一、豆石混凝土地面的起砂做好的地面,用脚一撮出现浮砂,或用小锤、钉子往面层上一划,出现小沟等明显痕迹,即是地面起砂。为防止地面起砂,可用1:2灰面压光,并在压光出活时,边压边带素水泥面压光。抹地面前应备好粗砂,含泥量不超过2%,水泥以325号普通袋装水泥为宜,冬施时最好选用425号普通袋装水泥。 First, the ground of the sand and gravel concrete floor is well-grounded. A floating sand appears at the foot, or a small hammer or nail is used to make a plan on the surface layer. In order to prevent sanding on the ground, a 1:2 ash surface can be used for calendering, and when calendering is performed, the strips can be calendered while pressing with light. Grinding sand should be prepared before the ground, clay content of not more than 2%, cement with ordinary bagged cement No. 325 is appropriate, the best choice for the winter application of No. 425 ordinary bagged cement.