Precast wall panel structure waterproof construction technology

1 scope

This technology is applicable to prefabricated cavity structure construction technology of waterproof wall panel.

2 construction preparation

2.1 materials and equipment:

2.1.1 General spontaneous styrofoam (polystyrene Board for short), thick 15~20mm.

2.1.2 PVC soft plastic sheet, the thickness of 1.5~2mm.

2.1.3-PVC soft plastic pipe, 20mm.

2.1.4 building asphalt, or 30th, 30th, five oils or use an ordinary pitch, or 65th, 75th.

2.1.5 cooling oil, or 3%-methyl-sodium (silicone).

2.1.6 polyethylene acid formaldehyde (107 glue).

2.1.7 No. 350, asphalt paper linoleum.

2.1.8 PVAc (emulsion).

2.1.9 cement: No. 325 of ordinary Portland cement and slag Portland cement.

2.1.10 sand: clay is less than 3%.

2.1.11 waterproof grease. (Clay): building gel, PVC cement, two-component polyurethane sealing cement, chlorosulfonated polyethylene sealant, etc. According to the design requirements.

2.1.12 waterproof coating: Chloroprene LaTeX asphalt coating, PVC coating, polyurethane coating, according to the design.

2.1.13 fish oil or light oil.

Note: the above material must comply with the design requirements for quality and performance.

2.1.14 main tools: hand saws, cutters, scissors, rulers, scrapers, wire cutters, caught in the electric stove, boiling tar buckets, water tube, rubber tube.

2.2 operating conditions:

2.2.1 cutting insulation: polystyrene with a resistance wire cutters cut into strips, wide depending on the design drawings of the exterior wall construction, width, and length longer than the cavity waterproof wall panel slots 50mm. Polystyrene Board long enough, kraft paper, coated polystyrene LaTeX long available.

2.2.2 cutting linoleum: linoleum cut with a saw, long width the same as polystyrene.

2.2.3 asphalt felt waterproof thermal insulation: the asphalt with a furnace or water boil (boiling temperature should not be too high in order not burn polystyrene), linoleum and polystyrene with hot asphalt cement pressure.

2.2.4 cut plastic: PVC panels cut into strips. Length and width must be adapted to and crack width, its width set width and 25mm, height of high layer 100~150mm, for closing the cavity and catchy, cut a circular-arc notch at the lower end, to arrange for water holes.

2.2.5 plastic pipes: polyethylene plastic pipe cut into 60mm pieces, one end cut point reserve, as shown in Figure 4-43.

Figure 4-43

2.2.6 checking sizes and shapes of waterproof wall panel construction is complete, if there is damage, congestion, voids and defects, should be carefully repaired.

2.2.7 vertical slot and cavity wall panel brushed waterproof coating. With cold methyl-sodium silicate solution in oil or 3% the end of paint coats.

2.2.8 when above the first floor for the reinforced concrete in the basement when the prefabricated wall panels, first floor drawings should be now-long monolithic concrete water outside weathering. Should be reserved in the Foundation or basement beams reinforcing, with vertical bars, water the beans after the formwork concrete, concrete strength up to 5MPa, installed the first layer of wall panels, as shown in Figure 4-44.

Figure 4-44

3 operational processes

3.1 process:

Vertical seam sewing waterproof waterproof → do → do cross-seam waterproof waterproof → → other parts tricking water test

3.2 State joint waterproofing:

3.2.1 insert asphalt felt waterproof insulation: once when the siding is installed in place, steel welding keyway immediately, exterior-wall nodes (column) before the reinforcement, asphalt felt waterproof thermal insulation block inserted in the end, around tight, no bulge cracking or segmented plug. Width of a asphalt felt waterproof insulation should be appropriate to prevent when poured wall concrete. Plug the cavities. Vertical wall panel as shown in Figure 4-45.

