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Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement

When a crack occurs under an installed waterproofing material and moves due to environmental effects (freeze–thaw, settlement, vibration, dead load, etc.), waterproofing materials without adequate elongation or tensile strength properties may break and tear. To enable the selection of materials with...

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Autores principales: Oh, Kyu-hwan, Kim, Soo-yeon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8399433/
https://www.ncbi.nlm.nih.gov/pubmed/34442949
http://dx.doi.org/10.3390/ma14164429
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author Oh, Kyu-hwan
Kim, Soo-yeon
author_facet Oh, Kyu-hwan
Kim, Soo-yeon
author_sort Oh, Kyu-hwan
collection PubMed
description When a crack occurs under an installed waterproofing material and moves due to environmental effects (freeze–thaw, settlement, vibration, dead load, etc.), waterproofing materials without adequate elongation or tensile strength properties may break and tear. To enable the selection of materials with proper response against the strain that occur during crack movement, this study proposes and demonstrates a new evaluation method for determining and comparing strain concentration of waterproofing materials under the effect of concrete crack movement. For the proposed testing method and demonstration, three common types of waterproofing material types were selected for testing, poly-urethane coating (PUC), self-adhesive asphalt sheet (SAS) and composite asphalt sheet (CAS). Respective materials are installed with strain gauges and applied onto a specimen with a separated joint that undergoes concrete crack movement simulation. Each specimen types are subject to repeated movement cycles, whereby strain occurring directly above the moving joint is measured and compared with the strain occurring at the localized sections (comparison ratio which is hereafter referred to as strain concentration ratio). Specimens are tested under four separate movement length conditions, 1.5 mm, 3.0 mm, 4.5 mm and 6.0 mm, and the results are compared accordingly. Experimental results show that materials with strain concentration ratio from highest to lowest are as follows: PUC, SAS and CAS.
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spelling pubmed-83994332021-08-29 Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement Oh, Kyu-hwan Kim, Soo-yeon Materials (Basel) Article When a crack occurs under an installed waterproofing material and moves due to environmental effects (freeze–thaw, settlement, vibration, dead load, etc.), waterproofing materials without adequate elongation or tensile strength properties may break and tear. To enable the selection of materials with proper response against the strain that occur during crack movement, this study proposes and demonstrates a new evaluation method for determining and comparing strain concentration of waterproofing materials under the effect of concrete crack movement. For the proposed testing method and demonstration, three common types of waterproofing material types were selected for testing, poly-urethane coating (PUC), self-adhesive asphalt sheet (SAS) and composite asphalt sheet (CAS). Respective materials are installed with strain gauges and applied onto a specimen with a separated joint that undergoes concrete crack movement simulation. Each specimen types are subject to repeated movement cycles, whereby strain occurring directly above the moving joint is measured and compared with the strain occurring at the localized sections (comparison ratio which is hereafter referred to as strain concentration ratio). Specimens are tested under four separate movement length conditions, 1.5 mm, 3.0 mm, 4.5 mm and 6.0 mm, and the results are compared accordingly. Experimental results show that materials with strain concentration ratio from highest to lowest are as follows: PUC, SAS and CAS. MDPI 2021-08-07 /pmc/articles/PMC8399433/ /pubmed/34442949 http://dx.doi.org/10.3390/ma14164429 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Oh, Kyu-hwan
Kim, Soo-yeon
Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement
title Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement
title_full Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement
title_fullStr Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement
title_full_unstemmed Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement
title_short Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement
title_sort strain concentration ratio analysis of different waterproofing materials during concrete crack movement
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8399433/
https://www.ncbi.nlm.nih.gov/pubmed/34442949
http://dx.doi.org/10.3390/ma14164429
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