摘要
研究不同钢纤维掺量、长度、长径比及混杂纤维对活性粉末混凝土(RPC)流动性、抗压强度和抗折强度的影响。试验表明:单掺纤维时,纤维长度在一定范围内随着纤维长径比的增大,RPC流动性降低,抗压强度和抗折强度有不同程度提高;当钢纤维长度达20mm时,RPC抗压强度和抗折强度均较低。混杂纤维保持总量1.5%不变,随着短纤维掺量的增加,流动度、抗压强度和抗折强度均呈先增加后降低的趋势。试验数据拟合得到RPC流动度、抗压强度和抗折强度计算公式。
The effects of different steel fiber content,length,length diameter ratio and hybrid fiber on the fluidity,compressive strength and flexural strength of RPC are studied. The results show that,with the increase of fiber length diameter ratio,the fluidity of RPC decreases,and the compressive strength and flexural strength increase to some extent. When the length of steel fiber reaches 20 mm,the compressive strength and flexural strength of RPC are low. Hybrid fiber keeps 1. 5% of the total amount unchanged,with the increase of short fiber,the fluidity,compressive strength and flexural strength increase first and then decrease. The formulas for calculating the fluidity,compressive strength and flexural strength of RPC are obtained by fitting the test data.
作者
李新星
周泉
李水生
LI Xinxing;ZHOU Quan;LI Shuisheng(China Construction Fifth Engineering Bureau Co.,Ltd.,Changsha,Hunan 410004,China)
出处
《施工技术》
CAS
2020年第14期81-85,共5页
Construction Technology
基金
湖南省科技重大专项项目(2017SK1010)
中建五局重大课题(cscec5b-2018-02)
湖湘青年英才项目(2018RS3113)
湖南省自然科学基金面上项目(2019JJ40331)。
关键词
活性粉末混凝土
钢纤维
试验
抗压强度
抗折强度
流动度
reactive powder concrete(RPC)
steel fiber
testing
compressive strength
flexural strength
fluidity
