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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Vilnius Gediminas Technical University
2014-03-01
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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.
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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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1721343692266012672 |