Abstract
Heat characteristics of permeable pavement using wasted roof tiles were measured to show its efficiency as measures for heat island phenomenon. Results of laboratory experiments showed that roof tile pavement made of crushed roof tiles was supposed to have enough permeability and water retentivity. Field monitoring of temperature and water content was executed at test area of roof tile pavement being compared to neighboring asphalt pavement. The results showed that daily maximum temperature of the surface of roof tile pavement at high solar insolation in the summer was lower than that of asphalt pavement in spite of its lower heat capacity and heat conductivity compared to those of asphalt pavement. This phenomenon could be explained by the effect of latent heat flux from the water retentive roof tile pavement. It was supposed to be necessary to simulate heat flux and water flux simultaneously in the matrix of roof tile pavement to evaluate its efficiency as measures for heat island phenomenon quantitatively.
