| 摘要 |
PURPOSE: A water-retentive sidewalk-block is provided to prevent pedestrians from slipping and to prevent efflorescence by utilizing abandoned materials. CONSTITUTION: A method for manufacturing water-retentive sidewalk-blocks (100) comprises following steps. A first mixture with 100 weight% of ceramic pieces and 15 to 25 weight% of binders is put into a metal mold. A second mixture with 100 weight% of ceramic pieces and 20 to 35 weight% of wet powders is laminated on the first mixture to form a laminated material. The laminated material is pressed. The ceramic pieces are grinded into 1mm to 4 mm. The binders comprise 100 weight% of clay, 1 to 20 weight% of compounds, and 5 to 50 weight% of water. The compounds comprise one of the lignin sulfonic acid, lignosulfonate, naphthalene sulfonic acid, naphthalenesulfonate, naphthalenesulfonat condensate, melamine sulfonic acid, melamine sulfonic formalin condensate, and the polystyrene sulfonate. The wet powders is made by grinding a third mixture with 100 weight% of feldspar, 30 to 60 weight% of clay, and 10 to 30 weight% of china clay. 5 to 60 weight% of water is put into the grinded third mixture to make a fourth mixture. The fourth mixture is dried at 20 to 300°C. |
