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The world cultural heritage Yungang Grottoes, created in the sandstone is seriously degraded due to the intrusion of salty ground water, resulting in the blurred image and unclear facial features, which need urgent restoration and rescue. In this paper, we study how to use Microbial Induced Carbonate Precipitation（MICP）by the percolation method to stabilize the sandstone samples taken from the Yungang Grottoes. Experiments were conducted to investigate the changes of sandstone samples strength, microstructure, pore characteristics, permeability and aging properties before and after the test of microbial infiltration and solidification, as well as the effects of different microbial infiltration formulas and ambient temperature The study aims to find new breakthrough points for the scientific and effective protection of sandstone relics.
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