Cyclic Heat Island Impacts on Traditional Versus Pervious Concrete Pavement Systems
Cyclic Heat Island Impacts on Traditional Versus Pervious Concrete Pavement Systems
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DOI：
10.3141/2240-14
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发表时间：
2011-01-01
影响因子：
1.7
通讯作者：
Schaefer, Vernon R.
中科院分区：
文献类型：
--
作者：
Haselbach, Liv;Boyer, Michelle;Schaefer, Vernon R.
随着世界变得更加城市化，人们对城市热岛(UHI)的担忧更加明显。城市温度升高对自然和人类环境产生了负面影响，因为它增加了能源消耗，形成了烟雾。透水混凝土路面是一种可能有助于缓解城市气温上升的技术。文中给出了爱荷华州一个仪表站的温度数据和各种天气模式下的储热现象。该场地既有透光混凝土路面，太阳反射指数(SRI)为14，也有传统混凝土路面，SRI为37。能源与环境设计领导学会(LEED)接受了高SRI(>；29)作为表征凉爽表面的一种方法。对两个系统的热容进行了研究，并对输入进行了灵敏度分析。这项研究支持的结论是，尽管透水混凝土的SRI可能比使用类似材料的传统混凝土低得多，但它可以被认为是一种很酷的路面选择。此外，白天的降雨与内部高表面积相结合，显著增加了系统储存的热量，从而更快地缓解了城市热岛的影响，并减少了不透水地表径流产生热冲击的可能性。
As the world becomes more urbanized, concerns over the urban heat island (UHI) are more pronounced. Increased urban temperatures have a negative affect on the natural and human environment by producing increased energy usage and smog formation. Pervious concrete pavement is one technology that may help mitigate increased urban temperatures. Temperature data from an instrumented site in Iowa and heat storage phenomena for various weather patterns are presented. The site contains both pervious concrete pavement with a solar reflectance index (SRI) of 14 and traditional concrete pavement with an SRI of 37. Leadership in Energy and Environmental Design (LEED) accepted a high SRI (>29) as one method to characterize a cool surface. Heat capacities of both systems were studied along with a sensitivity analysis of the inputs. The research supports the conclusion that even though pervious concrete may have a much lower SRI than traditional concrete made with similar materials, it can be considered a cool pavement option. In addition, daytime rainfalls combined with the internal high surface area result in significantly more removal of stored heat from the system, with a more rapid mitigation of UHI impacts and reduction in the potential for thermal shock from impervious surface runoff.