用热力学方法评价矿粉对沥青-骨料界面的影响

发布时间：2018-03-08 02:34

本文选题：矿粉　切入点：表面自由能(SFE)　出处：《中外公路》2014年02期 　论文类型：期刊论文

【摘要】：热拌沥青混合料中加入矿粉会使混合料的性质发生改变,该文重点分析矿粉对沥青-骨料界面热力学性质的影响。选用7种沥青、3种矿粉和6种骨料,利用其各自的表面自由能分量计算相应的能量参数。通过测试沥青、矿粉和骨料各自的表面自由能并计算相应的能量参数,评价矿粉对热拌沥青混合料沥青-骨料界面的影响。结果表明:加入矿粉会导致沥青胶浆-骨料体系的抗裂性能、抗水损害能力以及沥青对骨料的润湿性能改变。鉴于现有的测试手段只能测试矿粉的颗粒大小、有害成分、形态等特性而不能对其进行全面评价,提出在混合料设计过程中通过表面自由能测试和能量参数计算来表征矿粉和沥青胶浆,从而优化混合料设计。
[Abstract]:The properties of hot mix asphalt mixture can be changed by adding mineral powder. The influence of mineral powder on the thermodynamic properties of bitumen aggregate interface is analyzed in this paper. Seven kinds of bitumen, 3 kinds of mineral powder and 6 kinds of aggregate are selected. The corresponding energy parameters are calculated by using their respective surface free energy components. The surface free energy of asphalt, mineral powder and aggregate is measured and the corresponding energy parameters are calculated. The effect of mineral powder on the bitumen aggregate interface of hot mix asphalt mixture was evaluated. The results showed that the addition of mineral powder would result in the crack resistance of asphalt paste aggregate system. The ability to resist water damage and the wettability of asphalt to aggregate can be changed. Since the existing means of testing can only test the particle size, harmful composition, morphology and other properties of ore powder, it cannot be comprehensively evaluated. In order to optimize the mixture design, the surface free energy test and energy parameter calculation are used to characterize the mineral powder and asphalt slurry in the process of mixture design.
【作者单位】：交通铺面材料教育部工程研究中心
【分类号】：U414

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