| 摘要 |
<p>A block (2), prefabricated in one piece from a composite material, has at least two opposite faces (3, 4) covered with layers of an impact-resistant material (5), such as galvanised steel, aluminium or plastic. The layers are turned inwards and downwards under the base of the block to form extensions (9) that can be fitted into a hollow foundation rail (13) filled with concrete. A block (2), prefabricated in one piece from a composite material, has at least two opposite faces (3, 4) covered with layers of an impact-resistant material (5), such as galvanised steel, aluminium or plastic. The layers are turned inwards and downwards under the base of the block to form extensions (9) that can be fitted into a hollow foundation rail (13) filled with concrete. The extensions are preferably 150 mm deep and have evenly spaced or random holes (10) of about 50 - 500 sq mm to engage with the concrete before it sets. The top surface (6) of the block can have a finishing layer of foam, fibres, plaster, wood or mortar.</p> |
