Find the construction steps for waterproof coatings
3, note
(1) rain weather and five wind above the weather shall not be construction.
(2) coating waterproof layer shall not have bottom leakage, cracking, holes and other defects and peeling, bubbling, carcassing and wrinkle phenomenon. Coating waterproof layer and the base should be bonded between the solid, no hollowing, trachoma, delamination and so on.
(3) the coating site should be continuous, solid, shall not appear Alice, hollowing parts.
(4) rigid protective layer before the completion of any personnel shall not enter the construction site, so as not to damage the waterproof layer; coating of the overlapping parts should be care by the staff.
(5) roof should be used lime soil, clay or sub-clay for backfill, thickness 50 cm, backfill shall not contain stones, gravel, ash and organic matter. Artificial compaction of each layer 25 cm, mechanical compaction of each layer 30 cm, rammed to prevent damage to the waterproof layer. In the backfill thickness of more than 50 cm, it is allowed to use mechanical backfill rolling.
2, waterproof layer construction sequence and methods
(1) base surface treatment and acceptance of qualified, and now Yin, Yang angle and construction joints and other special parts brushing waterproof coating layer, strengthen the layer 1 mm, strengthen the layer after brushing, immediately paste fiberglass cloth or 30 ~ 40g / ㎡ polyester cloth reinforcement layer, is strictly prohibited to strengthen the surface layer and then paste the reinforcement layer material.
(2) to strengthen the layer of hard work, began to brush a large waterproof layer, waterproof layer using multi-channel (3 to 5) brushing, brushing the upper and lower coating should be perpendicular to each other. When the surface of the coating is completely cured (not sticky hands) before the next curtain coating construction.
(3) polyurethane coating waterproofing layer after the completion of the experience of acceptance, the timely application of the waterproof layer of the protective layer, the plane protective layer with 7 cm thick fine stone ㎝, in the pouring of fine stone before the need to cover the waterproof layer A layer of 350 # paper tire linoleum insulation layer. Facade waterproof layer (such as anti-beam facade) with a thick 6 mm polyethylene foam protection (expansion ratio of not more than 25 times).
1, base surface treatment
(1) roof structure After the completion of concrete pouring, should be repeated water compaction, so that the surface of the grass-roots level, the flatness with 2m to check the ruler, ruler and grass-roots gap of not more than 5 mm, and only allow gentle changes.
(2) the base surface of the pores, rugged, honeycomb, gap, sand, etc., should be promptly treated, the base surface must be clean, no floating slurry, no water beads, no water; when the base surface appears more than 0.3 mm cracks , Should rush each 10 cm brushing 1 mm thick polyurethane coating waterproof layer, and then set the polyurethane cloth reinforcement layer, and finally brushing waterproof layer.
(3) all the corners are used 5 × 5㎝ 1: 2.5 cement mortar for chamfering, the angle made R = 10 mm rounded corners.
