蓄盐类抗凝冰沥青混合料长效性评价

冰雪灾害是影响道路运输效率和生命财产安全的主要因素,主动解决此问题的蓄盐类抗凝冰路面技术应用十分广泛,但又鲜有长效性评价相关研究.从力学角度探究凝冰与蓄盐抗凝冰沥青混合料界面黏结力,提出蓄盐抗凝冰沥青混合料除冰雪性能失效的临界有效氯离子浓度;通过全环境箱模拟车辆荷载和降雨条件下氯离子的释放特性,采用离子选择电极法(io...

Evaluation of the Long-term Performance of Salt Storage Anti-icing Asphalt Mixture

In this study, the ice-interface bonding force of the salt storage anticoagulant ice asphalt mixture was investigated from the mechanical perspective, and the critical effective chloride ion concentration of the ice removal performance failure of the salt storage anticoagulant ice asphalt mixture was proposed. Through the whole simulation vehicle load and environment under the condition of rainfall release characteristic of chlorine ion, chlorine ion was tested by ISE single release concentration and cumulative release concentration, according to determine the critical concentration of available chlorine ion release effective salt effective cycle of asphalt mixture, and the failure of the regenerative asphalt mixture of salt slice processing, the actual release depth of chlorine ion in the mixture; Finally, the simulated precipitation in the test box is converted into the annual average precipitation in different regions of the country, and the actual service life of salt storage and anti-freezing ice asphalt pavement is estimated. The results show that the critical effective chloride ion concentration is 0.0009mol/L at the test temperature. Under the full simulation state, the effective action period of salt storage asphalt mixture is 45 cycles, and the effective action depth of chloride ion in the mixture is about 2cm. The effective total rainfall of snow melting and ice suppression for anti-condensing ice asphalt pavement is 2245.5ml. According to the ratio of the effective total rainfall to the annual rainfall in different regions, the effective action period of snow melting and ice suppression for anti-condensing ice pavement is 1.79~3.72 years.