| 摘要 |
PROBLEM TO BE SOLVED: To improve the appearance by preventing the occurrence of blinding or fouling on the surface of a block by forming a plurality of grooves on the top surface of a porous block finished with a non-permeable surfacing material and permeating rain water from the side wall of the grooves. SOLUTION: A plurality of V-shaped grooves 3 are formed in parallel to each other on the top surface 2a of the main body 2 of a block as a base layer formed with porous concrete, and a surface layer material 4 comprising non- permeable mortar or the like is provided in forming the permeable paving block 1. Also, the groove 3 can have a wavy shape instead of a linear shape, and also the cross sectional shape of the groove can be a inverted trapezoidal shape or U-shape. Also, non-permeable mortar can be applied to the bottom surface of the groove 3. These blocks 1 are laid on a sidewalk or the like tightly without gaps, rain water flowed to the groove 3 can be permeated to the inside of the main body 2 of the block from a side wall, and dirt or the like remained in the groove 3 can be removed separately. In this way, blinding or fouling by a downward pressure can be prevented and a good appearance can be kept for a long period of time.
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