Figure 4-45

(A) longitudinal walls; (b) gable

3.2.2 inserting plastic: according to the actual width used for inserting the proper size waterproof to prevent too broad, too narrow, tank stripping, crimping slippage, if such phenomena should be replaced immediately. Water transfer to waterproof upper with document closely and lower into the water on the slopes to an enclosed cavity waterproofing to prevent debris falling into the cavity. Construction waterproofing must be synchronized with layers from the top down when inserted into the cavity, no plug from behind the outer wall face. Before inserting waterproof, to check the State after seam cavity of asphalt felt waterproof insulation for damage should be repaired; will be spilled mortar pouring columns clean stones and other debris, such as vertical seam is too narrow when unable to clean, this gap can no longer do construction waterproofing, should be treated with waterproof grease embedded solid fill into the waterproof material. Plastic article itself is flexible, easy to bend inserting and as bottom of the jointing mortar, so when the mortar joint, force should not be too large, to prevent the water off trough caused the cavity plug.

3.3 do sewing waterproof:

3.3.1 sewing effect depends mainly on siding installation. Therefore, wall panels in place to reach the upper and lower vertical flat pad height is appropriate. Is water, water protection, ensure flat cavity full, straight and smooth. Cavity into linoleum volume, cement mortar on the outside. Linoleum rolls as bottom of the jointing mortar, when the joint force should be uniform, and should not be too large, to prevent the linoleum go into plug cavity. Sewing waterproofing as shown in Figure 4-46.

3.3.2 when pishui with water to touch or with leakage when the plug cannot be picked off, all such joints should be filled with waterproof ointment or plaster, cement mortar outside. When sewing too wide or water damage, was wrong in the water to large, first in the joints "6" or "8"-shaped linoleum rolls, outside the cement mortar. As shown in Figure 4-47.

3.4 cross-seam waterproof: Gou Li joints, horizontal joints before the mortar insert the semi-circular plastic drainage pipe cross stitch, to stick wall 15mm, and tilted down. Construction should be checked before the upper end of the vertical seam of plastics come into contact with water tight, height and volume is appropriate, as there are gaps must be sealed with grease. Should be at the top of the lower plastic plug on the back side of the retaining wall, sealing upper, upper plastic bottom insert to lower on the weathering of exterior wall panels. Cross joints waterproofing as in Figure 4-48.

3.5 other waterproof material:

3.5.1 balcony (including anti-slot balcony, and flat balcony) waterproof: balcony of Shang, and Xia side state sewing must with ointment embedded sewing, outside hook mortar protection, Xia sewing embedded ointment of length ends the many Yu 30cm, Shang sewing as met blind sewing Shi, to out 20mmx20mm gap, cleanup clean, brushing cold Foundation oil Hou, again embedded ointment, side state sewing and upper wall Board empty cavity State sewing handover at should pass long embedded ointment, do drainage slope, left drain. Seam between two adjacent balcony plates are pointing up and down, separated by gel workmanship in compact. Balcony waterproofing is shown in Figure 4-49.

Figure 4-46

3.5.2 waterproof rain cover, awning waterproofing references balcony.

3.5.3 wall waterproofing: used when constructing a waterproof, and sewing and the sewing practices the same wall panel, vertical joints should be embedded in a waterproof grease on the inside. When waterproof material is used, you must enable sewing, outside seam, sew, Neili seam seal, vertical seam embedded grease and tar the roof lap. Bean stone parapet at the top do concrete top and flashing (flashing).

3.5.4 wall tube hole must grease workmanship according to design requirements. In the flat, vertical joints in case of through-wall pipe hole, must the entire block filled grease. At the time of construction, hang shelves on the wall outside the cave, waterproof mortar should be used plug, located 2cm impaction waterproof mortar, mortar screed outside.

3.6 after the exterior caulking, paint two waterproof coating, thickness should be not less than 1.5mm to prevent water seepage because of shrinkage crack of mortar.

3.7 grease joint construction should pay attention to the following points:

3.7.1 joint parts of the base surface must be smooth, solid and dry and clean up the joint contact surfaces of dust, debris, then brush the cold oil, ointment: petrol =3:7 prepared with cold oil, dried caulking processing.

