In order to solve the problem of microbially induced calcium carbonate precipitation(MICP)technology for the crack deep area which was difficult to repair adequately,the Sporosarcina pasteurii was used as a microbial strain.Besides,microbial growth solution(including glucose and oxygen)was added in the repair liquid,and different repair processes were adopted to repair the cracks in the deep layer of concrete,and the repair effect was evaluated by three indexes:the apparent morphology of the cracks,the depth of the cracks and the water permeability of the concrete.Furthermore,the repair effect was analyzed by combining with the SEM-EDS(scanning electron microscopy-energy dispersive spectrometer)to analyze the reaction products.The results showed that the addition of microbial growth solution in the MICP repair process could provide conditions for microbial growth and metabolism in the anaerobic environment deep in the cracks,so that the mineralization reaction could be carried out normally,which could fill the deep area of the cracks adequately.
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