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Alkali-silica reactivity of lightweight aggregate: A brief overview

The alkali-silica reaction (ASR) phenomenon is one of the most severe conditions which could deteriorate concrete. While extensive studies have been done on the reactivity of normal weight aggregate, the ASR mechanism related to the use of lightweight aggregate is not well understood. The paper revi...

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Main Authors:	Mo, Kim Hung, Ling, Tung-Chai, Tan, Tee How, Leong, Geok Wen, Yuen, Choon Wah, Shah, Syed Nasir
Format:	Article
Published:	Elsevier 2021
Subjects:	T Technology (General) TH Building construction
Online Access:	http://eprints.um.edu.my/28233/
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id	my.um.eprints.28233
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spelling	my.um.eprints.282332022-03-05T02:14:51Z http://eprints.um.edu.my/28233/ Alkali-silica reactivity of lightweight aggregate: A brief overview Mo, Kim Hung Ling, Tung-Chai Tan, Tee How Leong, Geok Wen Yuen, Choon Wah Shah, Syed Nasir T Technology (General) TH Building construction The alkali-silica reaction (ASR) phenomenon is one of the most severe conditions which could deteriorate concrete. While extensive studies have been done on the reactivity of normal weight aggregate, the ASR mechanism related to the use of lightweight aggregate is not well understood. The paper reviews published findings with regards to the reactivity of lightweight aggregate. The beneficial effect of internal voids within the aggregate to accommodate reaction product seems to be shared by most of the studied lightweight aggregates. However, different types of lightweight aggregate were found to have differing behaviour with regards to ASR. Clay-based lightweight aggregates such as expanded clay and shale are reported to be non-reactive and can be utilized to reduce expansions in concrete experiencing ASR whereas highly siliceous aggregates such as expanded glass and perlite could exhibit certain degree of reactivity, though in most cases it was not deleterious. Further investigations are nevertheless required, especially to fully understand the ASR mechanism in various other types of lightweight aggregate. (C) 2020 Elsevier Ltd. All rights reserved. Elsevier 2021-02-08 Article PeerReviewed Mo, Kim Hung and Ling, Tung-Chai and Tan, Tee How and Leong, Geok Wen and Yuen, Choon Wah and Shah, Syed Nasir (2021) Alkali-silica reactivity of lightweight aggregate: A brief overview. Construction and Building Materials, 270. ISSN 0950-0618, DOI https://doi.org/10.1016/j.conbuildmat.2020.121444 <https://doi.org/10.1016/j.conbuildmat.2020.121444>. 10.1016/j.conbuildmat.2020.121444
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	T Technology (General) TH Building construction
spellingShingle	T Technology (General) TH Building construction Mo, Kim Hung Ling, Tung-Chai Tan, Tee How Leong, Geok Wen Yuen, Choon Wah Shah, Syed Nasir Alkali-silica reactivity of lightweight aggregate: A brief overview
description	The alkali-silica reaction (ASR) phenomenon is one of the most severe conditions which could deteriorate concrete. While extensive studies have been done on the reactivity of normal weight aggregate, the ASR mechanism related to the use of lightweight aggregate is not well understood. The paper reviews published findings with regards to the reactivity of lightweight aggregate. The beneficial effect of internal voids within the aggregate to accommodate reaction product seems to be shared by most of the studied lightweight aggregates. However, different types of lightweight aggregate were found to have differing behaviour with regards to ASR. Clay-based lightweight aggregates such as expanded clay and shale are reported to be non-reactive and can be utilized to reduce expansions in concrete experiencing ASR whereas highly siliceous aggregates such as expanded glass and perlite could exhibit certain degree of reactivity, though in most cases it was not deleterious. Further investigations are nevertheless required, especially to fully understand the ASR mechanism in various other types of lightweight aggregate. (C) 2020 Elsevier Ltd. All rights reserved.
format	Article
author	Mo, Kim Hung Ling, Tung-Chai Tan, Tee How Leong, Geok Wen Yuen, Choon Wah Shah, Syed Nasir
author_facet	Mo, Kim Hung Ling, Tung-Chai Tan, Tee How Leong, Geok Wen Yuen, Choon Wah Shah, Syed Nasir
author_sort	Mo, Kim Hung
title	Alkali-silica reactivity of lightweight aggregate: A brief overview
title_short	Alkali-silica reactivity of lightweight aggregate: A brief overview
title_full	Alkali-silica reactivity of lightweight aggregate: A brief overview
title_fullStr	Alkali-silica reactivity of lightweight aggregate: A brief overview
title_full_unstemmed	Alkali-silica reactivity of lightweight aggregate: A brief overview
title_sort	alkali-silica reactivity of lightweight aggregate: a brief overview
publisher	Elsevier
publishDate	2021
url	http://eprints.um.edu.my/28233/
_version_	1735409546249109504
score	13.222552

Alkali-silica reactivity of lightweight aggregate: A brief overview

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