Author
Liu, S., Bundur, Zeynep Başaran, Zhu, J., Ferron, R. D.
Publication Date
2016-05
Publication Place
-
Elsevier
Subject
Self-healing, Mortar (E), Microcracking (B), Curing (A), Ultrasonic wave
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0008-8846
Record ID
47a64b6b-e457-4260-a3fa-40ab49969bcd
Library Location
Civil Engineering
Date
2016-05
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
Calcium carbonate biomineralization is a bio-chemical process in which calcium carbonate precipitation is obtained by leveraging the metabolic activity of microorganisms. Studies have shown that biomineralization can be used to repair surface cracks in cement-based materials. One of the challenges in determining whether biomineralization is a feasible option for internal crack repair pertains to how to monitor and quantify self-healing of internal microcracks. In this study, mortar samples with and without microcracks and microorganisms were cured in different environments until 50 days. Coda wave interferometry measurements, a nondestructive method that is very sensitive to small changes in material, were conducted on these samples to evaluate the extent of self-healing during the entire curing period. Compressive strength tests were performed after 7 and 28 days of curing. The results indicated that the cracked mortar samples with microorganisms showed significantly higher strength development and higher relative velocity change than samples without microorganisms.
DOI
10.1016/j.cemconres.2016.01.006
Cilt
83
