旧水泥混凝土路面MHB碎石化后强度机理分析

多锤头破碎机(M u ltip le-H ead B reaker,简称MHB),是我国近年来日益广泛应用的一种旧水泥混凝土路面碎石化设备,其相应工艺也越来越完善。但经MHB碎石化后,碎石化层的粒径分布状况及其强度形成原理仍没有被深入分析。首先,从碎石化层的成型开始,通过外观界定,分析了碎石化后水泥混凝土板块各粒径分布层的强度形成原理,提出了咬合嵌挤理论。最后,对碎石化后水泥混凝土层的路面结构功能定位提出了对比分析结论,认为碎石化层可以直接作为新加铺沥青混凝土路面结构的基层或底基层,能满足新加铺路面结构的要求。

Analysis of Intensity Mechanism of Old CCP Slab Rubbled by Multiple-Head Breaker

The multiple-head breaker is a new type of equipment which is introduced into China for several years and used increasingly on highway projects,its technics is more and more mature.But the intensity principle of rubblized slab is still not analyzed and unclear.The formation of rubbled slab is analyzed firstly,through distinguishing of profile,the layers are divided by particle size,their intensity principles are explained,and the theory of embedding and occluding is put forward.Last,the function of rubbled slab is ascertained,it shows that rubbled slab can be taken directly as base layer or under base layer,and meet the needs of new pavement.