Use of microorganism to improve the strength of cement mortar

By P. Ghosh, S. Mandal, B. Chattopadhyay, S. Pal. 2005

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Use of bacterial cell walls to improve the mechanical performance of concrete (2013, methodology): “The effects of bacteria on the mechanical strength of concrete are contradictory in various reports and organic nutrients added to the concrete sometimes had negative effects on mechanical strength [3,7–9].”
The Selective Value of Bacterial Shape (2006, background): “The organisms evidently plug the pores in the cement-sand mixture, perhaps by nucleating the precipitation of thin spicules of calcite (92).”
Biomineralization for sustainable construction - A review of processes and applications (2015, background): “Ghosh et al. (2005) found 17% increment in the”
Bacteria-based self-healing concrete (2011, background): “efficient sealing of surface cracks by mineral precipitation was observed when bacteria-based mixtures were sprayed or applied onto damaged surfaces or manually inserted into cracks [7-13].”