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Outdoor performance tests of self-cooling concrete paving stones for the mitigation of urban heat island effect

机译：自冷混凝土铺路石缓解城市热岛效应的室外性能测试

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摘要

Rising temperatures worldwide pose an increasing challenge for safe and healthy living conditions. Particularly inner cities have been affected by these environmental changes because of the materials used to build houses, streets and infrastructure. The most common building material is concrete. It shows a specific heat capacity, while the heat conductivity for standard concrete is low. Thus, the use of concrete generates a high capacity of heat storage. In addition, extensive soil sealing also contributes to the temperature rise of inner city areas compared to their surroundings. To mitigate this so-called urban heat island effect, a self-cooling concrete paver was developed. This paver is able to store water. The evaporation of the water at elevated temperatures provides a cooling effect. This paper focuses on determination of this new paver's capability to cool the surface and the surrounding. The new paver's cooling qualities were analysed in a series of laboratory tests. To prove the results outside of laboratory conditions, two fields (12mx8m) with self-cooling and reference pavers were installed in Spain. This paper presents and discusses the results of the tests. Correlation between reduced surface temperature of the self-cooling concrete pavers and the air temperature is examined.
机译：全球气温的升高对安全健康的生活条件构成了越来越大的挑战。由于用于建造房屋，街道和基础设施的材料，特别是内城区受到了这些环境变化的影响。最常见的建筑材料是混凝土。它显示出特定的热容量，而标准混凝土的导热率较低。因此，混凝土的使用产生高的蓄热能力。此外，与周围环境相比，广泛的土壤密封还导致内城区温度升高。为了减轻这种所谓的城市热岛效应，开发了一种自冷式混凝土摊铺机。该摊铺机能够储存水。在升高的温度下水的蒸发提供了冷却效果。本文着重于确定这种新型摊铺机冷却表面和周围环境的能力。在一系列实验室测试中分析了新摊铺机的冷却质量。为了在实验室条件之外证明结果，在西班牙安装了两个带自冷却和参考摊铺机的田地（12mx8m）。本文介绍并讨论了测试结果。研究了自冷混凝土摊铺机降低的表面温度与空气温度之间的关系。

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