ASPHALT PAVEMENT BODY PROVIDED WITH RISING SUPPRESSING FUNCTION FOR ROAD SURFACE TEMPERATURE, ASPHALT ROAD SURFACE STRUCTURE AND FORMING METHOD FOR ASPHALT PAVEMENT BODY

摘要

PROBLEM TO BE SOLVED: To solve problems of not being able to find an effective countermeasure in suppression of a heat island phenomenon and difficulty in disposing particulate silica sands.;SOLUTION: An asphalt mixture having a water permeating function and 15-25% in volume percent of voids is used in a porous surface layer. By providing the particulate silica sands 4, 4a, etc., having water permeability, water pumping capability and water retentivity in a filled state with a mean particulate diameter of 80-200 m and filling 80-160 kg of them per volume of 1 m³ of the asphalt pavement body 2 in the voids, a plurality of fine continuous voids are formed in a pavement body interior. A water pumping function from a lower face to a top face of the pavement body is provided by the formed continuous voids, moisture pumped to a surface by capillarity is vaporized, heat of vaporization is absorbed from a periphery and the pavement surface is cooled. By using the particulate silica sands disposed as industrial byproducts for filler, the environment is protected.;COPYRIGHT: (C)2003,JPO