Enhancing the durability of concrete made of concrete recyclate by additives and admixtures

The aim of this research is to find an optimum combination of silicate admixtures and epoxy dispersion additives which would positively influence the durability and mechanical properties of concretes made of concrete recyclate. The durability of concrete is dependent on its cover layer permeability...

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Main Author: Michal Stehlík
Format: Article
Language:English
Published: Vilnius Gediminas Technical University 2014-03-01
Series:Journal of Civil Engineering and Management
Subjects:
Online Access:http://journals.vgtu.lt/index.php/JCEM/article/view/3123
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spelling doaj-5028ee937b1f48b492aa2cb1a781aa4e2021-07-02T02:10:20ZengVilnius Gediminas Technical UniversityJournal of Civil Engineering and Management1392-37301822-36052014-03-0120210.3846/13923730.2013.802708Enhancing the durability of concrete made of concrete recyclate by additives and admixturesMichal Stehlík0Department of Building Testing, Faculty of Civil Engineering, TU of Brno, Veverí 95, 602 00 Brno, Czech Republic The aim of this research is to find an optimum combination of silicate admixtures and epoxy dispersion additives which would positively influence the durability and mechanical properties of concretes made of concrete recyclate. The durability of concrete is dependent on its cover layer permeability and also on the overall permeability of concrete recyclate. The cover layer permeability was evaluated by means of three methods, namely the air permeability method TPT and two methods of measuring water permeability, GWT and ISAT. Fine silicate admixtures and dispersion additives influence the air and water permeability of concrete made of concrete recyclate in different ways. The dose of 10% of microsilica or 30% of slag or fly ash decreases the air permeability of concrete. Water permeability, on the other hand, is decreased by adding a dose of 12% of pure epoxy dispersion. As regards improving the mechanical properties of concrete made of concrete recyclate, it seems to be promising to use a combination of 30% of slag admixture or 10% of microsilica admixture with 12% of epoxy dispersion additive. However, the price of admixtures and additives is relatively high. That is why additive enhanced concretes made of concrete recyclate are intended for special purposes. http://journals.vgtu.lt/index.php/JCEM/article/view/3123concrete recyclatedurabilitypermeabilityepoxy dispersionpenetrationslag
collection DOAJ
language English
format Article
sources DOAJ
author Michal Stehlík
spellingShingle Michal Stehlík
Enhancing the durability of concrete made of concrete recyclate by additives and admixtures
Journal of Civil Engineering and Management
concrete recyclate
durability
permeability
epoxy dispersion
penetration
slag
author_facet Michal Stehlík
author_sort Michal Stehlík
title Enhancing the durability of concrete made of concrete recyclate by additives and admixtures
title_short Enhancing the durability of concrete made of concrete recyclate by additives and admixtures
title_full Enhancing the durability of concrete made of concrete recyclate by additives and admixtures
title_fullStr Enhancing the durability of concrete made of concrete recyclate by additives and admixtures
title_full_unstemmed Enhancing the durability of concrete made of concrete recyclate by additives and admixtures
title_sort enhancing the durability of concrete made of concrete recyclate by additives and admixtures
publisher Vilnius Gediminas Technical University
series Journal of Civil Engineering and Management
issn 1392-3730
1822-3605
publishDate 2014-03-01
description The aim of this research is to find an optimum combination of silicate admixtures and epoxy dispersion additives which would positively influence the durability and mechanical properties of concretes made of concrete recyclate. The durability of concrete is dependent on its cover layer permeability and also on the overall permeability of concrete recyclate. The cover layer permeability was evaluated by means of three methods, namely the air permeability method TPT and two methods of measuring water permeability, GWT and ISAT. Fine silicate admixtures and dispersion additives influence the air and water permeability of concrete made of concrete recyclate in different ways. The dose of 10% of microsilica or 30% of slag or fly ash decreases the air permeability of concrete. Water permeability, on the other hand, is decreased by adding a dose of 12% of pure epoxy dispersion. As regards improving the mechanical properties of concrete made of concrete recyclate, it seems to be promising to use a combination of 30% of slag admixture or 10% of microsilica admixture with 12% of epoxy dispersion additive. However, the price of admixtures and additives is relatively high. That is why additive enhanced concretes made of concrete recyclate are intended for special purposes.
topic concrete recyclate
durability
permeability
epoxy dispersion
penetration
slag
url http://journals.vgtu.lt/index.php/JCEM/article/view/3123
work_keys_str_mv AT michalstehlik enhancingthedurabilityofconcretemadeofconcreterecyclatebyadditivesandadmixtures
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