Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetration

This paper describes protective features of concrete used in precast prestressed floor slabs against chloride penetration. HC-500 hollow core slabs are designed for constructing ceilings in skeletal buildings with reinforced concrete. Material and structural protection used in slabs determines the a...

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Main Author: Szweda Zofia
Format: Article
Language:English
Published: EDP Sciences 2018-01-01
Series:MATEC Web of Conferences
Online Access:https://doi.org/10.1051/matecconf/201816305006
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spelling doaj-2ff843596c474ad88bfc9ae920e848f02021-02-02T01:07:35ZengEDP SciencesMATEC Web of Conferences2261-236X2018-01-011630500610.1051/matecconf/201816305006matecconf_matbud2018_05006Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetrationSzweda ZofiaThis paper describes protective features of concrete used in precast prestressed floor slabs against chloride penetration. HC-500 hollow core slabs are designed for constructing ceilings in skeletal buildings with reinforced concrete. Material and structural protection used in slabs determines the acceptable range of using HC slabs, taking into account durability of floors during their normal exploitation. These slabs can be used in buildings where environmental conditions affect them according to the following exposure classes: X0, XC1, XC2, XC3 (according to standards: EN 206-1: 2003 [1], EN 1992-1-1:2004 [2]). Values of diffusion coefficient for concrete collected directly from precast prestressed HC-500 slabs, were determined during short (24h and 48h) tests accelerated by the electric field. In those tests we used a thermodynamic migration model and a reverse equation of chloride migration in concrete. Taking into consideration values of diffusion coefficient and diffusion equation, the time required for chloride concentration to reach critical value for reinforcement and the thickness of reinforcement cover were established under the condition that the structure durability was subjected to the exposure class XD3 (chapter 4 of the standard PN 1992-1-1[2]).https://doi.org/10.1051/matecconf/201816305006
collection DOAJ
language English
format Article
sources DOAJ
author Szweda Zofia
spellingShingle Szweda Zofia
Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetration
MATEC Web of Conferences
author_facet Szweda Zofia
author_sort Szweda Zofia
title Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetration
title_short Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetration
title_full Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetration
title_fullStr Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetration
title_full_unstemmed Analysis of protective features of concrete in precast prestressed floor slabs (HC type) against chloride penetration
title_sort analysis of protective features of concrete in precast prestressed floor slabs (hc type) against chloride penetration
publisher EDP Sciences
series MATEC Web of Conferences
issn 2261-236X
publishDate 2018-01-01
description This paper describes protective features of concrete used in precast prestressed floor slabs against chloride penetration. HC-500 hollow core slabs are designed for constructing ceilings in skeletal buildings with reinforced concrete. Material and structural protection used in slabs determines the acceptable range of using HC slabs, taking into account durability of floors during their normal exploitation. These slabs can be used in buildings where environmental conditions affect them according to the following exposure classes: X0, XC1, XC2, XC3 (according to standards: EN 206-1: 2003 [1], EN 1992-1-1:2004 [2]). Values of diffusion coefficient for concrete collected directly from precast prestressed HC-500 slabs, were determined during short (24h and 48h) tests accelerated by the electric field. In those tests we used a thermodynamic migration model and a reverse equation of chloride migration in concrete. Taking into consideration values of diffusion coefficient and diffusion equation, the time required for chloride concentration to reach critical value for reinforcement and the thickness of reinforcement cover were established under the condition that the structure durability was subjected to the exposure class XD3 (chapter 4 of the standard PN 1992-1-1[2]).
url https://doi.org/10.1051/matecconf/201816305006
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