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The surface of the floor is uniform and solid, free of oil, and no unstirred asphalt blocks. It is smooth and crack-free. It has no lumps, no pockmarks, smooth and smooth joints, and no water blocking phenomenon. The compaction density is not less than 95%. , After medium-sized roller press, no significant wheel marks, no soft peeling, no loose floating soil, wave, etc., flatness of 3mm ruler error is less than 3mm, flatness pass rate is greater than 90%, there is a certain drainage slope , ensure the release of water. The natural maintenance of the new asphalt base is not less than 28 days, so that the high-boiling volatiles in the asphalt can be completely volatilized to ensure that the silicon PU material has a good bond with the foundation.
(2) Basic processing:
Aã€Cleaning: Clean the base surface with washing powder water or detergent essence, then rinse with clean water. The foundation after cleaning should be free from dirt and other loose debris. Mark the mark of the water level when cleaning.
B. leveling: use professional bottom layer TB-202 according to group A: group B = 1: 2.5 (weight ratio) mixing ratio (add water to adjust the construction consistency), with two or more squeegee blade on the base surface, requirements The gaps on the base must be filled and sealed to ensure that there is no pinhole after the solidification and the surface is flat. Does not affect the back of the construction, if the base surface gap is large, the first batch of scraping can be added to the same amount of A group of fine sand (40 to 80 mesh), and stir evenly after coating.
C, water leveling repair: According to the new cement requirements.
Ground treatment method for laying silicon Pu on asphalt
(1) Basic requirements: