Urban structure degradation caused by growth of plants and microbial activity
Author(s): |
E. Mejía
J. I. Tobón W. Osorio |
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Medium: | journal article |
Language(s): | Spanish |
Published in: | Materiales de Construccion, February 2019, n. 333, v. 69 |
Page(s): | 177 |
DOI: | 10.3989/mc.2019.09517 |
Abstract: |
The purpose of this study was to isolate microorganisms associated to surface-affected concrete structures and to measure the in vitro dissolution of concrete based on the release of elements such as calcium and silicon. Although many microorganisms were detected only a fungus was capable of significantly decreasing the culture medium pH and releasing both elements. The molecular characterization allowed to identify the microorganism as Aspergillus carbonaurius, a citric-acid producing fungus that dissolved concrete in the in vitro test. After seven days of incubation, the soluble calcium concentration in the uninoculated culture medium containing concrete was 172.3 mg/L, while in the inoculated medium it was 525.0 mg/L. The soluble silicon concentration in the uninoculated medium was 10.3 mg/L, while in the inoculated medium it was 50.1 mg/L. These findings showed that plants and microorganisms rendered a synergistic effect accelerating the biodeterioration of concrete. |
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data sheet - Reference-ID
10516867 - Published on:
10/12/2020 - Last updated on:
19/02/2021