导电超薄抗滑磨耗层长期性能试验研究

摘要

采用加速加载试验、冻融循环试验测试了导电超薄抗滑磨耗层在冻融、水压及重复荷载等因素作用下的导电和抗滑性能的长期耐久性.结果表明:导电超薄抗滑磨耗层初始电阻率为4.18×10-3Ω·m,3次冻融循环后变为4.15×10-3 Ω·m,经冻融与100万轴次累积荷载耦合作用和50万轴次浸水加速加载后电阻率分别增大5.0％与2.5％;导电超薄抗滑磨耗层初始摩擦摆值为65～67 BPN,经冻融与100万轴次累积荷载耦合作用和50万轴次浸水加速加载后摩擦摆值分别衰减10.0％与6.0％,即导电超薄抗滑磨耗层在导电和抗滑性能方面均具有良好的耐久性;在36V供电条件下,导电超薄抗滑磨耗层发热功率为427.7W/m2(电极间距2 m),可满足路面融冰雪需要.%Long-term performance of skid resistance and conductivity of conductive ultra-thin anti-skidding wearing course(CUAWC) under freezing-thawing cycles,soaking and repeated loading were evaluated by model mobile load simulator(MMLS3) and freezing-thawing tests.Results show that the initial resistivity of the CUAWC is 4.18×10-3Ω · m,while the resistivity reduces to 4.15×10-3 Ω · m after three freezing-thawing cycles.The resistivity of the CUAWC increases by 5.0 ％ after the coupling action of freezingthawing cycles and 1 million cumulative load,and rises by 2.5％ after 500 thousand cumulative soaking load.Moreover,the initial BPN value of the CUAWC is within 65-67 BPN,while BPN value decreases by 10.0％ after the coupling action of freezing-thawing cycles and 1 million cumulative load,and reduces by 6.0％ after 500 thousand cumulative soaking load.The test results indicate that CUAWC has good long-term performance of skid resistance and conductivity.In addition,the heating power of CUAWC with 2 m electrode gap can reach 427.7 W/m2 at 36 V,which meets the need for melting ice and snow on road surface.