The thermal behavior of 12 standard and cool pavement structures (asphalt, granite, stabilized sand, cobblestones, reflective paints, pervious concretes, dry grass, etc.) coupled with pavement-watering is studied in the lab under heat-wave-like conditions. Watering is fine-tuned for each structure to maximize cooling and minimize water consumption using two linear cooling regimes, before deployment in the field. The surface heat budget is closely studied and the partitioning of irradiance and net radiation into conductive, convective, radiative and cooling flux at surface is analyzed for each structure. Energy partitioning, surface temperature increase and optimal watering rates all exhibit good correlation with overall surface absorptivity. The transmitted flux at varying depths is also characterized using a transmission index that includes surface absorptivity and apparent conductivity of the traversed layers. Results of this study intend to improve our understanding of the energy balance of cool pavements compared to traditional ones under given weather conditions, as well as that of processes involved in the optimization of their evaporative cooling versus watering rate. Benefits of each pavement, efficiency of the method, limitations of the protocol and its potential transposition to the field are all discussed in this contribution.

在类似热浪的条件下，在实验室中研究了12种标准和凉爽的路面结构（沥青，花岗岩，稳定的沙子，鹅卵石，反光涂料，透水混凝土，干草等）的热行为以及路面浇水。在现场部署之前，使用两种线性冷却方案对每个结构的浇水进行了微调，以最大程度地冷却并最大程度地减少水的消耗。仔细研究了表面热收支，并分析了每种结构在表面的辐照度和净辐射向传导，对流，辐射和冷却通量的分配。能量分配，表面温度升高和最佳浇水速率均与总体表面吸收率表现出良好的相关性。还使用传输指数来表征在不同深度处的传输通量，该传输指数包括表面吸收率和被遍历层的表观电导率。这项研究的结果旨在增进我们对给定天气条件下凉爽路面与传统路面的能量平衡的了解，以及与蒸发冷却相对于浇水速率的优化相关的过程的能量平衡。在此文稿中讨论了每个人行道的好处，方法的效率，协议的局限性及其在田间的潜在换位。以及优化蒸发冷却与浇水速度有关的过程。在此文稿中讨论了每个人行道的好处，方法的效率，协议的局限性及其在田间的潜在换位。以及优化蒸发冷却与浇水速度有关的过程。在此贡献中讨论了每个人行道的好处，方法的效率，协议的限制及其在现场的潜在转换。