Self-adhesive waterproofing roll-roofing construction process and paving method
Self-adhesive waterproofing membrane paving method there are two main: stretching paving method and crushing paving method. In actual construction, the construction staff can determine their own paste method according to the site environment, temperature, sunlight and other conditions, but exhaust, compaction, anti-wrinkle and other basic requirements or the same.
When pasting coils, always pay attention to the alignment with the baseline, so as not to have difficult to correct the deviation. Coil paving, coil shall not be stretched. After pasting, use the pressure roller to roll the coil from the middle to both sides to discharge the air, so that the coil is firmly affixed to the base. Do not prematurely peel the coil back lap part of the isolation paper, so as not to contaminate the bonding layer or misapplied.
1. Laying method
Roll out the coil at the base line, lift the coil (together with the release paper) from one end, fold it in half along the middle line of the coil length, gently cut the edge of the release paper with a paper cutter, taking care not to scratch the coil, and carefully tear the release paper from the back of the coil for a short time, about 500mm long. Together, two people peel off the release paper and align the base line. Roll out the half-length coil into place first, pull the peeled insulation paper backwards with even force, and slowly pull out all the remaining half-length insulation paper. Pay attention to the integrity of the pulled insulation paper when paving, if there is a tear or fracture, paving should be stopped immediately. Tear off the insulation paper residue clean up, continue paving.
2. Roll paving method
Peel off the insulation paper and lay the coil at the same time. Construction, without opening the entire coil, a steel pipe will be inserted into the paper core tube in the center of the coil, and then one end of the steel pipe will be lifted to the beginning of the two-person paving position, forward to expose the coil about 500 mm. another person will peel off the isolation paper of this part of the coil, rolled to the used packaging paper core tube. Will have peeled off the isolation paper of the coil material has been aligned with the reference line gently laid, and then compacted. After the initial laying is completed, one person slowly lifts off the anti-paper, rolls into the above-mentioned paper core tube and moves forward. Two people hold the coil and roll the coil forward along the base line at the same time. Note that the two people carrying the coil should move at the same speed and be coordinated. When rolling, not too slack; after laying the coil, first use the long-handled roller brush to remove the air under the coil, and then use the large pressure roller or handheld portable vibrator to compact the coil and paste it firmly.
3. Pavement elevation and large slope.
Because of the relatively low adhesion between self-adhesive coil and the grass-roots level, the coil is easy to slip off on the elevation or large slope. Therefore, in the elevation or large slope on the paste coil, it is advisable to paste, exhaust or rolling before, with handheld gasoline torch on the bottom of the coil adhesive for proper heating.
After the large area of coil exhausted and compacted, with small handheld pressure roller rolling lap, from the inner edge of the lap outward rolling pressure, exhaust the air, paste firmly.
4. Seam bonding and sealing
Overlap bonding: self-adhesive membrane overlap edge in the factory has been left, bonding only need to peel off the isolation paper can be. Overlap width is generally 6 ~ 7 cm.
Coil lap sealing: coil short edge, coil end, pipe wrapping, shaped parts of the lap part, should be sealed with self-adhesive rubber asphalt waterproofing membrane special sealing paste. The width of the lap seal shall not be less than 10 cm.
5. Fix and close the head.
Weekend around the end of the coil into the slot (20 mm deep × 40 mm ~ 60 mm high trapezoidal slot). Metal wooden strips are nailed firmly and sealed with special sealing paste.
Adjacent two rows of coil short side seams should be staggered more than 300mm to avoid multi-layer seam overlap and coil paste uneven. When the waterproofing area is very large, and must be phased construction, the middle process has a lot of temporary closure, should use a special sealing paste for temporary closure.
After the coil is pasted, measures should be taken to temporarily cover to reduce the chance of direct exposure and damage to the coil. The peeled silicone barrier paper is laid on the coil, and the protective paper can also be used as a barrier between the waterproof layer and the protective layer.
After application and exposure to sunlight, slight surface wrinkles and bubbles may appear. This is normal and will not affect its waterproofing performance, and will disappear once concealed.
The waterproofing layer should be concealed as soon as possible and should not be exposed to the sun for a long time. Concealment should usually be done within 24 hours after the waterproofing layer is completed. If there is a closed water test, the concealment time should be counted from the end of the closed water test.
Preparation → grass-roots treatment → brush matching grass-roots treatment agent → detail node additional layer construction → datum line construction → reaction sticky waterproofing coil laying → exhaust compaction → lap edge compaction sealing → façade coil fixed sealer → inspection and acceptance → protective layer construction.
PVC is the abbreviation of polyvinyl chloride waterproofing roll-roofing material, is a new type of polymer waterproofing roll-roofing material made of polyvinyl chloride resin and additives such as anti-oxidants and anti-UV. Ltd. production of PVC waterproofing membrane with high tensile strength, high elongation, shrinkage rate is small, low temperature flexibility, long service life, the product performance is stable, convenient construction.
PVC waterproofing membrane is an excellent green waterproofing materials, with abundant raw materials, renewable use, harmless to human body and the environment and other advantages. Therefore, in the country's "fourteenth five-year plan" proposed "double carbon" goal, the country vigorously advocate emission reduction, PVC waterproofing roll-roofing has been the key promotion products in the field of polymer roll-roofing, in the building waterproofing industry occupies an important position.
1) high elasticity: the film elongation at break can reach more than 1000%, suitable for expansion joints and deformation joints, can effectively solve a variety of structures due to stress deformation, expansion cracking, puncture or poor connection and leakage, corrosion and other problems; effective treatment of structural deformation, to ensure that the waterproof effect.
Spray quick-setting rubber asphalt waterproofing coating consists of rubber asphalt emulsion A component and emulsion-breaking agent B component. A component consists of high solids emulsified asphalt and polymer. It will be co-blended modified to form a water-soluble mixture of polymer and emulsified asphalt. component A and component B is sprayed from the two nozzles of the special spraying equipment on site, atomized mix quickly after breaking the emulsion dehydration (within 10 s), coagulation into a film. After efforts, a dense, continuous and complete rubber asphalt coating is formed with high elongation, strong elasticity, excellent durability and waterproof, anti-corrosion, impermeability and protection. A spraying can reach more than 2 mm thickness, fast construction speed, environmental protection.
Silicone waterproofing agent construction is generally divided into grass-roots surface cleaning, crack repair, spraying construction three procedures.