纳米SiO_2钢纤维补偿收缩混凝土力学性能的试验分析  

Test Analysis on Mechanical Properties of Nano-SiO_2 Shrinkage Compensating Steel Fiber Concrete

作　　者：曾伟[1] 马芹永[1] 

机构地区：[1]安徽理工大学土木建筑学院,淮南232001

出　　处：《混凝土与水泥制品》2013年第4期37-39,共3页China Concrete and Cement Products

基　　金：2009年高等学校博士学科点专项科研项目资助(20093415110001)

摘　　要：对不同百分比掺量的纳米SiO2和钢纤维做了正交试验,进行了7d,28d抗压强度和劈裂抗拉强度试验研究。结果表明,掺入纳米SiO2能显著提高混凝土早期抗压强度,掺量为1.2%时抗压强度提高24.5%。掺入钢纤维能显著提高混凝土劈裂抗拉强度,钢纤维体积率掺量达到1.6%时劈裂抗拉强度提高78.6%。纳米SiO2和钢纤维的复合掺入,可显著优化补偿收缩混凝土的力学性能。Taking different percentage of dosage of nano-SiO2 and steel fibers for orthogonal tests, the results of compressive strength and resistance to splitting strength for 7d, 28d have been analyzed. The results show that adding nanometer SiO2 can remarkably improve the early compressive strength of concrete, when mixing content is 1.2%, the compressive strength can increase 24.5%. Adding steel fiber can remarkably improve the concrete resistance to splitting strength, when mixing content is 1.6%, the resistance to splitting strength can increase 78.6%. The shrinkage compensating concrete mechanical properties can significantly optimized through the mixing of nano-SiO2 and steel fiber.

关 键 词：纳米SIO2 钢纤维 补偿收缩混凝土 力学性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]