本文主要研究在硝酸钙、碳酸钠以及两者复掺情况下,对干粉砂浆工作性能和力学性能的影响。试验结果表明,在硝酸钙和碳酸钠单掺时,随着掺量的增加,干粉砂浆保水率呈下降趋势,凝结时间缩短,干粉砂浆3d强度提高,28d强度呈下降趋势;两者复掺时,凝结时间最大可缩短到140min,3d和7d强度略有提高,28d强度呈下降趋势。 This paper mainly studies the effect of calcium nitrate, sodium carbonate and their combination on the workability and mechanical properties of dry mortar. The results showed that the water retention of dry mortar decreased with increasing the content of calcium nitrate and sodium carbonate, the setting time shortened, the 3d strength of dry mortar increased, and the intensity of 28d showed a decreasing trend. , The clotting time can be shortened to 140min, the intensity at 3d and 7d slightly increases, and the intensity at 28d shows a decreasing trend.