Screening of Fungi for Potential Application of Self-Healing Concrete

被引：88

作者：

Menon, Rakenth R. ^{[1
]}

Luo, Jing ^{[2
]}

Chen, Xiaobo ^{[3
]}

Zhou, Hui ^{[3
]}

Liu, Zhiyong ^{[4
]}

Zhou, Guangwen ^{[1
,3
]}

Zhang, Ning ^{[2
,5
]}

Jin, Congrui ^{[1
,3
]}

机构：

[1] Binghamton Univ, Dept Mech Engn, Binghamton, NY 13902 USA

[2] Rutgers State Univ, Dept Plant Biol, New Brunswick, NJ 08901 USA

[3] Binghamton Univ, Mat Sci & Engn Program, Binghamton, NY 13902 USA

[4] Univ Alabama Birmingham, Dept Neurol, Ctr Neurodegenerat & Expt Therapeut, Birmingham, AL 35294 USA

[5] Rutgers State Univ, Dept Biochem & Microbiol, New Brunswick, NJ 08901 USA

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

NATURAL GYPSUM CASO4.2H(2)O; TRANSCRIPTION FACTOR; AMBIENT PH; ASPERGILLUS-NIDULANS; CALCIUM-OXALATE; GENE-EXPRESSION; CARBONATE PRECIPITATION; METAL CARBONATES; INTEGRATOR GENE; CHITIN;

D O I：

10.1038/s41598-019-39156-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Concrete is susceptible to cracking owing to drying shrinkage, freeze-thaw cycles, delayed ettringite formation, reinforcement corrosion, creep and fatigue, etc. Continuous inspection and maintenance of concrete infrastructure require onerous labor and high costs. If the damaging cracks can heal by themselves without any human interference or intervention, that could be of great attraction. In this study, a novel self-healing approach is investigated, in which fungi are applied to heal cracks in concrete by promoting calcium carbonate precipitation. The goal of this investigation is to discover the most appropriate species of fungi for the application of biogenic crack repair. Our results showed that, despite the significant pH increase owing to the leaching of calcium hydroxide from concrete, Aspergillus nidulans (MAD1445), a pH regulatory mutant, could grow on concrete plates and promote calcium carbonate precipitation.

引用

页数：12

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