Author
Amiri, Ali, Bundur, Zeynep Başaran
Publication Date
2018-03-20
Publication Place
-
Elsevier
Subject
Biomineralization, Corn steep liquor, Compressive strength, Initial set, Mortar, Sporosarcina pasteurii
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0950-0618
Record ID
9eeb76b8-3e6f-4efe-a24c-4c4fa776625e
Library Location
Civil Engineering
Date
2018-03-20
Sample Text
Early age microcracks are generally the primary cause for a decrease in service life of cement-based structures. Recent studies suggested that it might be possible to develop a smart cement-based material that could self-heal microcracks. The use of microbial induced calcium carbonate precipitation (MICP) in cement-based materials is a novel approach to trigger self-healing and it has become an interesting field of research. MICP is a biochemical process where calcium carbonate (CaCO3) precipitation is obtained via metabolic pathways for microorganism and MICP via urea hydrolysis is the most common approach used in cement-based materials. Through the literature the most commonly used nutrient media for urea hydrolysis was composed of yeast extract and urea. However, use of yeast extract as a carbon source not only resulted with a severe retardation of initial setting and it increases the cost of the application. This study investigates the suitability of corn steep liquor (CSL) as an alternative replacement of yeast extract. CSL was found to be a suitable alternative for MICP applications without compromising bacterial growth, ability to promote CaCO3 precipitation. In addition, use of a nutrient medium including CSL and urea did not have such an adverse effect on initial set and compressive strength as compared to a urea and yeast extract medium. (C) 2018 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.conbuildmat.2018.01.070
Cilt
165
