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Title:The effect of crystalline waterproofing a dmixtures on the self-healing and permeability of concrete
Authors:ID Gojević, Anita (Author)
ID Ducman, Vilma (Author)
ID Netinger Grubeša, Ivanka (Author)
ID Baričević, Ana (Author)
ID Banjad Pečur, Ivana (Author)
Files:URL URL - Source URL, visit https://www.mdpi.com/1996-1944/14/8/1860
Description: Open access
 
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MD5: BE646697841692430FD8E4A0509892F6
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:This paper investigates the effectiveness of a specific crystalline waterproofing admixture (CWA) in concrete as a function of a water–binder ratio. Four concrete mixes with and without CWA were prepared; two of them with a water–binder ratio of 0.45 and two of them with a water– binder ratio of 0.55. Water permeability and compressive strength were tested on hardened concrete specimens and self-healing of cracks over time was observed. Cement paste and CWA paste were prepared to clarify the results obtained on the concrete specimens. SEM and EDS and XRD and FTIR were performed on the hardened pastes to explain the mechanism of CWA working. The results show that the addition of CWA had no significant effect on the compressive strength of the concrete, but reduced the water penetration depth in the concrete, and the reduction was more effective for mixes with lower water–binder ratio. Regarding the self-healing effect, it can be concluded that the addition of CWA improves the crack healing in concrete, but the efficiency of self-healing is highly dependent on the initial crack width. The mechanisms involved in the reduction of water penetration depth and crack healing in concrete can be explained by different mechanisms; one is creation of the CSH gel from unreacted clinker grains, then formation carbonate, and additional mechanism is gel formation (highly expansive Mg-rich hydro-carbonate) from magnesium based additives. The presence of sodium silicate, which would transform into carbonate/bicarbonate, also cannot be excluded.
Keywords:slag, self healing concrete, crystal admixture, microstructural analysis
Publication status:Published
Publication version:Version of Record
Publication date:09.04.2021
Publisher:Molecular Diversity Preservation International
Year of publishing:2021
Number of pages:str. 1-14
Numbering:Vol. 14, iss. 8
PID:20.500.12556/DiRROS-15867 New window
UDC:620.1/2
ISSN on article:1996-1944
DOI:10.3390/ma14081860 New window
COBISS.SI-ID:59413251 New window
Copyright:© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Note:Nasl. z nasl. zaslona; Opis vira z dne 143 4. 2021; Št. članka 1860;
Publication date in DiRROS:03.07.2023
Views:792
Downloads:565
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GOJEVIĆ, Anita, DUCMAN, Vilma, NETINGER GRUBEŠA, Ivanka, BARIČEVIĆ, Ana and BANJAD PEČUR, Ivana, 2021, The effect of crystalline waterproofing a dmixtures on the self-healing and permeability of concrete. Materials [online]. 2021. Vol. 14, no. 8, p. 1–14. [Accessed 11 April 2025]. DOI 10.3390/ma14081860. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=15867
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Record is a part of a journal

Title:Materials
Shortened title:Materials
Publisher:MDPI
ISSN:1996-1944
COBISS.SI-ID:33588485 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P2-0273
Name:Gradbeni objekti in materiali

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:samopopravljivi beton, kristalinični dodatki, mikrostrukturne analize


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