Impact of magnesium chloride on the mechanical properties of innovative bio-mortar

被引：39

作者：

Gawwad, H. A. Abdel ^{[1
]}

Mohamed, S. Abd El-Aleem ^{[2
]}

Mohammed, Samah A. ^{[3
]}

机构：

[1] Housing & Bldg Res Ctr, Raw Bldg Mat & Proc Reasearch Inst, Giza, Egypt

[2] Fayoum Univ, Fac Sci, Dept Chem, Al Fayyum, Egypt

[3] Housing & Bldg Res Ctr, Saintary & Environm Engn Inst, Dept Microbiol, Giza, Egypt

来源：

MATERIALS LETTERS | 2016年 / 178卷

关键词：

Bio-mortar; Crystal structure; Microbial induced calcite precipitation; Crystal growth; FTIR; XRD; SEM;

D O I：

10.1016/j.matlet.2016.04.190

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work aimsat studying the effect of different MgCl2 concentrations on the mechanical properties of bio-mortar. Calcium/Magnesium chloride (Ca/MgCl2) mixtures with molar (M) ratios of 1/0, 0.75/0.25, 0.5/0.5, 0.25/0.75 and 0/1 Ca/MgCl2 were tested for their abilities to consolidate sand by mixing with 1 M urea and bacterial cells (Sporosarcina pasteurii) with 2.4 optical density at 600 nm (00600). The results showed that, the compressive strength of the prepared bio-mortar decreases with the increase of MgCl2 concentration. This is mainly due to the change in the type and crystallinity of the precipitated mineral by bacterial cells within sand grains. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：39 / 43

页数：5

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