| 摘要 |
The floor comprises a draining layer (2) of gravel with rough granular size positioned on the earth (1), and a concrete layer (3) located on top of the draining layer. Between the concrete layer and that for drainage is a synthetic fibre sheet (7). - This sheet prevents freshly cast, liquid solid constituents in the concrete, but not in the mixing water, from penetrating into the draining layer where they could affect the drainage characteristics. |
