Coating knowledge: construction technology and characteristics of waterproof coating

The key points are as follows: (1) polymer cement based waterproofing material 1 material polymerized cement based (JS) waterproof coating is made of polymer emulsion and additives made of additives and cement, and the mixture is evenly mixed according to the prescribed proportion, and the waterproof layer is formed after brushing on the base layer The polymer cement-based (JS) waterproof coating is divided into type I, type II and type III, which belongs to the volatile curing type The waterproof system is preferentially used in indoor environment without long-term water bubble, and can be used in combination with other materials in roof engineering 2 Construction sequence: clean and check the base course → repair the base course & rarr 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 Coating home: (1) polymer cement based waterproof material 1 material polymerized cement based (JS) waterproof coating is made of polymer emulsion added additives and liquid cement and cement as the main component of the two components, according to the proportion of mixing and mixing evenly, brush at the base of the formation of waterproof layer after curing The polymer cement-based (JS) waterproof coating is divided into type I, type II and type III, which belongs to the volatile curing type The waterproof system is preferentially used in indoor environment without long-term water bubble, and can be used in combination with other materials in roof engineering 2 Construction sequence: cleaning and inspection of base course → repair of base course → treatment of detail component nodes → construction of additional layer at internal and external corners → application of the first coating → application of the second waterproof coating → application of surface coating → coating quality inspection → closed water test 3 Key points of construction (1) cleaning and inspection of base course: ① the waterproof base course shall be cleaned to ensure that the base course is free of oil, residue, debris and dust ② Check the base course: whether there are holes and unevenness on the base course surface, whether the pipes passing through the floor are dense, whether the distance between the horizontal pipes and the base course is loose, etc (2) Repair the base course: ① if the base course is uneven, loose or porous, the loose part and high part shall be leveled first, and then leveled with 1:3 cement mortar ② If the base pipe root is loose, the loose base shall be removed and repaired with cement mortar or rigid plugging material ③ If there is no arc at the internal and external corners of the indoor waterproof base, it shall be constructed with polymer cement mortar (3) Treatment of detailed structure of waterproof layer ① floor drain or the surrounding area of the pipeline shall be filled with sealant; ② the pipeline extending out of the plane and facade, the surrounding area of floor drain and the internal and external corners shall be coated with additional waterproof coating layer before the construction of large surface waterproof layer 1) Width of additional layer around the pipeline: the height of the additional layer at the pipeline part shall not be less than 100mm, and the width of the additional layer at the waterproof base layer shall not be less than 200mm 2) The width of the additional layer of floor drain is 300 mm, the width of the additional layer extending into the floor drain mouth is not less than 100 mm, and the width of the additional layer around the floor drain is not less than 200 mm 3) The width of the additional layer at the internal and external corners is 300 mm, and the junction is 150 mm above and below the central line ③ If the additional layer is designed with grid cloth reinforcement layer, the grid cloth shall be soaked after paving and shall not be wrinkled (4) Requirements for application of waterproof coating: ① primer Construction: Ingredients: special personnel shall be responsible for material preparation During operation, liquid and water shall be poured into the mixing barrel according to the requirements of the proportion, and powder shall be poured into the adding barrel under the constant mixing of the mixer for at least 5 minutes The mixture shall be uniform and in the form of slurry without powder particles; During the construction, the bottom coating shall be brushed evenly with roller brush or brush, and the bottom coating shall not be exposed The thickness of the coating is 0.2-0.3mm Generally, the next process can be brushed after the interval of 8 hours, and the coating is solidified and does not stick to hands; ② The first coating construction: special personnel shall be responsible for the preparation of materials During the operation, liquid materials and water shall be poured into the mixing barrel according to the requirements of the proportion, and powder materials shall be poured into the adding barrel under the continuous mixing of the mixer for at least 5 minutes, and the mixture shall be uniform and in the form of slurry without powder particles The bottom coating shall be brushed evenly with roller brush or brush, and the bottom coating shall not be exposed The thickness of the coating is 0.4-0.5mm Generally, the next process can be brushed after the interval of 8 hours, and the coating is solidified and non stick; The first coating construction: use roller brush, brush and rubber scraper to evenly brush the bottom coating, without exposing the bottom Generally, the coating thickness of the material is 0.4-0.5mm The coating is required to be solidified and not stick to hands before the next coating process; ③ Coating construction for the second or third time: special personnel shall be responsible for material preparation During operation, liquid and water shall be poured into the mixing barrel according to the requirements of the proportion, and powder shall be poured into the adding barrel under the constant mixing of the mixer for at least 5 minutes The mixture shall be uniform and in the form of slurry without powder particles; During the construction, the bottom coating shall be brushed evenly with roller brush or brush, and the bottom coating shall not be exposed The thickness of the coating is 0.4-0.5mm Generally, the next process can be brushed after the interval of 8 hours, and the coating is solidified and non stick Note: the coating construction requires multiple times of brushing (no less than three times) to meet the thickness requirements (5) Apparent quality inspection: ① check the quality of the waterproof layer before the closed water test, and the waterproof layer of the coating shall be free of bubbles, stratification, blocking and other phenomena; ② before the closed water test, the coating must be cured before completion, so as not to stick hands, peel, and dry corners and pipe roots (6) Closed water test: after the waterproof layer is solidified, the water is stored for 24 hours, and the water level is 2cm higher than the highest point, so it is qualified as no leakage (7) Construction of the protective layer on the upper part of the waterproof