沥青混合料动静态渗透性能研究

发布时间：2018-09-19 15:40

【摘要】：设计了一种沥青混合料动静态渗透试验系统,测量了40~350 kPa压力作用下沥青混合料的渗透系数和透水量,并分析了沥青混合料试件的空隙率与渗透系数的关系。研究结果表明:设计的沥青混合料动静态渗透试验系统可以测量较高水压力下沥青混合料的渗透性能;随着水头差(水压力)的变大,2种混合料渗透系数不断减小,但沥青混合料的透水量随着水压力的变大接近线性增加;各级动态水压力作用下沥青混合料的透水量远小于静态水压力作用下的透水量;对于SMA-13混合料,其动态透水量只达到同级水压力时静态的50%~75%;对于AC-20混合料,其动态透水量是同级静态的48%~56%;在1 Hz、10 Hz 2种频率作用下,其渗透性能变化很小;沥青混合料的渗透性能对水压力的变化频率不敏感,对水压力的峰值敏感。
[Abstract]:A dynamic and static permeability test system for asphalt mixture was designed. The permeability coefficient and permeability of asphalt mixture under pressure of 40 ~ 350 kPa were measured, and the relationship between porosity and permeability coefficient was analyzed. The results show that the dynamic and static permeability test system of asphalt mixture can be used to measure the permeability of asphalt mixture under high water pressure, and the permeability coefficient of two kinds of mixture decreases with the increase of water head difference (water pressure). However, the permeability of asphalt mixture increases linearly with the increase of water pressure. The permeability of asphalt mixture under different dynamic water pressure is much smaller than that under static water pressure. For SMA-13 mixture, For AC-20 mixture, the dynamic permeability is 48% of that of the same level, and the permeability of the mixture has little change under the action of 1 Hz,10 Hz 2 frequencies, and the dynamic permeability of the mixture is only 50 ~ 7575 when the water pressure is the same level, and the dynamic permeability of the mixture is 48 ~ 56% of that of the same level, and the dynamic permeability of the mixture has little change. The permeability of asphalt mixture is not sensitive to the change frequency of water pressure, but sensitive to the peak value of water pressure.
【作者单位】：南京航空航天大学航空宇航学院;日照市公路管理局;
【基金】：南京航空航天大学基本科研业务费项目(NS2013012)
【分类号】：U414

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