| 摘要 |
A wall block for outer walls has a body restricted with side surfaces fit for formation of side surfaces of bearing layer of wall, and end surfaces fit for formation of joints with adjacent wall blocks of the wall. At that the body of the block is formed with first element made of porous concrete and other element made of material that has smaller permeability for vapor and air and smaller water absorption compared to material of the first element, so one side surface of the body is surface of the other element. Not less than 20 % of total area of each end surface of the body is formed by surfaces of the other element, its cross sections with two normal to each other imaginary planes are mostly of-like form. At that the other element is made of structural or structural-heat insulation building material. |
