| 摘要 |
An urethane upper layer sand waterproofing method is provided to prevent economic loss caused by reconstruction of the upper coating layer because waterproof function of urethane is semi-permanently used. An urethane upper layer sand waterproofing method is as follows. While giving coat of the common way with roller, phase releases the sand of the diameter 0.25mm~2.5mm over the upper part to be thick. Sand sprinkles to the thickness within 2mm~10mm. It is cleaned within 48~72 hours with broomstick after sprinkling sand. The sand which is not integrated in the upper coating layer is removed. |
