The surface coating mechanism of polluted concrete by Candida ethanolica induced calcium carbonate mineralization
| Autor: | Sih Ying Kong, Dawood Muhammad Iqbal, Praveen Regunathan, Leong Sing Wong, Ahmed Farid Mahmoud Oweida |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Chemistry
0211 other engineering and technologies 020101 civil engineering Heavy metals 02 engineering and technology Building and Construction Mineralization (soil science) 0201 civil engineering chemistry.chemical_compound Surface coating Compressive strength Calcium carbonate Chemical engineering [Candida] ethanolica 021105 building & construction General Materials Science Beer industry Calcium oxide Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 257:119482 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2020.119482 |
| Popis: | This paper documents the laboratory evidence on the mineralization mechanism of Candida ethanolica for surface coating of concrete with polluted sand as fine aggregate. C. ethanolica is largely discovered as a waste microbe in the beer industry. The tendency of the microbe to cultivate easily and induce bio-crystals with the capability to encapsulate heavy metals; has made it mesmerizing to be explored in a sustainable manner for concrete surface coating technology. Under the influence of the optimal initial pH, calcium oxide concentration, and fungal cell concentration in the liquid growth media; the treated concrete cubes were experimented to have an average 28-day compressive strength of 32.20 MPa. Such strength value is 6.27% higher when compared to that of the untreated concrete cubes at the same curing time. Overall, the findings revealed that the fungal bio-crystals have a promising prospect to be applied as a concrete surface coating. |
| Databáze: | OpenAIRE |
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