In this paper,through different alkali silicic acid reaction test methods,the shallow metamorphic rocks such as slate and metamorphic sandstone in the large area of Qiandongnan area of Guizhou Province were tested and studied,and the physical and mechanics indicators,the main mineral component content of the alkali silicic acid reaction were analyzed,the rock mineral composition analysis was carried out by the trans-target polycrystalline X-ray diffraction method,and the different cement aggregate mix ratio mortar expansion rates were analyzed by different cement aggregates and mortar ratios,which provided relevant test references for concrete cement and aggregate selection.
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