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目前,我国柔性路面多是采用纯沥青拌制的混凝土铺筑的,这种路面存在温度敏感性强,高温时易产生塑性变形、推挤、拥包,低温时抗裂性差,易开裂等问题,由于这些缺点,它无法满足当前交通运输向重载高速,大交通量方向发展的需要。许多国家(包括中国)对改善路用沥青的性能进行了或正在进行着其多方面探索其方法归纳为两个方面;
At present, most of the flexible pavement in our country is paved with concrete mixed with pure asphalt. Such pavement has the advantages of high temperature sensitivity, easy plastic deformation under high temperature, pushing and bagging, poor crack resistance at low temperature and easy cracking Because of these shortcomings, it can not meet the needs of the current transport to the direction of heavy-load high-speed, large traffic. Many countries, including China, have conducted or are in the process of improving the performance of road asphalt in various ways and have explored its methods in two aspects: