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首页> 外文会议>Cold regions engineering 2009 : Cold regions impact on research, design, and construction >Pervious Concrete and Porous Asphalt Pavements Performance for Stormwater Management in Northern Climates
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Pervious Concrete and Porous Asphalt Pavements Performance for Stormwater Management in Northern Climates

机译：北方气候下透水混凝土和多孔沥青路面性能对雨水的管理

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In northern climates, runoff from standard pavements has varying seasonal effects on the surrounding environment. Year-round runoff carries transportation associated contaminants into surface waters. During the winter and spring, deicing practices for pavements result in high levels of chloride-laden runoff that is both toxic to aquatic biota and degrades drinking water supplies. The use of pervious pavements for parking lots for new and redevelopment projects are one watershed-based strategy that can both mitigate impacts for new development and reverse impacts in areas with redevelopment. This study presents the findings from 2 pervious pavements, a pervious concrete and a porous asphalt parking lot, studied at the University of New Hampshire Stormwater Center. Winter in particular places great demands on pavements however it was observed that due to the well-drained nature of the reservoir base that freeze thaw was limited. Surface infiltration rates, frost penetration, degree of snow and ice cover, and surface friction were measured on a monthly basis to assess winter performance. Frost penetration was observed to reach depths of eighteen inches however, surface infiltration capacities remained in excess of 200-in/hr. Analysis of snow and ice cover and pavement skid resistance demonstrated that up to 75% less salt was needed for porous asphalt to maintain equivalent or better surface conditions as the reference dense mix asphalt lot. The annual median snow and ice surface cover for the porous asphalt lot was not significantly different than the reference lot with salt applications four times greater (p=0.749 @95% CI). The annual median weighted skid resistance for the porous asphalt lot was 12% greater than the reference lot with greater salt application (p=0.061 @95%CI). Pervious concrete did not demonstrate substantial salt reduction capabilities during storm events; however, 'black-ice' formation did not occur during freeze-thaw conditions indicating possible annual reductions. Pavement color and shading were found to be major factors influencing the amount and duration of snow and ice cover on the pervious concrete lot.
机译：在北部气候中，标准人行道的径流对周围环境有不同的季节性影响。全年径流将与运输相关的污染物带入地表水中。在冬季和春季，人行道上的除冰做法会导致高浓度的含氯径流，这对水生生物群有毒，还会使饮用水供应下降。在新建项目和重建项目的停车场中使用透水路面是一种基于分水岭的策略，既可以减轻对新建项目的影响，又可以减轻重建项目对区域的影响。这项研究提出了在新罕布什尔大学暴雨中心研究的2个透水路面，一个透水混凝土和一个多孔沥青停车场的发现。冬季尤其对人行道有很高的要求，但是据观察，由于水库底部排水良好，冻融受到了限制。每月测量一次表面渗透率，霜渗透度，雪和冰覆盖度以及表面摩擦，以评估冬季性能。观察到霜冻渗透达到十八英寸的深度，但是，表面渗透能力仍然超过200英寸/小时。对冰雪覆盖和路面抗滑性的分析表明，多孔沥青所需的盐最多可减少75％，以保持与参考密集混合沥青相同或更好的表面条件。多孔沥青批次的年中雪和冰表面覆盖率与参比批次相比无明显差异，而盐分施用量则大四倍（p = 0.749 @ 95％CI）。施用更多盐的情况下，多孔沥青批次的年平均加权抗滑性比参考批次高12％（p = 0.061 @ 95％CI）。透水性混凝土在暴风雨期间没有表现出明显的减盐能力；然而，在冻融条件下并未形成“黑冰”，表明可能每年减少。路面颜色和阴影是影响透水混凝土地块冰雪覆盖量和持续时间的主要因素。

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