Concrete base
1.Concrete requirements
Compactness: The strength reaches the concrete building strength standard (C25 /4000PSI).
Flatness: Using a 3m ruler to measure, the error is not more than 3mm.
Slop: Horizontal slop is not more than 5°4», Vertical slop is not more than 3P», to ensure the drainage.
Maintenance: The new concrete should be maintained for no less than 28 days, in the front of 7days should pour water conservation.
Crack: the new concrete must be cut after pouring water conservation, each part size should be 6X8m. the crack width should be 6-8mm,the depth is not less than 30mm.
Note: It suggests building the new concrete ,in case of the old concrete sink deformation or crack too much. The thickness of the new asphalt thickness should be 40mm,and the new concrete thickness
should be 80mm.
