Abstract
This paper presents the results of an experimental investigation carried out to evaluate the influence of two types of bacteria, namely Sporosarcina pasteurii and Bacillus subtilis, with different cell concentrations (106, 107, 108cells.ml−1) on the water absorption of four types of concrete aggregates. Surface deposition of calcium carbonate crystals was found to decrease water absorption by 20–30%, depending on the type of bacteria and aggregate porosity. The use of ureolytic gram-positive bacteria S. pasteurii resulted in a more pronounced decrease in the uptake of water by the aggregates. The reduced water absorption observed was possibly due to deposition on the bacteria cell walls in the pores. The results show that the aggregates retained their properties and yielded the same results after about 20days, indicating that the deposits remained over this time period. The XRD and SEM analysis indicated the formation of calcite in bacterial aggregates.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
