| 摘要 |
PURPOSE: A guide block for blind persons is provided, in which two block bodies are formed in different sizes to have a plurality of pores and prevent delamination. CONSTITUTION: A guide block for blind persons comprises a permeable concrete block body, a groove, an infiltration layer, and a guide spread layer(20). The permeable concrete block body is formed of particles of different sizes and includes ribs which are exposed on all sides of the block body. The groove is formed on the top of the permeable concrete block body. The infiltration layer is formed by impregnating liquid plastic, wherein the infiltration layer is integrally formed in the inner walls of the groove. |
