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本文针对钢桥桥面在行车荷载和温度综合作用下的应力应变特征,提出了一种EVA改性沥青结合料,改善了重交道道路沥青的低温可变形能力和高温稳定性能.通过对沥青混凝土混合料的马歇尔稳定度、低温抗弯拉强度、高温蠕变性能、重复疲劳强度和动载、静载作用下的粘结强度等专项试验,综合论证和评叙了这种复合改性沥青混凝土的路用性能.并且已应用到主要道路干线的钢桥面层结构中,呈现出良好的使用状态.
In this paper, aiming at the stress-strain characteristics of steel bridge decks under the action of driving load and temperature, an EVA modified asphalt binder is proposed to improve the low-temperature deformability and high-temperature stability of asphalt pavement. Marshall stability of the mixture, low temperature bending strength, high temperature creep properties, repeated fatigue strength and dynamic load, static load under the bond strength and other special tests, comprehensive demonstration and evaluation of the composite modified asphalt concrete Of the road performance and has been applied to the main road main steel deck structure, showing a good state of use.