THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENT
The deterioration mechanism of concrete with mineral admixtures subjected to drying-wetting cycles in a 10% sodium sulphate solution was studied. Plain concrete without fly ash addition, concrete with 10%, 20% and 30% fly ash addition, and a concrete with 20% fly ash and 30% slag addition were used....
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University of Chemistry and Technology, Prague
2019-04-01
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doaj-deeb8b466e2d4f7ab31bd59ad86c58a52020-11-25T02:08:50ZengUniversity of Chemistry and Technology, PragueCeramics-Silikáty0862-54681804-58472019-04-0163214915610.13168/cs.2019.000610.13168/cs.2019.0006.20190917122243THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENTLei Jiang0Ditao Niu College of Civil Engineering and Architecture, Anyang Normal University, Anyang, 455000, China The deterioration mechanism of concrete with mineral admixtures subjected to drying-wetting cycles in a 10% sodium sulphate solution was studied. Plain concrete without fly ash addition, concrete with 10%, 20% and 30% fly ash addition, and a concrete with 20% fly ash and 30% slag addition were used. Through the experiment, the weight loss, the relative dynamic modulus of elastically (RDME), the compressive strength loss and the damage layer thickness (Hf) of the concrete were measured. Furthermore, scanning electron microscopy, X-ray diffraction and thermal analysis were used to investigate the corrosion products of the concrete. The test results show that the ultrasonic velocity in the damage layer decreases and the Hf of the concrete increases as the corrosion time grows, indicating that the deterioration degree of the concrete increases. There is a significant relationship between the RDME and the Hf after 210 d. The deterioration degree of the concrete decreases with an increase in the fly ash content. However, the sulphate resistance property of the concrete significantly decreases with 30% fly ash content. When mixed with 20% fly ash and 30% slag, the sulphate resistance property of the concrete is the best. http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1258 Concrete Mineral admixtures sulphate attackDrying-wetting cycles Damage layer thickness |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lei Jiang Ditao Niu |
spellingShingle |
Lei Jiang Ditao Niu THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENT Ceramics-Silikáty Concrete Mineral admixtures sulphate attack Drying-wetting cycles Damage layer thickness |
author_facet |
Lei Jiang Ditao Niu |
author_sort |
Lei Jiang |
title |
THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENT |
title_short |
THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENT |
title_full |
THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENT |
title_fullStr |
THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENT |
title_full_unstemmed |
THE DETERIORATION OF ADMIXTURE CONCRETE IN A SULPHATE ENVIRONMENT |
title_sort |
deterioration of admixture concrete in a sulphate environment |
publisher |
University of Chemistry and Technology, Prague |
series |
Ceramics-Silikáty |
issn |
0862-5468 1804-5847 |
publishDate |
2019-04-01 |
description |
The deterioration mechanism of concrete with mineral admixtures subjected to drying-wetting cycles in a 10% sodium sulphate solution was studied. Plain concrete without fly ash addition, concrete with 10%, 20% and 30% fly ash addition, and a concrete with 20% fly ash and 30% slag addition were used. Through the experiment, the weight loss, the relative dynamic modulus of elastically (RDME), the compressive strength loss and the damage layer thickness (Hf) of the concrete were measured. Furthermore, scanning electron microscopy, X-ray diffraction and thermal analysis were used to investigate the corrosion products of the concrete. The test results show that the ultrasonic velocity in the damage layer decreases and the Hf of the concrete increases as the corrosion time grows, indicating that the deterioration degree of the concrete increases. There is a significant relationship between the RDME and the Hf after 210 d. The deterioration degree of the concrete decreases with an increase in the fly ash content. However, the sulphate resistance property of the concrete significantly decreases with 30% fly ash content. When mixed with 20% fly ash and 30% slag, the sulphate resistance property of the concrete is the best. |
topic |
Concrete Mineral admixtures sulphate attack Drying-wetting cycles Damage layer thickness |
url |
http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1258
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work_keys_str_mv |
AT leijiang thedeteriorationofadmixtureconcreteinasulphateenvironment AT ditaoniu thedeteriorationofadmixtureconcreteinasulphateenvironment AT leijiang deteriorationofadmixtureconcreteinasulphateenvironment AT ditaoniu deteriorationofadmixtureconcreteinasulphateenvironment |
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