Coating knowledge: introduction of polymer cement-based waterproof coating

Core tip: polymer cement based waterproofing coating (JS waterproof coating) is composed of synthetic polymer emulsion (such as polyacrylate, polyvinyl acetate, styrene butadiene rubber latex) and various additives, and is composed of two kinds of waterproofing coatings, composed of special cement and graded sand It is a synthetic polymer material The material has high elasticity and waterproof material with good durability of inorganic material Polymer cement based coatings contain both organic polymer emulsion and inorganic cement The organic polymer coating has good flexibility, low critical surface tension, good decoration effect, but insufficient aging resistance Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings: polymer cement-based waterproofing Coating (JS waterproof coating) is composed of synthetic polymer emulsion (such as polyacrylate, polyvinyl acetate, styrene butadiene rubber latex) and various additives The two component waterproofing coating is composed of special liquid cement and graded sand It is a synthetic polymer material with high elasticity and inorganic material durability Good waterproof material Polymer cement based coatings contain both organic polymer emulsion and inorganic cement Organic polymer coating Good flexibility, low critical surface tension, good decoration effect, but insufficient aging resistance Cement is a kind of hydraulic cementitious material, which has strong adhesion with wet base, excellent moisture resistance, high compressive strength, but poor flexibility The combination of the two can make organic and inorganic combination, complement each other's advantages, improve the permeability resistance, improve the compression ratio, and have superior comprehensive performance, To achieve better waterproof effect The main characteristics are as follows: 1 The active ingredients in the slurry can penetrate into the pores and microcracks in the cement base, produce chemical reactions, and penetrate into the internal crystallization of the base material to form a dense waterproof layer; 2 It can cover hairlike cracks (less than 0.4mm), resist and slightly vibrate; 3 It can be constructed on a wet base without mortar protective layer, and can be directly pasted with ceramic tiles and other subsequent processes; 4 The crystal penetrates into the pores of the base material, with high impermeability and compressive strength, and has the waterproof function of the negative water surface; 5 It is non-toxic and harmless, and can be directly used in drinking pools and fish pools; the coating has the function of depressive mold growth, and can prevent the pollution of moisture and salt on the surface Scope of application: 1 Indoor and outdoor concrete structure, prefabricated concrete structure, cement plastering bottom, brick wall, light brick wall structure; 2 Floor wall, floor, toilet, kitchen, flower trough; edible water pool, fish pool, sewage treatment pool; 3 Basement, subway station, tunnel, human defense engineering, mine, building foundation; 4 It can be applied to the base material before laying stone, tile, wood floor, wallpaper and gypsum board for pre-treatment, so as to prevent moisture and salt pollution Construction process: base cleaning → reinforcement layer construction → joint sealing → wetting base surface → painting for the first time → maintenance → painting for the second time → maintenance → protective layer construction (choose to do or not to do according to the specific situation) construction preparation 1 Carefully check the base of waterproof layer, carefully deal with the defects and clean up (1) The base course shall be flat, smooth, free of sand and skin, with certain strength, the drainage slope shall meet the design requirements, and the internal and external corners shall be rounded or sloped with a diameter of no less than 30mm (2) If the base surface is dry, the base surface must be pre wetted in advance to keep the base surface moist, but there shall be no open water (3) The defects of the base course shall be treated first before the construction can continue ① In case of unevenness, pit and ponding, it can be filled and leveled with Tego synthetic latex cement mortar ② The peeling on the surface shall be removed 2 For the repair of the old waterproof layer, the adhesion on the base course shall be removed and leveled If the surface of the old waterproof layer is flat and the material is not invalid, and it is compatible with K11 waterproof slurry, the construction can be continued directly on it Waterproof slurry construction K11 waterproof slurry construction (the products of Dr waterproof have been configured according to the comparative example, and can be mixed directly) 1 Coating preparation ① batching and weighing must be accurate, and each weighing error shall not exceed ± 5% Ratio: General K11 waterproof slurry ratio: additive: powder = 0.36:1; flexibility