR), measurement of specific surface area, pozzolanic activity and mechanical strength of prepared geopolymer mixtures. Reaction rates were measured by small amplitude dynamic rheometry as a relatively new method for investigation of geopolymerization process. The best compression strength of 82.52 MPa and highest reactivity, according to the pozzolanic activity and dynamic rheometry, was achieved by thermal treatment at 600 degrees C for duration of 4 h. (C) 2015 Elsevier Ltd. All rights reserved.
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