玄武岩-聚丙烯混杂纤维RPC抗压强度及混杂效应试验  

Experimental Study on Basalt-Polypropylene Hybrid Fiber RPC Compressive Strength and the Effect of Hybrid

作　　者：何晓雁[1] 秦立达 郝贠洪[1] 李慧[1] 张淑艳[1] 

机构地区：[1]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051

出　　处：《土木工程与管理学报》2016年第4期24-28,共5页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51468049);内蒙古工业大学校基金项目(X201508)

摘　　要：通过单掺和混掺的方式,分别按玄武岩纤维2、3、4、5 kg/m3,聚丙烯纤维0.2、0.4、0.6、0.8 kg/m3掺入活性粉末混凝土(Reactive Powder Concrete,RPC)中,对其进行全面对比抗压试验,并采用比值法评价两种纤维在RPC基体中的混杂效应。结果表明,纤维的掺入可以明显提高RPC基体的抗压强度,且玄武岩纤维起主导作用;通过计算混杂效应系数知,存在正、负两种混杂效应,若纤维掺量、匹配问题选择不当,则可能出现负混杂效应;当玄武岩纤维掺量为4 kg/m3,聚丙烯纤维掺量为0.6 kg/m3时,可获得最优正混杂效应,RPC基体抗压强度达87 MPa,比基准组提高23.9%。Through the way of single or mixed, adding the basalt fiber of 2,3, 4, 5 kg/m^3 and polypropylene fiber of 0.2, 0.4, 0.6, 0.8 kg/m3 into reactive powder concrete respectively, carries on the comprehensive contrast compression test, and use the ratio method to evaluate two kinds of hybrid effect of fibers in the RPC substrate. Results show that the mixed fiber can obviously increase the compressive strength of RPC matrix, and play a leading role and the basalt fibers. By calculating the coefficient of hybrid effect, there are both positive and negative hybrid effect, if the fiber dosage, and improper selection matching problem may appear negative hybrid effect. When the dosage of basalt fiber is 4 kg/m3 , polypropylene fiber content is 0.6 kg/m3 , it can obtain the optimal positive hybrid effect and compressive strength of 87MPa, the RPC matrix than the baseline group increased by 23.9%.

关 键 词：活性粉末混凝土 混杂效应 玄武岩纤维 抗压强度 聚丙烯纤维 

分 类 号：TU528.572[建筑科学—建筑技术科学]