知识与财富的链接
针对旧水泥路面加铺沥青面层易出现反射裂缝问题,本文提出在旧水泥混凝土路面上铺筑水泥-泡沫沥青半柔性混合料再铺筑沥青面层,可显著降低面层开裂的可能性.为合理指导路面结构设计,论文采用ANSYS有限元软件进行路面结构力学计算,研究水泥-泡沫沥青半柔性混合料对路面结构力学的响应.研究得出旧水泥板上加铺水泥-泡沫沥青半柔性材料,可显著减弱沥青面层层底拉应力及层内最大剪应力,可有效缓解沥青层的反射裂缝的出现,同时还可以显著降低沥青面层对旧水泥板裂缝宽度的敏感性.在旧水泥混凝土板上加铺水泥-泡沫沥青半柔性混合料,其厚度不宜低于8 cm.
Aimed at the problem that old concrete pavement overlayed with asphalt surface is prone to reflective cracking, the paper proposed that the old concrete pavement overlayed with the semi-flexible mixture of cement-foam asphalt should significantly reduce the possibility of surface cracking. In order to guide pavement structure design, the paper studied the mechanical performance of the old concrete pavement by using ANSYS finite-element method , and got the conclusion that the method would significantly reduce the tensile stress and maximum shearing stress in asphalt layer and relieve the cracking of the asphalt pavement. In addition, it would reduce the sensitivity of asphalt surface crack width of the old cement board. The thickness of semi-flexible mixture material paved on the old concrete pavement should not less than 8cm.