coating layer: the surface layer construction can only be carried out after the first closed water test is qualified Finished product protection is required The waterproof layer shall not be damaged during the construction of the surface layer and the protective layer (8) The second closed water test: after the construction of the protective layer or surface layer, the closed water test shall be carried out again If there is leakage, the protective layer shall be removed to check the waterproof layer until there is no leakage （2） Construction technology of acrylic acid waterproof coating 1 see material introduction for waterproof material The acrylic acid waterproof coating is a volatile curing material, which forms a waterproof coating layer by the evaporation of water The waterproof system is suitable for indoor environment without long-term water immersion, and the pure acrylic acid waterproof coating system is suitable for the waterproof engineering of metal roof surface layer 2 Construction sequence: cleaning and inspection of base course → repair of base course → treatment of detail component nodes → construction painting of additional layer at internal and external corners → painting of the first coat → painting of the second waterproof coating → painting of surface coating → coating quality inspection → closed water test 3 Key points of construction (1) cleaning and inspection of base course: ① the waterproof base course after the surface course and other structural layers are removed shall be cleaned to ensure that the base course is free of oil, residue, debris and dust ② Check the base course: whether there are holes and unevenness on the base course surface, whether the pipes passing through the floor are dense, whether the distance between the horizontal pipes and the base course is loose, etc (2) Repair the base course ① if the base course is uneven, loose, holes and other phenomena, the loose parts and high parts shall be leveled first, and then leveled with 1:3 cement mortar ② If the base pipe root is loose, the loose base shall be removed and repaired with cement mortar or rigid plugging material ③ If there is no arc at the internal and external corners of the indoor waterproof base, cement mortar shall be used for construction (3) Treatment of detailed structure of waterproof layer: (1) the floor drain or the surrounding of the pipeline shall be filled with sealant; (2) the pipeline extending out of the plane and facade, the surrounding of the floor drain and the internal and external corners shall be coated with additional waterproof coating layer before the construction of the large-scale waterproof layer, with the thickness of 1mm 1) Width of additional layer around the pipeline: the height of the additional layer at the pipeline part shall not be less than 100mm, and the width of the additional layer at the waterproof base layer shall not be less than 200mm 2) The width of the additional layer of floor drain is 300 mm, the width of the additional layer extending into the floor drain mouth is not less than 100 mm, and the width of the additional layer around the floor drain is not less than 200 mm 3) The width of the additional layer at the internal and external corners is 300 mm, and the junction is 150 mm above and below the central line ③ If the additional layer is designed with grid cloth reinforcement layer, the grid cloth shall be soaked after paving and shall not be wrinkled (4) Brush waterproof coating ① the first coating construction: use roller brush, brush and rubber scraper to evenly brush the bottom coating without exposing the bottom, the general material consumption is 1kg / ㎡, and the coating thickness is 0.4mm, which requires the coating to be solidified and not stick to hands before the next process can be brushed; ② The second coating construction: use roller brush, brush and rubber scraper to evenly brush the bottom coating without exposing the bottom The general material consumption is 1.25-2.5 kg / ㎡, and the coating thickness is 0.5-1 mm The coating is required to be solidified and not stick to hands before the next coating process; ③ The third coating construction: use the roller brush and brush evenly to brush the bottom coating without exposing the bottom The general material consumption is 1.25-2.5kg/m2, and the coating thickness is 0.5-1mm The surface coating can be brushed with a little water to make the surface flat and smooth Note: the coating construction requires multiple coats (no less than three coats) to meet the thickness requirements For every 1mm of coating, the amount of coating is about 2.5kg/m2 (5) Apparent quality inspection: before the closed water test, the quality of the waterproof layer shall be checked Before the closed water test, the waterproof layer of the coating shall be free of bubbles, delamination, blocking and other phenomena Before the closed water test, the coating must be cured before completion, so as not to stick to hands, peel off, and dry corners and pipe roots (6) In the closed water test, after the waterproof layer is solidified, the water is stored for 24 hours, and the water level is 2cm higher than the highest point, and it is qualified if there is no leakage (7) Construction of the protective layer on the upper part of the waterproof coating layer: the surface layer construction can only be carried out after the first closed water test is qualified Finished product protection is required The waterproof layer shall not be damaged during the construction of the surface layer and the protective layer (8) The second closed water test: after the construction of the protective layer or surface layer, the closed water test shall be carried out again If there is leakage, the protective layer shall be removed to check the waterproof layer until there is no leakage （3） One component polyurethane waterproof coating construction 1 waterproof material one component polyurethane waterproof coating is to absorb moisture in the air and solidify, no harmful solvent volatilization The waterproof material should not be used in the exposed environment, such as basement, roof, toilet, pool and other long-term water environment 2 Construction sequence: cleaning and inspection of base course → repair of base course → treatment of detail component nodes → construction painting of additional layer at internal and external corners → painting of the first coating → painting of the second waterproof coating → painting of surface coating → ⑧ coating quality inspection → closed water test 3 Key points of construction (1) cleaning and inspection of base course ① the waterproof base course after the structural layers such as the surface course are removed shall be cleaned to ensure that the base course is free of oil, slag, debris and dust ② Check the base course: whether there are holes and unevenness on the base course surface, whether the pipes passing through the floor are dense, whether the distance between the horizontal pipes and the base course is loose, etc (2) Repair the base course ① if the base course has unevenness, looseness, holes and other phenomena, the loose parts and high parts shall be leveled first