Addition of silica fume into the mix will result in increasing the workability and strength of cement mortar and decreasing the expansion.

同时掺加硅灰还能够提高掺玻璃纤维高钙粉煤灰水泥砂浆的和易性和强度，并减小其膨胀。

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The influence of the fineness and the amount of the rubber powder on the flexural and compressive strength of cement mortar are researched.

探讨了废旧轮胎胶粉的细度和掺量对水泥砂浆抗折抗压强度的影响。

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The result shows that the flexural strength of cement mortar reduces greatly by adding hydroxyethyl methyl cellulose, while adding vinyl co-polymer the strength can increase considerably.

结果表明，掺加羟乙基甲基纤维素会明显降低水泥砂浆抗折强度，而掺加乙烯基共聚物则能显著提高水泥砂浆抗折强度；

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