Optimum concentration of Bacillus megaterium for strengthening structural concrete

被引：153

作者：

Andalib, Ramin ^{[1
]}

Abd Majid, Muhd Zaimi ^{[1
]}

Hussin, Mohd Warid ^{[1
]}

Ponraj, Mohanadoss ^{[1
]}

Keyvanfar, Ali ^{[1
]}

Mirza, Jahangir ^{[1
]}

Lee, Han-Seung ^{[2
]}

机构：

[1] Univ Teknol Malaysia, Inst Smart Infrastruct & Innovat Construct, UTM Construct Res Ctr, Fac Civil Engn, Utm Skudai 81310, Johor Bahru, Malaysia

[2] Hanyang Univ, Dept Architectural Engn, Seoul 133791, South Korea

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 118卷

关键词：

Bacillus megaterium; Calcite precipitation; Bacterial concrete; Strength; Micro-structural analysis; BACTERIAL CARBONATE PRECIPITATION; IMPROVEMENT; DURABILITY; AGENT;

D O I：

10.1016/j.conbuildmat.2016.04.142

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Five different cell concentrations of Bacillus megaterium (10 x 10(5) to 50 x 10(5) cfu/ml) were introduced in structural concrete to achieve the optimum concentration of bacteria. The significant increase in the strength was obtained in the case of 30 x 10(5) cfu/ml at different ages. The strength of highest grade of bacterial concrete had improved (24%) as compared to lowest grade (12.8%) due to calcification mechanism. Microbial calcite precipitation was quantified using X-ray diffraction analysis, visualized by scanning electron microscopy and analyzed by energy dispersive spectrometer. It was found that the optimum concentration of B. megaterium had a positive effect on high strength structural concrete. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：180 / 193

页数：14

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