期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 125, 期 -, 页码 450-457出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2016.08.076
关键词
Less early reactive fly ash; Early reactive calcined clay; Dissolution/hydrolysis; Experimental/theoretical heat released; Compressive strength
资金
- C. V Raman International Fellowship for African Researches from Department of Science and Technology
- Ministry of External Affairs, India
The roles of addition of calcined clay (CC) to fly ash and fly ash to CC, on the reactivity, compressive strength, structural and microstructural properties of geopolymers were investigated. Fly ash-CC-based geopolymers containing 0, 25, 50 and 75% fly ash were synthesised using Na2SiO3/NaOH as an activator. X-ray Florescence, XRD, FTIR, ICC and SEM/EDX were applied to characterise source materials, study geopolymerisation processes and geopolymer properties. Calcined clay accelerated dissolution/hydrolysis of fly ash, while fly ash controlled the exothermic reaction that accompanied alkaline dissolution/hydrolysis of CC. The combined roles led to the production of geopolymer with improved properties and compressive strength of 36.7 MPa at 28 days. (C) 2016 Elsevier Ltd. All rights reserved.
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