Plastering silicon Pu on old cement concrete

For the paving of sports grounds, there are certain differences in the handling of different ground foundations. However, it is necessary to ensure that the flatness, dryness, and temperature of the foundation of the floor conform to the requirements of the sports flooring before the pavement. For the laying of a silicon Pu pitch on old cement concrete, the handling of points should meet the following requirements.

(1) Basic requirements:
Solid, flat, without sinking plate, broken cracks no more than 10mm wide, if you do not cut a reasonable temperature seam, you must cut the temperature seam according to the requirements of the new cement foundation. If the foundation has sinking or extreme unevenness, too many broken cracks, etc., it is recommended to lay the leveling foundation again with asphalt concrete (>40mm thick) or cement concrete (>50mm thick).

(2) Basic treatment:
Basically deal with the new cement concrete foundation treatment method. If the foundation has cracks more than 2mm wide, apply a cutting machine to widen the column 6~8mm to grind and caulk according to the requirements of the new cement foundation; if the width is less than 2mm, grind the surface of the joint into a “V” shape with a thickness of 50mm, Depth 3mm, direct filling with glue can be used to fill multiple channels.

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