Abstract
The Semi-Flexible Water Retaining Pavement (SFWRP) has the capability to cool down the temperature of the road surface through its evaporation behavior, including absorbing and evaporating water; this is an efficient approach to relieve the heat island effect in a big city. The temperature feedback from different material surface were investigated in this paper in the same test condition, it has been proved that the SFWRP material can remarkably cool down the temperature of the road surface. The mechanism of the material evaporation behavior, including flux calculation formula of the water vapor inside the air void, were studied by inter-phase continuous function, in which the structural properties of the SFWRP material was taken into account. Furthermore, the function calculating the evaporation of the water vapor was then developed in this research through heat and mass transfer analogy. Besides, the calculating results can be captured by the self-coding program in Finite Element Modeling (FEM) for water evaporation simulation. Also, the results of laboratory tests were adopted to validate the calculating model. Finally, it has been proved that the mortar was recommended to be used in semi-flexible water retaining pavement to serve as material with permeable and water retaining property, and the semi-flexible water retaining pavement material is recommended to applied in the surface layer of the permeable pavement.
| Original language | English |
|---|---|
| Article number | 2546 |
| Journal | Materials |
| Volume | 12 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 9 Aug 2019 |
Bibliographical note
Funding Information:This research was funded by Special project of science and technology innovation of social undertakings and people's livelihood guarantee in Chongqing: Application of high-viscosity rubber-plastic copolymer modified asphalt in permeable and water-retaining paving of sponge city (Grant No. cstc2017shmsA0727). This research was also funded by Chongqing Key Laboratory of Mountain Road Construction and Maintenance Technology, Chongqing Jiaotong University: Development and Performance Study on the application and performance of Water-Retaining Pavement Materials (Grant No. CQMRCM-10-3). The corresponding author of this paper (Chonghui Wang) was also supported by the China Scholarship Council (Grant No. 201706560034).
Keywords
- Evaporation
- Numerical simulation
- Pavement engineering
- Road surface
- Semi-flexible water retaining pavement
- Thermalmass coupling