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水泥-泡沫沥青混合料具有半柔性的特点,将其用于旧水泥混凝土路面加铺具有巨大优势。通过三维有限元模型系统分析了沥青加铺层厚度,水泥-泡沫沥青混合料材料厚度、模量,地基模量,旧水泥混凝土板接缝宽度等因素变化对沥青层最大拉应力、剪应力和路表弯沉的影响规律。指出水泥-泡沫沥青层厚度不宜低于8cm,模量宜在800~1200MPa。
Cement-foam asphalt has the characteristics of semi-flexible, which will be used in the old cement concrete pavement has a huge advantage. Through the three-dimensional finite element model system, the influences of the factors such as the thickness of asphalt overlay, the thickness of cement-foam asphalt mixture, modulus, the modulus of foundation and the joint width of old cement concrete slab on the maximum tensile stress, shear stress and Influence of road surface deflection. It is pointed out that the thickness of cement-foam asphalt layer should not be less than 8cm, and the modulus should be 800 ~ 1200MPa.