Abstract
In order to better understand heat and mass transfer in drainage bridge road equipped with a hydronic road heating system (HRHS), a series of experiments were conducted using a test piece of a bridge road with the HRHS, a drainage pavement, and a rainfall simulator. Main experimental outputs are the hydraulic conductivity of the porous pavement, percolation velocity, vertical temperature profile in a bridge road and aggregate temperature associated with the heat injection from the HRHS and precipitation. It is concluded that (i) the proposed experimental method and Dupuit's approximations can be a good combination to identify the hydraulic conductivity and percolation performance, (ii) percolation velocity is more than 100 times larger than rainfall intensity, (iii) thermal interactions between aggregate, percolation fluid and void air should be considered to evaluate the performance of the HRHS as an anti-icer or melting equipment.
