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沥青混凝土路面在高温下的耐剪性与道路交通荷载和行车密度的增长有关。路面塑性变形所产生的波浪、拥包及车辙不仅造成运输营运费用的增加,而且还降低了行车的安全性,所以这一问题迫切需要加以解决。在许多高度发达的国家中,为提高沥青路面的耐剪性,都使用各种聚合物外掺剂,尽管沥青混凝土混合料的成本要明显增加。聚合物的品种多种多样,但主要是能够与沥青有良好相容性的热弹塑性聚合物和热塑性聚合物。显然,不同品种的聚合物对沥青混凝土耐剪性提高的程度是有所区别的。各种级配组成的沥青混合料使用聚合物
The shear resistance of asphalt concrete pavement at high temperature is related to the increase of road traffic load and driving density. The waves, bagging and rutting caused by the plastic deformation of pavements not only cause the increase of transport operating costs, but also reduce the driving safety. Therefore, this problem urgently needs to be solved. In many highly developed countries, various polymer admixtures are used to increase the shear resistance of asphalt pavement, although the cost of asphalt mixture is significantly increased. There are a wide variety of polymers, but mainly thermoelastic polymers and thermoplastic polymers that have good compatibility with asphalt. Obviously, different varieties of polymers to improve the degree of shear resistance of asphalt concrete is different. Asphalt mixtures of various gradients use polymers