沥青混凝土作为路面建筑材料,它的最大问题是与温度有关的强度、形变性和流变性。夏天高温时,沥青混凝土中的沥青粘度要降低,矿料间的粘结力要减弱,因此,沥青混凝土本身的强度、粘度和相对滞留速度(动力特性P_2)都要降低,而它的塑性和相对松弛速度(动力特性P_1)都要提高。在这种情况下,沥青混凝土路面很可能出现剪切变形,例如波浪和拥包,尤其在停车站和刹车处最容易出现这种现象。沥青的粘度增加,矿料间的粘结力增强,同时也出现了脆性。这时沥青混凝土的强度、粘度和相对滞留速度提高了,而相对松弛速度降低了。因此,路面很容易产生温度变形裂缝。为减轻温度对沥青混凝土性能的影响,通常在沥青混凝土中加入外掺材料,如橡胶 Asphalt pavement construction materials, its biggest problem is temperature-related strength, deformation and rheology. When the asphalt is hot in summer, the viscosity of asphalt in asphalt concrete will be reduced and the bond strength between mineral materials will be weakened. Therefore, the strength, viscosity and relative retention speed (dynamic characteristics P_2) of asphalt concrete itself should be reduced. Relative relaxation speed (dynamic characteristics P_1) should be increased. In this case, asphalt concrete pavement is likely to be sheared and deformed, such as waves and overshoes, especially at stops and brakes. Asphalt viscosity increases, the bond between the mineral material enhanced, but also appeared brittle. At this time asphalt concrete strength, viscosity and relative retention rate increased, while the relative relaxation rate decreased. Therefore, the road is prone to temperature deformation cracks. In order to reduce the influence of temperature on the performance of asphalt concrete, commonly used asphalt concrete is added with admixture materials such as rubber