Waterproof construction is a crucial part of home improvement. If it is not done well, it will not only affect the neighborhood but it will also be very troublesome. Select waterproof material, standard construction is the key. Today Xiao Bian has compiled a very practical and professional waterproof construction specification for everyone. Let's take a look at it, and let our homes do nothing.
Professional waterproof construction specification
First, the material requirements
1. Polyurethane coating waterproof material (two-component), should be factory certificate, should be used after retest.
The component A is a polyurethane prepolymer containing isocyanate groups prepared by polymerization and reaction of polyether resin and diisocyanate. The appearance is light yellow, sticky and barrel-loaded, 20kg per barrel.
Part B is made of curing agents, accelerators, toughening agents, mildewproofing agents, fillers, and thinners. It has red, black, white, yellow and brown colors, pastes, and barrels. 40kg per barrel.
Second, the main equipment
Should generally be equipped with electric mixer (power 0.3-0.5KW, 200-500r/min), stirring barrel (volume 10L), paint bucket (3L), plastic or rubber scraper, rolling brush, paint brush, spring scale, dry powder fire extinguisher Wait.
Third, the operating conditions
1. Brush the surface of the base layer of the waterproof layer, must clean the dust, debris, etc., and the residual hard mortar and protruding parts of the mortar should be leveled, cleaned, plastered, pressed, and the yin and yang angles should be rounded or rounded. Obtuse angle.
2. The surface of the base layer that is painted and waterproofed should be kept dry, and it should be flat and firm. There must be no defects such as emptying, cracking, and sanding.
3. In the leveling layer ground leakage, pipe roots, outlets, sanitary ware roots (edges), to close the head. The slope meets the design requirements and the components must be firmly attached and tightly sealed. After acceptance.
4. Highlight the roots, floor drains, drain outlets, yin and yang angles and other details on the ground. Add additional layers to deal with them. After the polyurethane primer is brushed, check and complete the hidden project acceptance.
5. The various materials used in the waterproof layer, primary treatment agent, xylene, etc. are all flammable materials, and should be stored and kept away from fire sources. During construction operations, fireworks should be strictly prohibited.
6. The construction of waterproof layer shall not be carried out in rainy or windy days, and the ambient temperature during winter construction shall not be less than 5°C.
Fourth, the operating process
1. Process flow: cleaning the surface of base layer → detailing → preparation of primer → brushing primer (corresponding to cold base oil) → detailing the application of intermediate layer → first pass of coating → second pass of coating → third pass of coating Waterproof layer construction → Waterproof layer test water once → Protective layer finish layer → Waterproof layer secondary test water → Waterproof layer acceptance.
2. Before the construction of the waterproof layer, dust and other debris on the surface of the base should be removed and wiped with a clean damp cloth.
3. The surface of the base layer painted with a waterproof layer must not be uneven, loose, hollow, sanding, cracking, etc. The moisture content is generally not more than 9%.
4. Apply primer (equivalent to cold base oil):
1) Prepare the primer, first add the polyurethane material and the material to the xylene, and the ratio is 1:1.5:2 (by weight), mix well, and the amount of preparation should be determined according to the specific situation, and should not be too much.
2) Brush the primer and prepare the primer mix prepared according to the above method. Brush evenly on the surface of the base layer with a long roller brush. The brushing amount is 0.15-0.2kg/m2. After the coating is applied for 4 hours at room temperature, feel. When not sticky, you can do the next process.
5. Coating waterproof layer construction: Polyurethane waterproof material for polyurethane materials, polyurethane materials and xylene, the ratio of 1:1.5:0.2 (weight ratio).
1) In the construction of film waterproof material, the mixing ratio must be accurately measured, and must use electric mixer for strong mixing.
2) Construction of additional layers: floor drains, pipe roots, water outlets, sanitary ware and other roots (edges), yin and yang corners, and so on. The pressure of each side of the junction seam 200mm. Brushing the water-imitation material, the specific requirement is that, after drying at room temperature for 4h, the second coat of waterproof material should be applied. After 24 hours of drying, a large-area coating waterproof layer can be applied.