3.7.2 when filleting ready-made rub ointment into strips into joints within the diameter of 20mm, then the valve compact, or within the crowded block in the gap with caulking gun; as low temperature grease hard, softened ointments can be properly heated (baking temperature: 60 ℃ below), fill in the seam with a scraper in the compaction.

Paragraph 3.7.3 joint grease must be considered compact, which bond without breaking. Phenomena such as peeling, open, pendulous; ointment after the block, surface brushing cold oil, grease seam painted on both sides, then the valve flat and compact. To prevent sticking, when in the hands, wipe a small amount of fish oil on the valve or light oil, no oil to avoid bonding fragile joints caused seepage.

3.8 tricking water test: tricking water test is a waterproof wall panel the last operation, cavity proof after all, did not engage in external decoration must be carefully tricking water test, testing the waters and make records.

4 quality criteria

4.1 project:

4.1.1 for waterproof quality and technical properties of various materials, you must meet the requirements of specification for design and construction; must have manual and quality certification. And a "certificate", prior to the second interview.

4.1.2 wall plates, wall plate waterproof structure must be complete, type, size and shape must comply with the design requirements and the relevant provisions, members should also have the factory certificate.

4.1.3 walls, balconies, rain cover, wall boards after installation, its elevation, Board width, pulp thickness should comply with the design requirements and provisions of the code.

4.1.4 ointment caulking must be tight, bond, no cracks, seams on both sides of cover width exceeds the not less than 20mm.

4.1.5 waterproofing coating must be flat and evenly, without falling off, peeling, cracking, blistering and other defects.

4.2 Basic project:

4.2.1, balcony plates, wall plate cover plate, wall Board Joint waterproofing construction completed, vertical sewing, sewing, cross stitch tricking water test to check.

4.2.2 issues tricking water test, to identify the cause of leakage and repaired in a timely manner, and continued to do after tricking water test until no more when a leakage occurs, may be carried out outside finish construction.

Location and repair the leakage point 4.2.3 should be carefully recorded, indicating the location, as the technical information included in the technical file for future reference.

4.2.4 joint grease surface density, cold oil should be uniform, protective layer of caulking bond, cover tightly.

5 finished product protection

5.1 when padded waterproof caulk and paint coatings, no pollution, such as walls, Windows and doors.

5.2 when repairing leaks, should pay attention to protection of walls, balconies, rain cover place the decorative surface layer.

6 quality problems to be noticed

6.1 outside wall Board installation deviation big: Board end of pad gray too much, will makes was water super high, caused flat cavity exposure; Board end of pad gray too less, caused Xia sewing Yu touch, no empty cavity drainage: Board end of pad gray uneven, produced flat cavity end water drainage not Chang, and will caused State sewing Shang BU width ranging, insulation article, and waterproof article construction difficult; lifting outside wall Board Shi, upper and lower two block is not a level surface Shang, pishui and the block water Taiwan dry touch, caused capillary sucking water into indoor; Board itself geometry size not specifications, has errors, also will produced above phenomenon. Therefore, the installation quality of waterproofing and exterior wall cavity are closely related.

6.2 water leakage:

6.2.1 plastic tube off, curled, skew, too soft, back seam to form vertical seam cavity, resulting in leakage of water.

6.2.2 top and water without the plastic seal, not on the plate at the lower end of the drainage slopes made sewing, sewing the leakage of ash and other debris does not clean wall plate defects did not fix or repair improperly, resulting in leakage.

6.2.3 standing seam, flat seam jointing force too much would set a joint plastic deformation or extrusion with waterproof and thermal insulation paste, so retaining wall drainage; or cavity fill linoleum rolls squeezing leaned back against the label of water plugging cavities, resulting in leakage.

6.2.4 balcony, rain cover, parts of the wall materials such as waterproof, does not meet the requirements of construction quality, resulting in water leakage.

7 quality records

This standard should share the following records:

7.1 component factory certificate.

7.2 waterproof material factory certificate, instruction manual, sample inspection report, the permit card and without security.

7.3 wall panels tricking water test records.

7.4 covert inspection records.

Because of the war, many people become homeless. I can't do it well. Please help me.my PayPal is xhhnet@163.com.