级配碎石力学特性试验研究

Experimental research on strength properties for grading crushing stones

通过级配碎石的CBR试验、重复动三轴试验,研究了级配指数n值和最大粒径Dmax对级配碎石最大干密度的影响,以及影响连续级配碎石CBR值和回弹模量的因素,结果表明:n值的变化对级配碎石最大干密度的影响程度要大于最大粒径变化的影响;影响连续级配碎石CBR值的因素主要有n值和最大粒径;影响级配碎石回弹模量的因素主要有应力状态、含水量等。

The paper researched the influence of n value and maximum size to maximum Dmax dry density of grading crushing stones, as well as the influence factors to CBR value and modulus of resilience by the CBR tests and Repeated Load Tri-axial Tests. The results indicate that the influence to CBR value as the change of n value is bigger than the influence as the change of maximum size. The influence factors to CBR value include two aspects, one is the n value, the other is the maximum size. The influence factors to modulus of resilience mainly include stress, water content and so on.