POTENTIAL ANTI-COVID-19 AGENTS, CEPHARANTHINE AND NELFINAVIR, AND THEIR USAGE FOR COMBINATION TREATMENT




Experimental investigation on calcium dissolution performance of shotcrete with different waterproofing agents

The crystalline blockage of tunnel drainage pipes poses a common challenge to tunnel engineering, particularly in regions with abundant groundwater and severe ion erosion.Based on the design of concrete mix proportion, this paper improves the calcium ion erosion resistance of shotcrete by adding permeable crystalline sodium methyl silicate waterpro

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