Composition of Alkali–Silica Reaction Products in Laboratory and Field Concrete

Tapas, MJ; Vessalas, K; Thomas, P; Gowripalan, N; Sirivivatnanon, V

Composition of Alkali–Silica Reaction Products in Laboratory and Field Concrete

Tapas, MJ Vessalas, K

Thomas, P

Gowripalan, N

Sirivivatnanon, V

Permalink

Publisher:: Springer Nature
Publication Type:: Chapter
Citation:: Nanotechnology in Construction for Circular Economy, 2023, 356 LNCE, pp. 27-36
Issue Date:: 2023-01-01

Closed Access

	Filename	Description	Size
	978-981-99-3330-3_5.pdf		570.78 kB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Tapas, MJ
dc.contributor.author	Vessalas, K https://orcid.org/0000-0003-3948-5212
dc.contributor.author	Thomas, P https://orcid.org/0000-0001-6962-2121
dc.contributor.author	Gowripalan, N https://orcid.org/0000-0001-6930-2056
dc.contributor.author	Sirivivatnanon, V https://orcid.org/0000-0003-1901-6064
dc.date.accessioned	2023-11-09T00:58:32Z
dc.date.available	2023-11-09T00:58:32Z
dc.date.issued	2023-01-01
dc.identifier.citation	Nanotechnology in Construction for Circular Economy, 2023, 356 LNCE, pp. 27-36
dc.identifier.isbn	9789819933297
dc.identifier.uri	http://hdl.handle.net/10453/173254
dc.description.abstract	This study investigated the composition of alkali–silica reaction (ASR) products formed in mortar and concrete that underwent accelerated ASR testing using two test methods: the accelerated mortar bar test (AMBT) and the simulated pore solution immersion test (SPSM). The composition of the ASR products formed in the accelerated tests was compared with those in a 25-year old bridge in New South Wales demolished due to ASR. Results showed that the ASR products inside an aggregate contained calcium (≈20%), silicon (≈60%), and alkalis (≈20%) regardless of the ASR test method used. The ASR products in the AMBT sample only contained sodium, whereas the ASR products in the SPSM test and the demolished bridge both contained significant amounts of sodium and potassium, which indicated that the type of alkali in the ASR product is largely affected by the dominant alkali in the pore solution. However, considering that the total alkali content (Na + K) in the ASR products was similar regardless of the ASR test method used, this suggests that the total alkali content has more influence on the rate of expansion than the type of alkali. The composition of the ASR products also notably varied depending on the location in the concrete. ASR products closer to the cement paste had a higher calcium and lower alkali content than those inside an aggregate, which suggests that the calcium as well as the alkali content of the ASR products plays a significant role in the degree of ASR expansion.
dc.language	en
dc.publisher	Springer Nature
dc.relation.ispartof	Nanotechnology in Construction for Circular Economy
dc.relation.ispartofseries	Lecture Notes in Civil Engineering
dc.relation.isbasedon	10.1007/978-981-99-3330-3_5
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Composition of Alkali–Silica Reaction Products in Laboratory and Field Concrete
dc.type	Chapter
utslib.citation.volume	356 LNCE
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2023-11-09T00:58:31Z
pubs.publication-status	Published
pubs.volume	356 LNCE

Abstract:

This study investigated the composition of alkali–silica reaction (ASR) products formed in mortar and concrete that underwent accelerated ASR testing using two test methods: the accelerated mortar bar test (AMBT) and the simulated pore solution immersion test (SPSM). The composition of the ASR products formed in the accelerated tests was compared with those in a 25-year old bridge in New South Wales demolished due to ASR. Results showed that the ASR products inside an aggregate contained calcium (≈20%), silicon (≈60%), and alkalis (≈20%) regardless of the ASR test method used. The ASR products in the AMBT sample only contained sodium, whereas the ASR products in the SPSM test and the demolished bridge both contained significant amounts of sodium and potassium, which indicated that the type of alkali in the ASR product is largely affected by the dominant alkali in the pore solution. However, considering that the total alkali content (Na + K) in the ASR products was similar regardless of the ASR test method used, this suggests that the total alkali content has more influence on the rate of expansion than the type of alkali. The composition of the ASR products also notably varied depending on the location in the concrete. ASR products closer to the cement paste had a higher calcium and lower alkali content than those inside an aggregate, which suggests that the calcium as well as the alkali content of the ASR products plays a significant role in the degree of ASR expansion.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/173254