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Title: Use of waste glass as sand in mortar: Part II - Alkali-silica reaction and mitigation methods
Authors: Du, H.
Tan, K.H. 
Keywords: Alkali-silica reaction
Fiber reinforcement
Lithium compounds
Issue Date: Jan-2013
Source: Du, H., Tan, K.H. (2013-01). Use of waste glass as sand in mortar: Part II - Alkali-silica reaction and mitigation methods. Cement and Concrete Composites 35 (1) : 109-117. ScholarBank@NUS Repository.
Abstract: Waste glass may be used in concrete provided that the potential deleterious expansion caused by alkali-silica reaction (ASR) could be mitigated. In this study, the influence of glass content, color and particle size on ASR expansion of mortar was determined by the accelerated mortar bar method. Two approaches to control ASR expansion were investigated for green, brown and clear glass sand mortar. They were: (1) by replacing cement with pozzolans, that is, 30% fly ash, 60% GGBS, 10% silica fume, or 20% glass powder; (2) by adding a suppressor, that is, plain steel fibers, and lithium chloride and lithium carbonate compounds. Test results showed that the ASR expansion increased with higher glass content in the case of clear glass sand mortar, but would decrease with increasing content for green and brown glass sand mortar. The ASR expansion also decreased with smaller glass particle size, regardless of glass color. Fly ash and GGBS were the most effective in mitigating ASR expansion, followed by silica fume, steel fibers and lithium compounds. © 2012 Elsevier Ltd. All rights reserved.
Source Title: Cement and Concrete Composites
ISSN: 09589465
DOI: 10.1016/j.cemconcomp.2012.08.029
Appears in Collections:Staff Publications

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