Influence of the Type of Dry Yeast on Precipitation Rate of Calcium Carbonate in Bio-Based Repair Materials

Putri, Prima Yane and Ujike, Isao and Kawaai, Keiyu (2017) Influence of the Type of Dry Yeast on Precipitation Rate of Calcium Carbonate in Bio-Based Repair Materials. In: 2nd International Conference on Bio-based Building Material & 1st Conference on ECOlogical Valorisation of Granular and Fibrous Material, 21-23 Juni 2017, France.

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Abstract

Abstract The cracking in concrete promotes deterioration such as the corrosion of reinforcing rebar, thus repairing in the filling of the crack is being implemented. Recent years, improving sealing efficiency using bio-based materials associated with microbial metabolic processes leading to precipitation of calcium carbonate has been intensively studied. In this study, the rate of initial reactions was calculated by examining the influencing factors on the precipitation rate that depends on the constituents of bio-based materials comprising yeast, glucose, and calcium acetate mixed in Tris buffer solution. Furthermore, the effects of the types of dry yeast on the amount of calcium carbonate precipitation were also investigated. The investigation showed that calcium carbonate precipitates as crystals depending on the types of constituents used in the mixtures and pH levels within 24 hours after mixing. The precipitation were assessed by Fourier Transformed Infra-Red spectroscopy (FT-IR). Hereafter, calcium carbonate precipitation was observed for all the types of dry yeast tested in this study. It was shown that the decrease of pH led to a change in calcium carbonate precipitation. Also, all the types of dry yeast commercially available which was tested in this research can be used as a microorganism in the bio-based repair materials.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > GT Technology (general)
Divisions: Fakultas Teknik > Teknik Sipil dan Bangunan - D3
Depositing User: Mrs. Wiwi Sartika
Date Deposited: 25 Mar 2019 02:48
Last Modified: 25 Mar 2019 07:33
URI: http://repository.unp.ac.id/id/eprint/21535

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