掺入纳米SiO_2对水泥净浆流动性和力学性能的影响  

The effect of nano-SiO_2 on fluidity and the mechanical properties of the cement paste

作　　者：米增财[1] 赵彦亮[1] 谭俊华[1] 朱开金[1] 

机构地区：[1]太原工业学院材料工程系,山西太原030008

出　　处：《山西化工》2014年第5期12-15,共4页Shanxi Chemical Industry

摘　　要：掺入纳米SiO2,采用2种掺入方法和不同掺量,讨论了对水泥净浆的流动度和强度等性能的影响,得出最佳掺量和掺入方法。进一步探究掺入不同粒径的纳米SiO2对水泥净浆性能的影响规律。实验得出,采用将纳米SiO2与水泥先干混再拌合方法更利于拌合分散均匀,掺量越大流动度降低程度越大,而粒径越小流动度明显降低;纳米SiO2掺量的强度影响临界值为1.5%;各个粒径对早、中期强度均有明显增强,30nm的效果最明显。The incorporation of nano SiO2 with two kinds of doping method and different content,affect the fluidity and strength performance of cement paste,to get out the optimum dosage and adding method.And further explore the influence of different nano SiO2 particle size on the performance of cement paste.The method of using nano SiO2 and cement by dryly mixing after Sired is more conducive to mix and disperse evenly;the greater volume of added,the greater reduce the level of fluidity;the smaller particle size significantly influence the fluidity of nano SiO2;the critical value of nano SiO2 added for the enhancement on strength is 1.5%;for each added particle size,the early and middle intensity are obviously enhanced,the most obvious effect is from 30 nm.

关 键 词：纳米SIO2 水泥净浆 粒径 强度 流动性 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]