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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 | Source: | 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. | Keywords: | alkali-silica reaction; reaction rim; calcium alkali silicate; transport barrier | Document URI: | http://hdl.handle.net/1942/23605 | e-ISSN: | 1996-1944 | DOI: | 10.3390/ma9080670 | ISI #: | 000383456800009 | Rights: | © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2017 |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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Published-materials-09-00670.pdf | Published version | 10.26 MB | Adobe PDF | View/Open |
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