PCC-PMCC复合式路面的结构设计与经济性分析

根据聚合物改性水泥混凝土(PM CC)的实测力学参数和试验路铺筑使用情况,讨论了PCC-PM CC复合式路面这种新型路面结构的经济性,并提出了面层厚度设计方法。结果表明:PCC-PM CC复合式路面可承受的累计轴载作用次数比普通水泥混凝土路面提高了55%以上,性价比增大幅度可以达到12%以上;结合式PCC-PM CC复合式路面面层总厚度应按照下面层PCC的模量和弯拉强度拟定,上下面层厚度的比值可按照上下面层模量反比、聚合物掺量和经济性确定。

Structural Design and Economic Analysis of PCC- PMCC Composite Pavement

According to the mechanics parameters,constructing and using of Polymer Modified Cement Concrete(PMCC),the economy of PCC(Portland Cement Concrete)-PMCC composite pavement which is a new type pavement structure is discussed in this paper.Moreover,the design method of pavement thickness is presented.The results show that the effect numbers of cumulative axle loading borne by PCC-PMCC composite pavement have improved 55% than common concrete pavement and the performance-price ratio elevates above 12%.In addition,the total thickness of combination PCC-PMCC composite pavement should be studied out by the module and flexure strength of lower pavement concrete,and then the thickness ratio of upper and lower pavement can be decided by the inverse ratio of upper and lower pavement module,polymer content and economy.