ABSTRACT

Heavy snowfall is the most influential factor in the interruption of road vehicular transit during the winter months, sometimes even causing inaccessibility to certain areas. Traditional maintenance strategies address this issue with mechanical solutions combined with the implementation of “de-icing salts”. However, these “de-icing” salts can cause severe damage to the local ecosystem and represent an unsustainable solution to the removal of snow. In order to offer an alternative to the use of “de-icing salts” in roadway maintenance, new environmentally friendly strategies need to be explored. The objective of this paper is to evaluate the thermal performance of electroconductive asphalt mortars under the effect of time-varying magnetic fields, with the aim of using these materials for anti-icing and de-snowing applications on roads. The electroconductive mortars studied were manufactured using the metallic fibres obtained from recycled pneumatic end-of-life vehicle tires. These innovative roadway mortars were tested by measuring the temperature changes produced during and after the activation of the time-varying magnetic field, in a 2-layer system composed of an electroconductive asphalt layer under a conventional bituminous surface course. The results revealed that road temperatures can be controlled depending on the intensity of the magnetic field, the content of metallic fibres and the thickness of the road surface course. Electroconductive mortars might therefore provide a functional alternative for maintaining serviceable roads during snowy winters.

摘要

大雪是冬季道路车辆运输中断的最重要因素，有时甚至导致某些地区无法进入。传统的维护策略通过机械解决方案结合“除冰盐”的实施来解决这个问题。然而，这些“除冰”盐会对当地生态系统造成严重破坏，是一种不可持续的除雪解决方案。为了提供在道路维护中使用“除冰盐”的替代方案，需要探索新的环保策略。本文的目的是评估导电沥青砂浆在时变磁场作用下的热性能，目的是将这些材料用于道路防冰和除雪应用。所研究的导电砂浆是使用从回收的废弃充气汽车轮胎中获得的金属纤维制造的。这些创新的道路砂浆通过测量时变磁场激活期间和之后产生的温度变化进行测试，该系统由传统沥青表面层下的导电沥青层组成的 2 层系统。结果表明，道路温度可以根据磁场强度、金属纤维含量和路面厚度进行控制。因此，导电砂浆可能为在下雪的冬天维护可用的道路提供一种功能性的替代方案。