超声作用与减水剂对水泥基材料性能影响的对比分析

Comparative Analysis of the Effects of Ultrasonic Action and Water Reducing Agent on the Properties of Cement-based Materials

通过开展水泥基材料浆体中水泥颗粒分散度、净浆流动度、泌水率、密实度、流变性能等多项测试实验,对比分析了超声技术以及掺加减水剂对水泥基材料性能的影响。研究表明,超声作用能有效分散水泥颗粒,对水泥早期水化有促进作用,而掺加减水剂则会增加泌水风险;Zeta电位测试表明,减水剂的作用时间比超声作用时间短;抗压强度测试表明,超声作用的水泥基材料强度更高;压汞法与超声脉冲波结果表明,超声作用对于水泥基材料的长期性能影响不显著。因此,在一些特殊工程项目建设中,可以结合超声技术作用于水泥浆体,提高水泥使用性能。

The effects of ultrasonic technology and water reducing agent on the properties of cementbased materials were compared and analyzed by carrying out a number of test experiments such as cement particle dispersion,paste fluidity,bleeding rate,compactness and rheological properties in cement-based material paste.The research shows that ultrasonic action can effectively disperse cement particles and promote the early hydration of cement,while the addition of water reducing agent will increase the risk of bleeding;zeta potential test showed that the action time of water reducer was shorter than that of ultrasonic.The compressive strength test shows that the strength of cement-based materials under ultrasonic action is higher;the results of mercury intrusion method and ultrasonic pulse wave show that the effect of ultrasonic action on the long-term performance of cement-based materials is not significant.Therefore,in the construction of some special projects,ultrasonic technology can be combined with cement slurry to improve the performance of cement.