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对不同沥青含量的沥青混合料在不同击实温度下击实成型,研究击实温度与混合料各物理力学参数之间的相关关系。研究表明,击实温度对混合料空隙率、沥青饱和度影响较小,而对混合料密度、稳定度及流值有不同程度的影响,击实温度越高,流值越大,混合料稳定度与最大密度对应的油石比越大。击实温度对马氏韧性影响最为显著,马氏韧性是混合料抵抗荷载和变形的综合效果,因此击实温度对混合料稳定性和抗变形能力有重要影响,试验结果显示,当击实温度为125℃时,马氏韧性达最大值,之后随击实温度升高,马氏韧性降低。
The asphalt mixture with different asphalt content was compacted at different compaction temperatures to study the correlation between compaction temperature and the physical and mechanical parameters of the mixture. The results show that the compaction temperature has little effect on the voidage and asphalt saturation of the mixture, but has different effects on the density, stability and flow value of the mixture. The higher the compaction temperature is, the larger the flow value is, and the mixture is stable The greater the degree of oil to stone ratio corresponding to the maximum density. The compaction temperature has the most significant effect on the martensite ductility. The Martensite ductility is the composite effect of load resistance and deformation. Therefore, the compaction temperature has an important effect on the stability and anti-deformability of the mixture. The test results show that when the compaction temperature When 125 ℃, the maximum martensitic toughness, and then with the actual temperature, Markov toughness decreased.