Author
Bundur, Zeynep Başaran, Amiri, Ali, Ersan, Y. C., Boon, N., Belie, N. de
Publication Date
2017
Publication Place
-
Elsevier
Subject
Biomineralization, Air entraining admixture (D), Calcium carbonate (D), Cement paste (D), Thermal analysis (B)
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0008-8846
Record ID
2d1dd567-3873-4198-bdc8-26501180032a
Library Location
Civil Engineering
Date
2017
Sample Text
The applications of self-healing in cement-based materials via biomineralization processes are developing quickly. The main challenge is to find a microorganism that can tolerate the restricted environment of cement paste matrix (i.e. very high pH, lack of oxygen and nutrients, small pore size etc.). The focus of this work was to determine the possible use of an ammonium salt-based air-entraining admixture (AEA) as a protection method to improve the survival of incorporated Sporosarcina pasteurii cells in cement-based mortar. Bacterial cells were directly added to the mortar mix with and without nutrients. Nutrients should be provided to keep the microorganisms viable even at early ages (i.e. 7 days). Surface charge of the bacterial cells and in vitro biogenic calcium carbonate (CaCO3) precipitation were not affected by the incorporation of AEA. However, introducing AEA did not influence the viability in mortar samples, which might be attributed to the type and chemistry of AEA used.
DOI
10.1016/j.cemconres.2017.04.005
Cilt
98
