Deformation Behaviour of Geopolymer Mortars with Alkali-reactive Carbonate Aggregate
For understanding the alkali-carbonate reactivity in geopolymer and the mechanism of traditional alkali-carbonate reaction (ACR), the deformation behavior of geopolymer mortar with pure dolomite (YT) and dolomitic limestone from Kingston, Canada (CK) was studied by curing at different
conditions, i.e. room temperature with over 95% relative humidity (RH), 38 RH > 95% and 80 1 mol/L NaOH. Results show that, at the three curing conditions, YT only acts as a filler to slightly reduce the shrinkage of the mortar; The deformation behavior of geopolymer mortar with CK varies
remarkably with the changes in the curing temperature and alkalinity, especially the mortars with CK expand slightly at different curing stages when cured at 38 RH>95% and 80 1 mol/L NaOH; it suggests that the reaction mechanism of CK in geopolymer may be quite different with that in cement
system, and the shrinkage of geopolymer might be compensated by selecting special carbonate aggregate and curing conditions.
Keywords: alkali-carbonate reaction; deformation behavior; expansion; geopolymer; shrinkage compensation
Document Type: Research Article
Affiliations: College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China
Publication date: 01 July 2012
- Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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