In situ precipitation for the surface treatment and repair of cement-based materials

A calcium oxalate-mineralized film was synthesized in situ on the surface of Portland-cement-based material, aimed at protecting the concrete against water penetration and to facilitate crack repair. Microanalysis results show that the homogeneously dense film was highly compatible with the cement p...

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Bibliographic Details
Published inJournal of adhesion science and technology Vol. 34; no. 11; pp. 1233 - 1240
Main Authors Ding, Zhu, Fang, Yuan, Su, Jun-Feng, Hong, Shuxian, Dong, Biqin
Format Journal Article
LanguageEnglish
Published Utrecht Taylor & Francis 02.06.2020
Taylor & Francis Ltd
Subjects
Calcium
Cement
Cement paste
cement-based materials
Concrete
Concrete structures
crack repair
Cracks
Hydrophobicity
in situ synthesis
Kidney stones
Mineralized film
Oxalic acid
Penetration
Repair
surface protection
Surface treatment
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Summary:A calcium oxalate-mineralized film was synthesized in situ on the surface of Portland-cement-based material, aimed at protecting the concrete against water penetration and to facilitate crack repair. Microanalysis results show that the homogeneously dense film was highly compatible with the cement paste, and its thickness increased with the increasing oxalic acid concentration. Additionally, the results demonstrate the film's high efficacy in water penetration of cement-based materials due to the improvement in its hydrophobicity. In addition, the formed calcium oxalate monohydrate can repair cracks in concrete. This would be a simple and effective method to improve durability of concrete structures.
ISSN:0169-4243
1568-5616
DOI:10.1080/01694243.2019.1705143