Abstract: Optimizing mineralization mode is an effective way to improve the effect of microbial mineralization deposition (MICP) on the recovery of recycled aggregate. In this study, the effects of different mineralization methods on the physical properties of recycled aggregate were analyzed by changing the concentration of oxygen-supplying agent and the soaking position of recycled aggregate in culture solution, and the test results were further verified by microscopic analysis. The results showed that when the concentration of calcium peroxide was 15 g/L and the soaking position was in the middle of the culture solution, the water absorption rate of MICP recycled aggregate decreased by 40.4%, the crushing index decreased by 19.7%, the porosity decreased significantly and the pore size distribution was the best. At the same time, a large number of calcium carbonate crystals were produced to fill aggregate cracks, and the mineralization deposition effect was the best.
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2021, Vol. 35 
