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在分析钢桥面铺装层主要病害和特殊工作环境的前提下,分别采用高温车辙试验、低温小梁弯曲试验和控制应力小梁弯拉疲劳试验,研究了不同环氧树脂掺量下的环氧树脂改性沥青混合料的高温稳定性、低温抗裂性和抗疲劳性能.试验结果表明:环氧树脂对这3个方面都有很大的改进效果,但改性效果和树脂的添加量并不是一个无限递增的关系,当添加量超过一定数值以后,改性的效果将趋于平稳.最后就高温、低温、疲劳3个方面分别提出环氧树脂添加量为20%,30%,30%的建议值.
Under the premise of analyzing the main diseases and the special working environment of the steel bridge deck pavement, the high-temperature rutting test, the low-temperature trabecular bending test and the bending-stress fatigue test of the controlled stress trabecular were carried out to study the effects of different epoxy resin contents Oxygen resin modified asphalt mixture has high temperature stability, low temperature crack resistance and fatigue resistance.The experimental results show that the epoxy resin has a great improvement on these three aspects, but the modification effect and resin addition It is not an infinitely increasing relationship.When the added amount exceeds a certain value, the modification effect will tend to be stable.Finally, the epoxy resin dosage is 20%, 30% and 30% respectively in the three aspects of high temperature, low temperature and fatigue % Of the recommended value.