基于粘聚力的沥青稳定碎石设计方法研究

Design Method of Asphalt Treated Base Asphalt Content Based on Cohesive Strength

针对沥青稳定碎石混合料对抗拉性能的要求,采用结合混合料抗压强度及抗拉强度的粘聚力法,确定沥青稳定碎石混合料的沥青用量,将结果与传统的马氏方法进行比较,并应用两种沥青膜厚度计算方法计算了有效沥青膜厚度,得出粘聚力法使混合料获得具有更好粘聚力的沥青膜厚,且沥青膜厚范围约为6.5μm^9.0μm。

Combining with compression strength and tensile strength,the cohesive strength method is applied to determine the asphalt content of asphalt treated base（ATB） for the purpose meeting ATB tensile performance.The results are compared with those of Marshall Method.Two calculation of asphalt film thickness are applied to calculate the thickness of asphalt film.The calculation results show that cohesive strength method force the admixture to attain the better thickness of asphalt film,the scope of film thickness is between about 6.5 μm～9.0 μm.