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How to build a good underground waterproofing synthetic polymer membrane?

How to build a good underground waterproofing synthetic polymer membrane?
(1) the selection of synthetic polymer waterproofing membrane of the specifications, quality, physical performance must comply with the relevant provisions.
(2) according to the selection of synthetic polymer waterproofing membrane, preparation of primary treatment agent, adhesives, sealing materials and other auxiliary materials.
(3) preparation of materials and equipment.
(4) check the construction work conditions.
① Check the floor leveling layer
Underground works of concrete mat layer of cement mortar leveling layer, require smoothing calendering. Leveling layer and protruding objects connected to the Yin Jiao, should be wiped into a uniform arc. Surface should not be shelling, cracks, sand, ash and other defects. Where defects are to be repaired, flatness to achieve the standard.
The strength of the leveling layer is greater than 5 MPa.
Leveling layer should be basically dry, the moisture content of not more than 9%.
② Check the quality of the waterproof material, according to the provisions of the sample re-tested before use.
③ Check whether the operating equipment is complete.
(5) primary treatment
① the eradication of protrusions, mortar and other foreign body pimple.
② clear dust debris, a thorough cleaning clean.
③ coating primary treatment agent: the general is the polyurethane coating waterproof material of a material: B material: xylene by 1: 1.5: 3 ratio with mixing. With a long handle roller brush dipped in the treatment agent evenly coated on the surface of the base, dry 4h or more, in order to carry out the construction of the next process.
Can also be based on membrane supporting the production of grass-roots processing agent coating on the surface of the grass-roots level.
(6) enhanced treatment of complex parts
Underground engineering, such as the corners of the wall and the roots of the wall is prone to leakage of weak parts, should first use a polyurethane material: B material according to the ratio of 1: 1.8 ~ 2 with the mixing evenly brushing in the complex parts of the roots , Brushing the density of not less than 200mm from the center of the above, the thickness of not more than 1.5mm. Coating curing 24h above, in order to pave the coil.
Can also be selected according to the membrane supporting the production plant adhesive brushing.
(7) paving the coil
Synthetic polymer waterproofing membrane paving are generally cold sticky method (cold construction): the use of special adhesive waterproofing membrane paste.
① Paving paste adhesive membrane: first put the adhesive container to open, stir evenly with an electric mixer, the base surface in the clean good synthetic polymer membrane of the paste line, the paste volume The material parallel to the tile in the grassroots level, with a long handle roller brush dipped in a uniform mix of adhesive evenly coated on the opposite side of the membrane, but leave the seam at 100mm wide at the non-adhesive. The same method, the coating on the surface of the substrate. General lay aside after 20min, with your fingers touch glue, sticky hand can be paving.
② paving the membrane material: underground waterproofing layer should be full of sticky, will have been coated with the membrane roll over the alignment of the good baseline flattened. Or roll the adhesive-coated coil into a cylindrical shape, and then insert an iron tube of φ30 mm × 1500 mm in the center of the cylinder, and then the two sheets of paper are respectively carried by the two persons so that one end of the coil is fixed at the predetermined reference line , And then spread along the reference line coil. Regardless of the spreading method used, stretching of the web is not permitted and wrinkles are not allowed. When a roll of rolled material, should immediately with a clean soft long handle roller from the end of the roll began rolling in the direction of the transverse direction to completely rule out the coil and the adhesive layer of air, to bond firmly, And then roll in the top roll too solid bond.
③ Coil seam: roll and membrane lap width of 100mm, lap method, the extension of the joint direction, every 1m or so, from the edge of the membrane 100mm brushing a little adhesive at about 15min After the basic drying, will be required to open the temporary lap of the coil fixed. With the membrane joint adhesive with a paint brush evenly brushing open the opposite side of the membrane, the bottom of the membrane of the front, the glue 20min or so, with your fingers touch the adhesive non-stick hand, then hand side of the pressure , While the air from the inside out. Adhesive flat service, with the use of hand-held pressure roller, followed by a serious rolling again. In the overlapping edge of the membrane, and then sealed with sealing material.
(8) laying asphalt paper tires membrane protection isolation layer
After the laying of the waterproof layer of the membrane is completed, after careful inspection and acceptance, the surface of the waterproofing membrane layer on the base plane is coated with a layer of petroleum asphalt paper tire with a 404 glue point as the protective insulation layer.
(9) watering fine stone concrete protective layer
After the laying of the protective layer of the asphalt paper tread coil, the protective layer of the fine stone concrete with a thickness of not more than 50mm shall be poured into the plane part of the underground works. Watering fine stone concrete, should be laying board lane, are not allowed to push the material in the waterproof layer, can not damage the membrane waterproof layer, so as to avoid hidden dangers, resulting in leakage of water quality accident. Can not use the plug-in vibrator, the application of flat-plate vibrator or roller compacted and flattened, and then poured in the above structural layer of underground engineering.
(10) the outer wall of the waterproof layer and protective layer construction
When the concrete structure of underground engineering strength standards, the outer wall of the waterproof layer is the base layer of the wall (that is, the primary treatment) brushing the primary treatment agent, brushing the complex parts of the adhesive, enhanced treatment. The paving of the coil, the lapping and so on are the same as the floor plane operation requirements.
Exterior facade waterproof layer by inspection and acceptance, can be checked in the membrane waterproof layer on the outside. A 25 mm thick polyethylene foam sheet or a 40 mm thick polystyrene foam sheet is affixed. Adhesive use of neoprene adhesive paste, when the completion of the protective layer of the construction, the foundation pit can be layered backfill March 7 mortar compaction.

 
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