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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23605

Title: Studies on the Alkali–Silica Reaction Rim in a Simplified Calcium–Alkali–Silicate System
Authors: Zheng, Kunpeng
Adriaensens, Peter
De Schutter, Geert
Ye, Guang
Taerwe, Luc
Issue Date: 2016
Citation: Materials, 9(8), p. 1-19 (Art N° 670)
Abstract: This work is intended to provide a better understanding about the properties and roles of the reaction rim in an alkali-silica reaction. A simplified calcium-alkali-silicate system was created to simulate the multiple interactions among reactive silica, alkaline solution and portlandite near the aggregate surface during the formation and evolution of the reaction rim in an alkali-silica reaction. A transport barrier preventing the migration of calcium and silicate through itself was found on the interface between the alkali silicate and the calcium hydroxide. The barrier was mainly composed of calcium alkali silicate with silicon-oxygen organizations of Q(2) and Q(3) according to the results of Si-29 nuclear magnetic resonance, the calcium to silica mole ratio ranging from 0.22 to 0.53 and the alkali to silica ratio ranging from 0.20 to 0.26 based the location of the elemental compositional analysis and the storage period of the system.
URI: http://hdl.handle.net/1942/23605
DOI: 10.3390/ma9080670
ISI #: 000383456800009
ISSN: 1996-1944
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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