1.Construction technology process
Clean-up and repair basic level→node additional enhancement layer processing→positioning and trial paving→laying self-adhesive membrane→ rolling,exhaust and compaction→adhesive seam→sealing of joints, ends and joints→inspection and acceptance .
2.Operating Points and Technical Requirements
2.1 Basic layer cleaning: use shovels, brooms and other tools to remove construction waste on the basic layer , if there is water, it needs to be cleaned up.
2.2 Strengthen the joints: Strengthen inner corner , external corner, late poured bands and deformation joint of the basement floor.
2.3 Laying membrane: First lay the first membrane according to the baseline, then lay the second, then uncover the isolation film of the overlapping parts of the two membranes, and overlap the membrane.
When laying the membrane, the membrane should not be stretched hard, and should be aligned with the reference line at any time, so as to avoid the deviation that is difficult to correct.
2.4 Membrane connection: After laying the membranes, then pasting them. Pressing cots roll hard to remove the air to make sure that the overlap edge of the membranes are firmly bonded. Using self-adhesive lapping method, make sure that the lapping width of the long and short sides of the membrane is not less than 80 mm.
2.5 Remove the isolation film on the upper surface of self-adhesive waterproof membrane and sprinkle cement powder on the membrane as isolation measure (to prevent the membrane from sticking to the foot).
2.6 When concrete is poured on the self-adhesive membranes, the reaction self-adhesive effect between membrane and concrete is formed. The bond strength increases with the increase of the compressive strength of concrete. When concrete reaches the initial setting stage, the bond layer of membrane has completely cured with the concrete surface and dissolved into a new waterproof layer.
2.7 Defect repair
The self-adhesive side of self-adhesive membrane will lose its self-bonding property partly after being polluted by dust,which is manifested by overlapping seals, local warping at the closing part, opening and so on. Once the above-mentioned situation occurs in the project, it must be repaired in time. The repairing method is to use hot-air welding gun, extending hot-air welding nozzle into the warped edge and open interior, use hot-air to heat and melt the self-adhesive rubber asphalt, and then bond it.
2.8 Inspection and acceptance of cold self-adhesive membranes:
Inspecting while paving membrane . Use screwdriver to inspect the overlap part . If you found a weak place , repairing in time. Do not leave any hidden dangers. Consturction workers and quality inspectors must follow the inspection. After inspection and passing the acceptance test , then will be allowed entering next process of construction.
3 Self-adhesive Membrane Overlapping
In plane construction, the lap width of membrane is 80 mm. Remove the isolation film at the overlap edge of the membrane, and then use small rollers to press and adhere. The short edge joints of adjacent two rows of membranes should be staggered by 500 feet to avoid making the membranes uneven .
4.Lap joint of self-adhesive membrane
Between self-adhesive membrane and membrane, the lap seam of self-adhesive membrane must be fully bonded and tightly bonded. The lap seam must be fully bonded and handheld press wheels should be used when necessary.
Bonding of overlap part : bonding of lap seam of self-bonding membrane, using special pressing roller to press evenly on the top of the upper membrane, taking the edge as a compact bonding criterion.Press wheel twice when necessary.
(sourcing:network)
