To prevent the occurrence of breakage, such as a crack and a corner chip, by regulating a shape and size, even in a block for pavement having a specified bending strength and compressive strength.
In a block 10 for pavement formed in a polygonal shape in a plane of an exposure surface and having a bending strength of 10-30kgf/cm2 or a compressive strength of 50-170kgf/cm2, the length of a longest center of figure straight line 10A passing a center of figure O of a plane figure is set to a value lower than a value increased 2.5 times as long as the length of a shortest center of figure straight line 10S, and the length of the longest center of figure straight line 10A is set to 5-30cm, thickness (t) to 5cm or more, and an internal angle θ to 45° or more.
KARASAWA AKIHIKO
KATAGIRI MAKOTO
SHINOHARA AKIYOSHI
Next Patent: WATER-PERMEABLE PAVEMENT MATERIAL AND MANUFACTURE THEREOF