作　　者： (杨武）; (宋剑鹏）; (何建新）; (杨海华）;

机构地区： 新疆农业大学水利与土木工程学院,乌鲁木齐830052

出　　处： 《粉煤灰综合利用》 2017年第4期6-8,共3页

摘　　要： 沥青混凝土作为悬浮密实型结构,其剪切特性受密度及应力水平的影响。沥青混凝土的剪胀性将会对其内摩擦角,凝聚力,峰值强度及渗透系数有很大的影响。通过静三轴试验后孔隙率的变化情况表明,随着围压的增加,沥青混凝土的剪胀性变得明显,孔隙率增加明显;骨料在围压为2MPa时,骨料并不会发生破碎,通过测定试样的孔隙率得出,增加的孔隙率均为产生的空隙。 Asphalt concrete is a kind of suspended dense structure, and its shear behavior is affected by density and stress level. The dilatancy of asphalt concrete has great influence on the internal friction angle, cohesion, peak strength and permeability coefficient. Porosity changes through static triaxial test,which shows that with the increase of confining pressure, dilatancy of asphalt concrete become apparent and porosity increased significantly; under confining pressure of 2MPa, the aggregate isn＇t crushed, By measuring the porosity of the sample after the test, it shows that increased porosity are produced void.

关 键 词： 沥青混凝土 静三轴 孔隙率 剪胀性