缓释自融雪沥青混合料性能研究

发布时间：2018-02-22 10:20

本文关键词： 积雪冻结路面自融雪抑制冻结剂路用性能　出处：《大连海事大学》2015年硕士论文　论文类型：学位论文

【摘要】：季冻区冬季积雪冻结路面行车安全问题是亟待解决的一大难题,如何科学有效的抑制路面冻结,得到了各界人士的关注。缓释自融雪沥青路面是将抑制冻结材料替代部分(或全部)填料或者直接添加到沥青混合料中,铺设而成的新型沥青路面,沥青混合料中的有效成分由于毛细作用以及车辆碾压缓慢释放,降低了路表水的冰点,抑制道路积雪结冰,从而达到自融雪效果。本文选取MFL以及V-260两种自融雪剂进行研究,采用马歇尔设计方法确定沥青混合料的配合比,MFL利用等体积置换矿粉的方法添加到沥青混合料中,V-260则采用按比例直接掺加的方法添加到沥青混合料中。通过马歇尔试件的自然浸泡试验研究其有效成分的释放规律以及空隙率变化,并与掺加未经缓释处理除冰盐的试样作对比,结合浸水马歇尔试验水稳定性指标分别确定两种抑制冻结材料的最佳掺量。从沥青胶浆入手,通过BBR与DSR试验,研究沥青胶浆的高低温流变性能。并对缓释自融雪沥青混合料的路用性能,短期融雪效果以及长期融雪效果进行了进一步研究,通过长周期氯离子释放试验,建立回归模型估算缓释自融雪沥青路面的有效使用年限。
[Abstract]:It is a difficult problem to solve the problem of driving safety in winter snow freezing road in seasonal freezing area. How to restrain the road freezing scientifically and effectively is a big problem to be solved. Slow release snowmelt asphalt pavement is a new type of asphalt pavement, which replaces some (or all) of the frozen material and replaces some (or all) of the filler, or directly adds to the asphalt mixture. Due to the capillary effect and the slow release of vehicle rolling, the effective components of asphalt mixture reduce the freezing point of road surface water, restrain the road snow icing, and achieve the effect of self-melting snow. In this paper, MFL and V-260 are selected to study the effect of self-melting snow. The Marshall design method was used to determine the mix ratio of asphalt mixture MFL was added to the asphalt mixture by replacing mineral powder with equal volume, and the proportional direct mixing method was adopted to add the V-260 to the asphalt mixture. The natural immersion test of the samples was conducted to study the release law of the active components and the change of the porosity. And compared with the sample with untreated deicing salt, combined with the water stability index of immersion Marshall test, the optimum amount of two kinds of frozen materials was determined. Starting from the asphalt mortar, the BBR and DSR tests were carried out. The rheological properties of asphalt mortar at high and low temperature were studied. The road performance, short-term snowmelt effect and long-term snowmelt effect of slow-release self-melting asphalt mixture were further studied, and the long-period chloride release test was carried out. A regression model was established to estimate the effective service life of slow-release snowmelt asphalt pavement.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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