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A Study on the Alkali-Silica Reaction of Binary Blended Geopolymer Mortar
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 Title & Authors
A Study on the Alkali-Silica Reaction of Binary Blended Geopolymer Mortar
Kim, Sung-Hoon; Kim, Young-Su;
The purpose of this study is to investigate the alkali-silica reaction through the addition of reactive aggregate in the alkali-activated geopolymer mortar. This study also carried out to analyse the behavior of these alkaline materials in the presence of reactive aggregate. The test method included mortar-bar method to measure the rate of expansion of the mortar bar specimens and morphological analysis and determining composition of the alkali-silica reaction products by using scanning electron microscopy (SEM) and energy dispersive x-ray (EDX). As a result, it was shown that the rate of expansion of the alkali-activated geopolymer mortars changed. At day 14, geopolymer mortar appeared to be safe with less than 0.1%. After the accelerated test, SEM analysis showed the presence of alkali-silica gel and rim around the aggregate and cement paste, According to the EDX, the reaction products decreased markedly as alkali-activated ground granulated blast furnace slag was used. In addition, the study on improving the quality of alkali-activated mortar bar by substituting other materials of mineral admixture is needed to assure of the durability properties of concrete.
Geopolymer;Alkali-silica reaction;Alkali activator;Polymerization;
 Cited by
A.F Jimenez, F. Puertas. (2000). "The alkali-silica reaction in alkali-activated granulated slag mortars with reactive aggregate", Cement and Concrete Research

Choi, D.U (2010). "Concrete and Environment" Journal of Korea Concrete Institute, Vol.54, No.2, pp.153

Hong, S.G (2013). "A Study on the property of geopolymer concrete with mineral admixtures", Sejong University, 5

Jeong, E.C (2009). "Effectiveness of Copper Slag in Reducing Alkali-Silica Reaction Expansion", Pusan National University, 44

Jun, S.S (2004). "The Effect of Meta-Kaolin Replacement on Alkali-Silica Reaction" Journal of Korea Concrete Institute, Vol.16 No.1, 360-363