Sulphate resistance of air entrained mortars with admixture of fly ashes

Sulphate resistance of air entrained mortars with admixture of fly ashes

The effects of entrained air on sulphate resistance of fly ash blended cements mortars long term immersed in Na2SO4 solution were investigated. The expansion strains and decrease in strength of air entrained mortars were faster than those of non-air entrained ones. It was found with SEM and XRD anal...

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Bibliographic Details
Main Author: Monika Jaworska
Format: Article
Language:English
Published: Lublin University of Technology 2015-03-01
Series:Budownictwo i Architektura
Subjects:
sulphate attack
air voids
air entrainment
mortars
fly ashes
Online Access:https://ph.pollub.pl/index.php/bia/article/view/1666
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spelling doaj-51988a0d8a6c4b20b50f34efc110d67b2020-11-25T02:00:30ZengLublin University of TechnologyBudownictwo i Architektura1899-06652544-32752015-03-0114110.35784/bud-arch.1666Sulphate resistance of air entrained mortars with admixture of fly ashesMonika Jaworska0Department of Civil Engineering and Architecture, Kielce University of TechnologyThe effects of entrained air on sulphate resistance of fly ash blended cements mortars long term immersed in Na2SO4 solution were investigated. The expansion strains and decrease in strength of air entrained mortars were faster than those of non-air entrained ones. It was found with SEM and XRD analyses that ettringite and gypsum were the main sulfate attack products. The SEM studies of mortars microstructure showed that the highest amount of ettringite observed occurred in air voids partially filled with this phase. The sulphate resistance of AE and nAE mortars containing high or low calcium fly ash blended cements was significantly higher compared to plain OPC mortar. https://ph.pollub.pl/index.php/bia/article/view/1666sulphate attackair voidsair entrainmentmortarsfly ashes
collection DOAJ
language English
format Article
sources DOAJ
author Monika Jaworska
spellingShingle Monika Jaworska
Sulphate resistance of air entrained mortars with admixture of fly ashes
Budownictwo i Architektura
sulphate attack
air voids
air entrainment
mortars
fly ashes
author_facet Monika Jaworska
author_sort Monika Jaworska
title Sulphate resistance of air entrained mortars with admixture of fly ashes
title_short Sulphate resistance of air entrained mortars with admixture of fly ashes
title_full Sulphate resistance of air entrained mortars with admixture of fly ashes
title_fullStr Sulphate resistance of air entrained mortars with admixture of fly ashes
title_full_unstemmed Sulphate resistance of air entrained mortars with admixture of fly ashes
title_sort sulphate resistance of air entrained mortars with admixture of fly ashes
publisher Lublin University of Technology
series Budownictwo i Architektura
issn 1899-0665
2544-3275
publishDate 2015-03-01
description The effects of entrained air on sulphate resistance of fly ash blended cements mortars long term immersed in Na2SO4 solution were investigated. The expansion strains and decrease in strength of air entrained mortars were faster than those of non-air entrained ones. It was found with SEM and XRD analyses that ettringite and gypsum were the main sulfate attack products. The SEM studies of mortars microstructure showed that the highest amount of ettringite observed occurred in air voids partially filled with this phase. The sulphate resistance of AE and nAE mortars containing high or low calcium fly ash blended cements was significantly higher compared to plain OPC mortar.
topic sulphate attack
air voids
air entrainment
mortars
fly ashes
url https://ph.pollub.pl/index.php/bia/article/view/1666
work_keys_str_mv AT monikajaworska sulphateresistanceofairentrainedmortarswithadmixtureofflyashes
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