3) Coating waterproof layer: The first coating waterproof layer: The waterproof material that has already been coated with polyurethane coating, evenly coated with a plastic or squeegee on the surface of the base layer that has been coated with a primer, the dosage per square meter is 0.8kg, there must be no defects such as leaking brush and bubbling. After 24h curing, the second coating can be performed. Second coating: On the cured coating, the coating is evenly applied to the surface of the coating in the direction perpendicular to the first coating. The amount of scraping is the same as that of the first pass. There must be no leakage brushing and bubbling. defect. After curing for 24 hours, the third coating film shall be smeared according to the above formula and method, and the amount of scraping is preferably 0.4-0.5 kg/m2. The three coats have a thickness of 1.5mm. The first test of the water, in case of leakage, should be repaired until no leakage.
In addition to the above-described painting method, it is also possible to use a long brush roller to layer the brushes in four directions in a direction perpendicular to each other. Spraying can also be used if conditions permit, but thickness and uniformity must be mastered. The parts that are not easy to be sprayed on details should be filled with brush after being dried.
4) Prior to the construction of the waterproof layer of the coating film, relevant personnel should be organized to make a serious presentation of the technology and the use of materials. After the completion of the construction of the waterproof layer, after a storage test of more than 24 hours, no leakage of seepage water was found to be qualified, and then the inspection and inspection of the concealed works was carried out and the construction of the next track was completed.
6. In the construction process encountered problems should be handled as follows:
1) When it is found that the viscosity of the paint is too large to be easily painted, a small amount of xylene can be added and the amount added should not be greater than 10% of the material.
2) When it is found that the paint cures too fast and affects the construction, a small amount of retarder such as phosphoric acid or benzenesulfonyl chloride may be added. The amount of the retarder should not be greater than 0.5% of the material.
3) When the coating is found to be too slow to affect the construction, a small amount of dibutyl tin dilaurate may be added as a pro-coagulant. The amount of addition should not be greater than 0.3% of the material.
4) After the coating is cured for 24 hours, the waterproof layer is still sticky. If it is difficult to apply the second coating, a layer of talcum powder may be applied. When the person performs the operation, the feet may not stick and the coating will not be affected. Film quality. If it is found that the material is precipitated, it should be mixed with A material before mixing, otherwise it will affect the quality of the coating film.
V. Quality standards
Guarantee project
1) The technical performance of the coating waterproof material and non-woven fabric must meet the design requirements and relevant standards. The product should be accompanied by factory certificate, waterproof material quality certification, on-site sampling test, unqualified or retest unqualified waterproof Material must not be used.
2) Polyurethane coating waterproof layer and its details must comply with the design requirements and construction specifications, and must not have leakage water phenomenon.
2. Basic items:
1) The base layer of the waterproof layer of polyurethane coating film should be firm, clean and flat, with rounded or obtuse angles at the yin and sun corners.
2) Polyurethane primer, polyurethane coating additional layer, the brushing method, lap joint, head should meet the requirements, and should be firmly bonded, tight, joint sealing, no damage, empty drums and other defects.
3) The waterproof layer of polyurethane coating should be painted evenly, and the protective layer and waterproof layer should be firmly bonded. There must be no defects such as damage and uneven thickness.
Sixth, finished product protection
1. The waterproof layer of the polyurethane coating film that has already been painted should be protected in time. Before the protection layer can be used, the shoes must not be worn out of the room to avoid damaging the waterproof layer.
2. The surrounding waterproof layer on the ground pipe, floor drain, drain outlet, sanitary ware, etc. shall not be damaged and parts may not be displaced.
3. Floor drains, drain outlets, etc. should be kept open, and debris should be prevented from entering during construction. Carefully clean up after testing.
4. During the construction of the waterproof layer of the polyurethane coating film, people must not walk before uncured so as not to damage the waterproof layer and cause hidden troubles of leakage.
5. In the construction process of the polyurethane coating waterproof layer, care should be taken to protect the door, wall, etc. to prevent contamination of the finished product.
Seventh, should pay attention to the quality problem
1. Hollowing: The hollow layer of the waterproof layer generally occurs between the leveling layer and the waterproof layer of the coating film, and the seam is caused by the excessive water content of the base layer, which makes the coating film empty and forms bubbles. The moisture content should be controlled during construction and carefully handled.
2. Leakage: Leakage of water in the waterproof layer occurs in the pipe roots, floor drains, sanitary ware, and yin and yang corners that pass through the floor. The reason is that the roots, floor drains and other components are loose, the bonding is not strong, and the brushing is not tight. Or the waterproof layer is partially damaged, and the length of the lap joint of the component joint seal is not enough. Before the construction of waterproof layer of coating film, it should be carefully checked and repaired.
The above is a brief introduction to the professional waterproof construction specification. I hope to help you. For more information, please visit this website. Stay tuned.
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