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Biomineralization technique in self-healing of fly-ash concrete
Santosh Ashok Kadapure1*
,
Girish S Kulkarni2
,
K.B Prakash3
,
,
1Department of Chemical Engineering, KLE Dr MSS Shesgiri College of Engineering and Technology, Belgaum
2Department of Environmental Science & Technology, Department of Technology Shivaji University, Kolhapur
3Government Engineering College, Haveri, Karnataka
*교신저자. *Corresponding Author. 
March 2017. pp. 54-65
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Abstract

The main aim of running this paper is to investigate the effectiveness of bacteria as a bio-based agent in self-healing of cracks in fly ash concrete. Alkali-resistant spore-forming bacteria related to the genus Bacillus was selected for this study. The performance of bio-based agent is assessed by checking the mechanical and durability properties of bio-remediated fly ash concrete. Various dosages of bacteria cell concentrations were introduced into artificial created cracks. The study showed up to 15.6% increase in compressive strength for a depth of 1.2 inch with the addition of 105cells/ml of both the strains. Since calcite formed fills up the pores, bio -based agent has potential to decrease the porosity and enhance strength and durability property of fly-ash concrete. The formation of calcite crystals was evaluated by scanning electron microscope (SEM) and XRD analysis. Both the strains appear to be appropriate self healing bio-agent to repair the cracks in concrete and would substantially reduce maintenance, repair and not only saves money but would also reduce CO2 emissions as less cement would be required to develop sustainable concrete.

Keywords
bacteria
bio-agent
sustainable fly ash concrete
self-healing
biomineralization

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Information
  • Publisher :Sustainable Building Research Center (ERC) Innovative Durable Building and Infrastructure Research Center
  • Publisher(Ko) :건설구조물 내구성혁신 연구센터
  • Journal Title :International Journal of Sustainable Building Technology and Urban Development
  • Volume : 8
  • No :1
  • Pages :54-65
  • Received Date : 2017-01-06
  • Accepted Date : 2017-01-18
  • DOI :https://doi.org/10.12972/susb.20170005
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