Evaluation of Portland and Pozzolanic cement on the self-healing of mortars with calcium lactate and bacteria

被引：37

作者：

Gonzalez, Alvaro ^{[1
]}

Parraguez, Araceli ^{[2
]}

Corvalan, Liliana ^{[3
]}

Correa, Nestor ^{[3
]}

Castro, Javier ^{[4
]}

Stuckrath, Claudia ^{[1
]}

Gonzalez, Marcelo ^{[1
]}

机构：

[1] Pontificia Univ Catolica Chile, Santiago, Chile

[2] Univ Federico Santa Maria UTFSM, Dept Civil Engn, Valparaiso, Chile

[3] Univ Desarrollo, Clin Alemana, Fac Med, Concepcion, Chile

[4] Univ Desarrollo, Fac Engn, Concepcion, Chile

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 257卷

关键词：

Self-healing; Mortar; Cement type; Temperature; Bacteria; CONCRETE; PERFORMANCE; AGENT; QUANTIFICATION; OPTIMIZATION;

D O I：

10.1016/j.conbuildmat.2020.119558

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This article studies the effect of Portland and Pozzolanic cement on the crack-healing of mortars prepared with Bacillus pseudofirmus bacteria and calcium lactate as a nutrient. Mixtures were prepared with the same content of cement, water, sand, and Light Weight Aggregate. Results showed an inverse relationship between crack width and self-healed area, with most of the healing occurring between 0 and 21 days of sample conditioning. The healing on samples with calcium lactate only and calcium lactate + bacteria was significantly higher than in control samples. Results indicate that Portland cement better promotes the self-healing of cracks compared to Pozzolanic cement. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：11

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