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Non-ureolytic bacterial carbonate precipitation as a surface treatment strategy on cement-based materials
XU Jing * #,YAO Wu
Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 201804
*Correspondence author
#Submitted by
Subject:
Funding: Specialized Research Fund for the Doctoral Program of Higher Education （No.No. 20100072120032）, National Natural Science Foundation of China （No.No. 51008227）
Opened online:29 March 2013
Accepted by: none
Citation: XU Jing,YAO Wu.Non-ureolytic bacterial carbonate precipitation as a surface treatment strategy on cement-based materials[OL]. [29 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4532976
 
 
Bacterially-induced caclium carbonate precipitation is a general phenomenon in nature. It has been proposed as an environment-friendly strategy for the protection of cement-based materials. This paper investigates calcium carbonate precipitation induced by non-ureolytic bacteria of genus Bacillus. Surface treatment using this biodeposition technique was evaluated by parameters affecting the durability of cement-based materials. Outcomes from this study revealed that bacterial surface treatment on specimens resulted in a pronounced decrease of capillary water absorption and increase of resistance to carbonation. This novel biological surface treatment shows promising prospect for particularly increasing durability aspects of concrete constructions.
Keywords:Calcium carbonate precipitation; Bacteria; Cement-based material
 
 
 

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