多孔混凝土磨耗性试验方法对比研究

发布时间：2018-11-22 09:46

【摘要】：多孔混凝土近年来在混凝土路面的使用量不断增加。除了强度和渗透性,耐磨性是多孔混凝土的另一个重要的特性。在该研究中,研究了3种可用于评价多孔混凝土耐磨性的室内磨耗试验方法。3个试验为Cantabro试验,负荷轮磨耗试验,及表面磨耗试验。为评估这3种试验方法,对采用不同粒径粗集料和外加剂的8种多孔混凝土进行了试验。3种磨耗试验的比较表明,3种试验均可有效地区分多孔混凝土。然而,Cantabro试验结果似乎并不能反映混凝土的耐磨性,因为Cantabro试验中试样的破坏是由于冲击作用而不是磨耗。通过焊接钢钉和增加轮上荷载,负荷轮磨耗试验表现出最佳的灵敏度和可重复性。表面磨耗试验可成功地从其他多孔混凝土中区分出对照组,但并不能区分出含有乳胶和/或纤维的多孔混凝土,这可能是由于质量损失值较低,区分度较差。
[Abstract]:The use of porous concrete on concrete pavement is increasing in recent years. In addition to strength and permeability, wear resistance is another important characteristic of porous concrete. In this study, three kinds of indoor wear test methods for evaluating the wear resistance of porous concrete are studied. The three tests are Cantabro test, load wheel wear test and surface wear test. In order to evaluate these three test methods, eight kinds of porous concrete with different particle size coarse aggregate and admixture were tested. The comparison of three kinds of wear tests shows that the three tests can effectively distinguish porous concrete. However, the Cantabro test results do not seem to reflect the wear resistance of concrete because the failure of the specimens in the Cantabro test is due to impact rather than wear. By welding steel nails and increasing the load on the wheel, the load wheel wear test shows the best sensitivity and repeatability. The surface wear test can successfully distinguish the control group from other porous concrete, but it can not distinguish porous concrete containing latex and / or fiber, which may be due to the low mass loss value and poor differentiation.
【作者单位】：包头铁道职业技术学院;
【分类号】：U414

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