K11 (I) waterproof slurry ratio: additive: powder = 0.80:1; flexibility K11 (II) waterproof slurry ratio: additive: powder = 0.68:1; ② According to the proportion and sequence, first pour the additive into the container, then pour the powder, and at the same time, use the electric stirring drill to stir, and fully stir to the paste without sedimentation Judge whether it is even or not: the pulp is not even with raw meal ③ After mixing, it needs to be placed for 5-10 minutes, and can be used only after mixing again; ④ during the operation, it should keep intermittent mixing to prevent precipitation 2 After the preparation of base course and the inspection of base course are qualified, the floating ash, lime sand and gravel lumps on the surface shall be cleaned, and then the next process construction shall be carried out after wetting 3 The reinforcement layer and node treatment reinforcement layer are mainly aimed at the weak link of the construction part, that is, the part easy to cause leakage Strengthen the treatment to improve the waterproof safety performance and ensure the waterproof effect ① In the parts to be strengthened, such as internal corners and pipe orifices, the flexible K11 waterproof slurry shall be applied for 1-2 times first, and the width shall meet the design or specification requirements ② For the parts where the carcass reinforcement material needs to be laid, the cut carcass material can be tiled after the reinforcement coating is dry, and then pasted with K11 waterproof slurry 4 Coating construction ① when the thickness of the coating layer is within 1.5mmm, it shall be divided into two times; when the thickness is within 1.5mm, it shall be divided into three times After the first coat, the second coat shall be applied after the initial dry consolidation (interval 2-4 hours) Judge the initial dry fixation standard: the wall feel has been dry, touch does not fall off The floor needs a little longer time, depending on people walking will not damage the waterproof layer ② The painting shall start from the lowest part of the plane to the farthest distance from the loading opening When the facade and plane need to be constructed, the facade shall be constructed first and then the plane ③ According to the requirements of the quantity of one-time mixing and the thickness of one-time brushing, the construction surface shall be divided, and the materials for each mixing shall be controlled to use up on this area, so as to ensure the accuracy of coating thickness ④ During the plane coating and scraping construction, evenly pour the mixed coating on the base surface according to the dosage, and scrape it evenly with a brush The two degrees of coating and scraping on the plane shall be perpendicular to each other During the construction of facade painting, the brushing direction of the brush shall be from the bottom to the top Pay attention to the timely scraping of the slurry flowing to the internal corner to avoid cracking due to excessive accumulation 5 When the first coat can be dried and fixed before the second coat construction, the quality of coating and scraping shall be carefully checked one by one to check whether there is missing coating and sand hole, and timely make up 6, after initial drying and solidification, spray type should be used for sprinkling and water conservation to achieve the best results 7 Construction shall not be carried out in rainy, snowy and windy days Construction shall not be carried out in foggy days until the dew is dry No rain shall be allowed within two hours of construction Rain proof measures shall be taken in case of rain during construction 8 When protective layer is applied on K11 waterproof layer, it shall be bonded firmly When the polyethylene foam board is used as the protective layer, it should be stuck When the rigid protective layer such as cement mortar, fine stone concrete and block is used for construction, the transport vehicle must not directly walk on the waterproof layer or directly hit the waterproof layer with iron clenches and other sharp objects The construction amount of waterproof layer is applied twice, with a thickness of about 1mm The amount of slurry is: 1 General K11 waterproof slurry: 2.0kg/m2 2 Flexibility K11 (I) waterproof slurry 1.8kg/m2 Project quality requirements and acceptance 1 After the completion of coating construction, before the construction of rigid protective layer The coating waterproof layer shall be comprehensively and carefully inspected, and the air holes, scratches, punctures and damages found in the inspection shall be repaired immediately, and the finished waterproof layer shall not leak 2 Check that there is no sand hole between each coating 3 After 7 days of curing, the completed waterproof layer shall be subject to 24-hour closed water test when conditions permit, and it can also be checked for leakage after rain or water spraying for 24 hours Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,