摘要
研究了不同掺量的钢纤维和聚丙烯纤维对再生混凝土的轴心抗压强度、劈裂抗拉强度、抗折强度、弹性模量的影响。并给出了各个力学性能与纤维掺量的经验公式。试验结果表明:钢纤维和聚丙烯纤维的掺入对再生混凝土轴心抗压强度、劈裂抗拉强度、抗折强度及弹性模量均有不同程度提高,其中对劈裂抗拉强度的提升最为显著,对轴心抗压强度的提升不明显,对弹性模量的影响较小。钢纤维掺量为2%时,劈裂抗拉强度、抗折强度分别提高44.8%、34.0%,钢纤维掺量为1.5%时,轴心抗压强度、弹性模量分别提高19.4%、10.5%。聚丙烯纤维掺量为0.8 kg/m3时,轴心抗压强度、劈裂抗拉强度、抗折强度、弹性模量分别提高15.8%、40.5%、39.6%、7.7%。
The effects of steel fibers and polypropylene fibers with different contents on the axial compressive strength,split tensile strength,flexural strength,and elastic modulus of recycled concrete are studied.The empirical formulas for various mechanical properties and fiber content are given.The test results show that the incorporation of steel fiber and polypropylene fiber improves the axial compressive strength,split tensile strength,flexural strength,and elastic modulus of recycled concrete in different degrees,and the tensile strength of splitting increases.The most significant is that the improvement of the axial compressive strength is not obvious,and the effect on the elastic modulus is small.When the content of steel fibers is 2%,the split tensile strength and bending strength increase by 44.8%and 34.0%,respectively,and when the content of steel fibers reaches 1.5%,the axial compressive strength and elastic modulus increase by 19.4%and 10.5%,respectively.When the polypropylene fiber content was 0.8 kg/m3,the axial compressive strength,split tensile strength,flexural strength,and elastic modulus increased by 15.8%,40.5%,39.6%,and 7.7%,respectively.
作者
霍俊芳
白笑笑
姜鹏飞
郝贠洪
储建军
宋的添
HUO Junfang;BAI Xiaoxiao;JIANG Pcngfei;HAO Yunhong;CHU Jianjun;SONG Dctian(Civil Engineering Institute,Inner Mongolia University of Technology,Hohhot 010051,China;MCC Huatian Baotou Design and Research Institute Co.,Ltd.,Baotou 014010,China;Construction Management Office,China Railway Hohhot Bureau Group Co.,Ltd.,Hohhot 010051,China)
出处
《混凝土》
CAS
北大核心
2019年第8期92-95,99,共5页
Concrete
基金
区域特殊环境下高铁前风挡玻璃受侵蚀力学行为与损伤机理研究(11662012)
关键词
纤维再生混凝土
轴心抗压强度
劈裂抗拉强度
抗折强度
弹性模量
fiber recycled concrete
axial compressive strength
split tensile strength
flexural strength
elastic modulus
