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为了更好地理解沥青混合料的路用行为和病害机制,从沥青及胶泥流变特性入手,利用灰关联分析方法,探讨了沥青流变特性与沥青混合料之间的关系。结果证明,在对比的19个材料性能指标中,沥青针入度、延度、3 200 Pa应力重复蠕变试验的关联度最低;软化点和黏度关联度较高;相对于常规指标,沥青和胶泥的流变学指标与混合料性能的关联度普遍较好,在混合料强度方面,沥青的劲度模量、屈服应力、老化样品100 Pa应力重复蠕变试验和车辙因子具有高关联度,均大于98%;混合料的冻融劈裂强度比TSR更容易受到试件空隙率、胶泥界面黏结力系数、法向力等指标的影响。这些材料流变学指标在一些路面病害和结构行为中具有更好的说明意义。
In order to better understand the road behavior and disease mechanism of asphalt mixture, starting with the rheological properties of asphalt and clay, the relationship between asphalt rheological properties and asphalt mixture was discussed using gray correlation analysis method. The results show that among the 19 material performance indexes, the correlation degree of bitumen penetration, ductility and 3 200 Pa stress repeated creep test is the lowest. The softening point and viscosity have a higher degree of correlation. Compared with the conventional indexes, The rheological indexes of the clay are generally better than those of the mixture. The stiffness modulus of asphalt, yield stress, repeated stress creep test of 100 Pa in aging samples and rutting factor have a high correlation in the strength of the mixture, Which is more than 98%. The freeze-thaw splitting strength of the mixture is more affected by the porosity, the cohesion coefficient of the clay interface and the normal force than the TSR. These material rheology indicators have better explanatory meanings in some pavement diseases and structural behaviors.