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http://dx.doi.org/10.1080/12269328.2018.1425162

Mechanical properties and microstructure of innovative bio-mortar containing different aggregates  

Abo-El-Eanein, S.A. (Faculty of Science, Chemistry Department, Ain Shams University)
Abdel-Gawwad, H.A. (Housing and Building National Research Center, Raw Building Materials and Processing Reasearch Institute)
El-Mesallamy, Amani M.D. (Faculty of Science, Chemistry Department, Zagazig University)
El-Belbasi, Hussein I. (Faculty of Veterinary, Bio-Chemistry Department, Zagazig University)
Ayoub, Hebah. G. (Faculty of Science, Chemistry Department, Zagazig University)
Publication Information
Geosystem Engineering / v.21, no.5, 2018 , pp. 291-296 More about this Journal
Abstract
The aim of this work is to study the effect of aggregate type on the physico-mechanical properties and microstructure of bio-mortar (BM). Three different aggregates such as sand, dolomite and basalt were used. BM was prepared by mixing aggregates with bacterial cells (Sporosarcina Pasteurii) and one equimolar (1 M) of $urea/CaCl_2.2H_2O$. The results proved that the chemical composition and physical properties of aggregates play an important role in the microbial precipitation rate as well as size, morphology and crystallinity of the precipitated calcite, which strongly reflects on the properties of the prepared BM. The BM containing dolomite gave the highest compressive strength and lowest water absorption.
Keywords
Adhesion; amorphous materials; crystal growth; bacteria; microstructure; bio-mortar;
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