| The quality and life-span of bituminous concrete pavement with semi-rigid base will be reduced badly when rutting and crack occur early in it. In this paper, the multi-layer elastic system theory is employed to analyze the pavement response and some conclusions are drawn: the low temperature crack resistence thickness range of asphalt pavement, the pavement assembling with resistence to rutting at high temperature and the function of each layer asked to take on. Because the nether pavement compress is a majority of rutting, some steps are taken to increase the stability of mixture at high temperature. Coarse aggregate content, dust proportion, the dosage of 4.75mm and progression fine influence the mixture risistence to rutting greatly and the ranges of them are given in this paper. In the end, the structural and material design are incorporated and a optimum pavement type is gained. |
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