聚丙烯纤维对补偿收缩混凝土力学性能的影响  

Influence of Polypropylene Fibers on Mechanical Properties of Shrinkage Compensation Concrete

作　　者：朱显鸽[1] 安亚强[2] 娄宗科[2] 

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《人民黄河》2015年第2期130-132,135,共4页Yellow River

基　　金："十二五"农村领域国家科技计划项目(2011bad25b04);"十二五"国家科技支撑计划项目(2012bad08b01)

摘　　要：为了探究聚丙烯纤维对补偿收缩混凝土的强度和限制膨胀率的影响规律,通过对不同聚丙烯纤维掺量的补偿收缩混凝土与基准混凝土的对比试验,测出了不同聚丙烯纤维掺量下的补偿收缩混凝土的强度和限制膨胀率值。与基准混凝土测得的强度和限制膨胀收缩率值对比,得出了能使补偿收缩混凝土达到最大膨胀率和最大劈裂抗拉强度的聚丙烯的最优掺量为1.575 kg/m3,同时随聚丙烯掺量增加,补偿收缩混凝土的强度和限制膨胀率先增大后减小。In order to explore the influence rules between the polypropylene fiber＇s dosage and the shrinkage compensating concrete＇s strength or the restrictive expansion rate,the shrinkage compensating concrete,which was mixed with different dosages of polypropylene fibers,was compared with the normal concrete. After the comparison testing,measuring the strength and the restrictive expansion rate of the shrinkage compensating concrete and normal concrete,then these data show that the optimal dosage of polypropylene fibers is 1. 575 kg/m3 which can maximize the expansion rate and the splitting tensile strength of shrinkage compensating concrete. From the above data we can see that along with the increase of the dosage of polypropylene fibers,the shrinkage compensating concrete＇s strength and the restrictive expansion rate firstly increase then decrease.

关 键 词：聚丙烯纤维 补偿收缩混凝土 限制膨胀率 劈裂抗拉强度 掺量 

分 类 号：TU528.36[建筑科学—建筑技术科学]