WATER RETENTIVE PAVEMENT MATERIAL, WATER RETENTIVE PAVEMENT STRUCTURE, WATER RETENTIVE PAVEMENT BLOCK, WATER RETENTIVE PAVEMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a water retentive pavement material, a water retentive pavement structure, a water retentive pavement block, and a water retentive pavement method which have water permeability and water retentivity in common and are capable of releasing temperature increase and inexpensively and easily executing it for a water retentive pavement.;SOLUTION: A water permeable pavement material 14 made of aggregate 14a and a binder 14b is scattered around a water retentive pavement material 13, in which a water retention polymer having such a reversible temperature- dependant water absorptive and water desorbing characteristic that the water retentive material absorbs water to form a water retaining gel in a low temperature and desorbs water to shrink the water retaining gel in high temperature, is dispersed in a polyurethane foamed body to impart such a constitution that water like rainwater infiltrates inwards and is retained in the water retentive pavement material 13. When the temperature rises by sunshine, desorbed water from the water retentive gel is evaporated and deprives the gel of the evaporation heat to make it possible to cool the gel.;COPYRIGHT: (C)2003,JPO