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为了深入研究由于集料内部含水导致的沥青路面内水损坏机理,本文建立了内水损坏的力学分析模型,首次将内水损坏分为沥青膜剥离和破裂两个过程,利用粘弹性理论和气体膨胀理论分别建立了它们的理论模型。根据克拉珀龙方程的推算,集料内含水将导致沥青膜在内部蒸汽压力作用下易被剥离;利用玻意耳定律整理出沥青膜应力方程,可绘制沥青膜膨胀曲线,从而判断破裂临界点。这一工作开辟了沥青路面水损坏新的研究方向,为内水损坏的研究奠定了基础,具有重要的理论与工程意义。
In order to further study the mechanism of water damage in asphalt pavement caused by the water inside the aggregate, a mechanical analysis model of water damage was established in this paper. For the first time, the internal water damage was divided into two processes of asphalt film peel and rupture. Using viscoelastic theory and gas Expansion theory established their theoretical model. According to the Clapton equation, water content in the aggregate will cause the asphalt film to be easily peeled off under the internal steam pressure. By using Boyle’s law, the asphalt film stress equation can be worked out, and the asphalt film expansion curve can be drawn to judge the critical value point. This work opens up new research directions of asphalt pavement water damage and lays the foundation for the study of water damage, which has important theoretical and engineering significance.