Renovation of an alkali–aggregate reaction damaged swimming pool

The alkali–aggregate reaction (AAR) is an expansion reaction of the aggregate in concrete caused by the alkalinity of hydrated cement, which may disintegrate concrete. The alkali–silica reaction (ASR) is the most general form of AAR which only rarely causes degradation in Finland. The pool at Tamper...

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Main Authors: Jukka Lahdensivu, Jussi Aromaa
Format: Article
Language:English
Published: Elsevier 2015-12-01
Series:Case Studies in Construction Materials
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2214509515000054
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spelling doaj-e5972bc34d6542f8b8d487c09d07835c2020-11-24T22:48:22ZengElsevierCase Studies in Construction Materials2214-50952015-12-013C1810.1016/j.cscm.2015.04.002Renovation of an alkali–aggregate reaction damaged swimming poolJukka LahdensivuJussi AromaaThe alkali–aggregate reaction (AAR) is an expansion reaction of the aggregate in concrete caused by the alkalinity of hydrated cement, which may disintegrate concrete. The alkali–silica reaction (ASR) is the most general form of AAR which only rarely causes degradation in Finland. The pool at Tampere Swimming Centre was only the third such case in the country. Condition assessment by several parallel methods was used to determine the existence and extent of ASR. A total of 34 samples were drilled from the concrete structures of the swimming pool. The samples were examined by scanning electron microscopy (SEM) and an X-ray diffractometer as well as by thin section analyses and tensile and compressive strength tests of concrete. Based on the assessment, it was decided to repair the damaged concrete and stop the ASR by proper waterproofing. Tensile and compressive strength tests on the concrete indicated that a relatively light renovation method was sufficient because the deterioration of the concrete was still incipient and the target service life of the repairs was only 20–25 years. Self-compacting concrete was determined to be a good solution for concreting the narrow spaces between dense reinforcement. Self-compacting concrete was used also for concreting the splash canals and supporting consoles. The renovation was based on installing proper waterproofing between the concrete surface and the ceramic tiling.http://www.sciencedirect.com/science/article/pii/S2214509515000054Alkali–silica reactionSelf-compacting concreteRenovationWaterproofing
collection DOAJ
language English
format Article
sources DOAJ
author Jukka Lahdensivu
Jussi Aromaa
spellingShingle Jukka Lahdensivu
Jussi Aromaa
Renovation of an alkali–aggregate reaction damaged swimming pool
Case Studies in Construction Materials
Alkali–silica reaction
Self-compacting concrete
Renovation
Waterproofing
author_facet Jukka Lahdensivu
Jussi Aromaa
author_sort Jukka Lahdensivu
title Renovation of an alkali–aggregate reaction damaged swimming pool
title_short Renovation of an alkali–aggregate reaction damaged swimming pool
title_full Renovation of an alkali–aggregate reaction damaged swimming pool
title_fullStr Renovation of an alkali–aggregate reaction damaged swimming pool
title_full_unstemmed Renovation of an alkali–aggregate reaction damaged swimming pool
title_sort renovation of an alkali–aggregate reaction damaged swimming pool
publisher Elsevier
series Case Studies in Construction Materials
issn 2214-5095
publishDate 2015-12-01
description The alkali–aggregate reaction (AAR) is an expansion reaction of the aggregate in concrete caused by the alkalinity of hydrated cement, which may disintegrate concrete. The alkali–silica reaction (ASR) is the most general form of AAR which only rarely causes degradation in Finland. The pool at Tampere Swimming Centre was only the third such case in the country. Condition assessment by several parallel methods was used to determine the existence and extent of ASR. A total of 34 samples were drilled from the concrete structures of the swimming pool. The samples were examined by scanning electron microscopy (SEM) and an X-ray diffractometer as well as by thin section analyses and tensile and compressive strength tests of concrete. Based on the assessment, it was decided to repair the damaged concrete and stop the ASR by proper waterproofing. Tensile and compressive strength tests on the concrete indicated that a relatively light renovation method was sufficient because the deterioration of the concrete was still incipient and the target service life of the repairs was only 20–25 years. Self-compacting concrete was determined to be a good solution for concreting the narrow spaces between dense reinforcement. Self-compacting concrete was used also for concreting the splash canals and supporting consoles. The renovation was based on installing proper waterproofing between the concrete surface and the ceramic tiling.
topic Alkali–silica reaction
Self-compacting concrete
Renovation
Waterproofing
url http://www.sciencedirect.com/science/article/pii/S2214509515000054
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