关键词: 基层;水泥稳定碎石;粉尘;抗压回弹模量;弯沉;弯拉应力

Abstract: In order to study the effect of dust on the mechanical properties of cement stabilized crushed stone base with different mass fraction,and to determine the appropriate range of dust content.The compressive resilience test and finite difference numerical software FLAC3D were used,the dust content of 1％-5％of the cement stabilized gravel base and pavement structure to carry on the numerical simulation.The anti-deformation ability of cement stabilized crushed stone base and the changing law of the stress and strain of pavement were analyzed.Through the comparison with the basic type,it is concluded that the dust content in cement stabilized crushed stone with no more than 3％can meet the requirements of technical specifications and reduce environmental pollution.

Key words: base layer;cement stabilized crushed stone;dust;compressive resilient modulus;deflection;bending tensile stress