作者: Meng Fu Wang, Xing Yu Song

摘要: The relationships between the mechanical properties of modified concrete and the composition of latex blend were studied. Influence of steel fiber and polypropylene fiber on performance of modified concrete was analyzed on that basis. The results indicate that the contradiction between the strength and the damping property of normal concrete will be relieved to some degree by controlling the proportion of latex blend. The adding of fiber can modify the damping property of concrete, while it has a little effects on the compressive strength and elastic modulus of concrete.

1869

作者: Xing Guo Wang, Zhao Xia Cheng, Yongchao Hao, Yi Xin Wang

摘要: Mixing three different fiber composites into concrete specimens respectively, compressive strength, splitting tensile strength and flexural strength for fiber-reinforced concrete was done. The results show that the strengths of fiber reinforced concrete are improved to some extent. Due to the addition of fiber, the fiber concrete bears some of the force in tension, thus the time from the initial crack to damage is more prolonged comparing with normal concrete. Fiber concrete specimens did not get the collapse and lower intensity suddenly. Compared with normal concrete, the maximum increase of the reinforced concrete with steel fiber SQB -32 (Ⅱ) is listed, which compressive, tensile and flexural strength are increased by 30%, 40% and 24%, respectively.

1976

作者: Yan Kun Zhang, Xiao Hu Li, Pan Zhang

摘要: Based on the experiment, the splitting tensile strength and axial tensile strength of specified density steel fiber concrete are studied. The influence of type of steel fiber, volume content of the fiber and substitution ratio of lightweight aggregate is analyzed. The relationship between splitting tensile strength and axial tensile strength of specified density steel fiber concrete is suggested.

330

作者: Ning Hui Liang, Xin Rong Liu, Ji Sun

摘要: Through compression tests on 30 plain concrete and polypropylene fiber concrete specimens with the dimensions of 100mm × 100mm × 100mm , studied the influence of the different scales of polypropylene fiber and hybrid fiber on concrete compressive strength and compressive deformation. The results showed that: the compressive strength of concrete for single-doped fiber has little effect to improve concrete compressive strength, some even get lower,but mixing-doped coarse-fine fiber had increased 6.2%~13.7%. Doped-fiber can improve the concrete compressive toughness, it's enhancement sort: mixing-doped coarse-fine fiber concrete > single-doped coarse fiber concrete > single-doped fine fiber concrete> plain concrete

1584

作者: Xiao Chu Wang, Jun Wei Wang, Hong Tao Liu

摘要: In order to further investigate the stress-strain curve of carbon fiber reinforced concrete, the curve of stress-strain is used segmentation tabulators on the basis of the existing tests. Based on the axial compression experiments of 9 carbon fiber concrete reinforced samples filled with different carbon fiber admixture amounts, the theoretical calculating formula of the stress-strain curve with different admixture amounts was proposed, and the theoretical formula of calculation parameters and carbon fiber volume fraction was putted forward. The experimental results show that the calculation parameters of the stress-strain curve increases with the increase of the carbon fiber admixture amounts. The theoretical calculating formula of the peak strain and carbon fiber volume fraction, the compressive strength, and the calculated results agreed well with the experimental results.

640