杨龙, 徐进, 薛维培. CF80高强钢纤维井壁混凝土力学特性研究[J]. 煤矿安全, 2018, 49(12): 59-63.
    引用本文: 杨龙, 徐进, 薛维培. CF80高强钢纤维井壁混凝土力学特性研究[J]. 煤矿安全, 2018, 49(12): 59-63.
    YANG Long, XU Jin, XUE Weipei. Study on Mechanical Properties of CF80 High Strength Steel Fiber Shaft Lining Concrete[J]. Safety in Coal Mines, 2018, 49(12): 59-63.
    Citation: YANG Long, XU Jin, XUE Weipei. Study on Mechanical Properties of CF80 High Strength Steel Fiber Shaft Lining Concrete[J]. Safety in Coal Mines, 2018, 49(12): 59-63.

    CF80高强钢纤维井壁混凝土力学特性研究

    Study on Mechanical Properties of CF80 High Strength Steel Fiber Shaft Lining Concrete

    • 摘要: 为了改善高强井壁混凝土的脆性特征,配制出了CF80高强钢纤维井壁混凝土,并对其基本力学性能和三轴抗压强度进行了试验研究。试验结果表明:在混凝土中加入20~40 kg/m3钢纤维,抗拉强度值可提高47.0%~68.3%,明显地改善高强混凝土的脆性特征;钢纤维掺量的改变对高强混凝土的立方体抗压强度和轴心抗压强度影响不大,对弹性模量和泊松比几乎没有影响;三轴抗压试验表明,钢纤维的加入能够提高试件破坏的峰值应变和残余强度,显著改善试件的破坏形态。因此,高强钢纤维混凝土能够满足深井高强井壁对混凝土高性能特性需求。

       

      Abstract: To improve the brittleness characteristics of high strength shaft lining concrete, CF80 high strength steel fiber shaft lining concrete was prepared, and its basic mechanical properties and triaxial compressive strength were studied. The experimental results showed that the tensile strength increased by 47.0% to 68.3% when 20 kg/m3 to 40 kg/m3 steel fiber was added to the concrete, which obviously improved the brittleness characteristics of high-strength concrete; the change of steel fiber content had little effect on the cubic compressive strength and axial compressive strength of high strength concrete, and had little effect on the elastic modulus and poisson’s ratio. The triaxial compression tests show that the addition of steel fiber can improve the peak strain and residual strength of specimens and significantly improve the failure morphology of specimens. Therefore, high-strength steel fiber concrete can meet the high-strengh and high-performance demands of shaft lining concrete.

       

    /

    返回文章
    返回