To provide a permeable subbase course material capable of improving the stability of a quality and the simplicity of a manufacture, a manufacturing method for the material and a permeable pavement.

The permeable pavement 1 for a roadway has a filter layer 3, a lower-layer subbase course material 4 or an upper-layer subbase course material 5 composed of the permeable subbase course material containing a blast-furnace annealing slag 7b or a steel-making slag 7a having a particle size of 5 to 40 mm in 50 to 90 mass% and a granulated blast-furnace slag 8 having the particle size of 10 mm or less in 50 to 10 mass% and a base course 11 and a surface course 12 on a subgrade 2 in succession.

COPYRIGHT: (C)2005,JPO&NCIPI