TAILIEUCHUNG - Chemical approaches to prevent alkali-silica reaction in concrete – A review

This study synthesizes the use of chemicals to prevent one of common concrete durability problems, alkali-silica reaction (ASR), and can help researchers (i) identify widely used potential chemicals and evaluate these chemical solutions to prevent ASR with proper understanding of mechanisms, and (ii) to identify the research gaps in order to develop guidelines and implementation plan on the use of these chemicals for future research. | Chemical approaches to prevent alkali-silica reaction in concrete A review Engineering Solid Mechanics 6 2018 201-208 Contents lists available at GrowingScience Engineering Solid Mechanics homepage esm Chemical approaches to prevent alkali-silica reaction in concrete A review Kai-Wei Liua Anol Mukhopadhyaya Xijun Shia and Jia-Lin Hsua a Texas A amp M Transportation Institute Texas A amp M University College Station TX 77843 USA A R T I C L EI N F O ABSTRACT Article history This study synthesizes the use of chemicals to prevent one of common concrete durability Received 10 January 2018 problems alkali-silica reaction ASR and can help researchers i identify widely used Accepted 4 June 2018 potential chemicals and evaluate these chemical solutions to prevent ASR with proper Available online understanding of mechanisms and ii to identify the research gaps in order to develop 4 June 2018 Keywords guidelines and implementation plan on the use of these chemicals for future research. Alkali-silica reaction Chemicals Concrete durability 2018 Growing Science Ltd. All rights reserved. 1. Introduction The occurrences of the concrete durability problem alkali-silica reaction ASR have been observed over the years Stanton 2008 Thomas et al. 2013 Liu amp Mukhopadhyay 2014 . ASR has been well known as a chemical reaction between alkali hydroxides in pore solution and the reactive form of silica in aggregates. The product of this reaction is named ASR gel. In presence of sufficient moisture . 80 RH gel absorbs moisture and swells leading to tensile stresses in concrete and eventually resulting in concrete cracks Mukhopadhyay et al. 2009 Mukhopadhyay amp Liu 2014a . The use of fly ash primarily class F ash is the common effective remedial practice to prevent this concrete durability problem Latifee 2016 . However there is a major concern that fly ash with required quality and quantity will not be available to prevent ASR in the long term as both fly ash .

• Cơ khí - Chế tạo máy
• Alkali silica reaction (ASR)
• The use of chemicals
• Concrete durability problems
• Engineering Solid Mechanics
• Widely used potential chemicals