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    Home > Coatings News > Paints and Coatings Market > Common sense of coating: construction mistakes of cement-based waterproof coating

    Common sense of coating: construction mistakes of cement-based waterproof coating

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: polymer cement based waterproofing coating is made from synthetic polymer emulsion (such as polyacrylate, polyvinyl acetate, styrene butadiene rubber latex) The two-component waterproof coating, which is composed of liquid materials and matched powder materials (composed of special cement and graded sand), is a kind of waterproof material with high elasticity of synthetic polymer material and good durability of inorganic material Cement based waterproof coating construction error, cement, construction, waterproof coating, error Material is the foundation, construction is the key Even if the material is better, no 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 Coatings home: polymer cement based waterproofing coating is made from synthetic polymer emulsion (such as polyacrylate, polyvinyl acetate, styrene butadiene rubber latex) The two-component waterproof coating, which is composed of liquid materials and matched powder materials (composed of special cement and graded sand), is a kind of waterproof material with high elasticity of synthetic polymer material and good durability of inorganic material Cement based waterproof coating construction error, cement, construction, waterproof coating, error material is the foundation, construction is the key even if the material is no good, no formal construction can not guarantee the construction quality In the after-sales problem, many customers think it is a product problem, but after our personnel's actual construction operation on site, it is verified that there is no problem with the product, which is a construction problem What are the problems in the construction? The reason for the appearance of problem1 waterproofing coating is generally due to the fact that the stacking material is very thick In case of not completely drying, the emulsion does not form a complete coating, and less cement based materials can not completely fix the fillers due to hydration So what should I do? 1 Clean the falling materials at the internal corners in time 2 Wait patiently for the waterproof layer to dry completely and then brush it one by one to a sufficient thickness Problem2 The bonding with the base course is not firm (brick falling) Cause analysis: Generally speaking, the base treatment is too poor, very soft base (such as aerated brick, light wall, poor mortar base), a lot of floating ash and fine sand particles, and the strength is very low; this will lead to the peeling phenomenon of the waterproof layer, and after tiling, the waterproof layer will fall off due to the weight of the brick Requirements: 1 The base course shall be solid, flat, free of sand, hollowing and cracks 2 For the base course with laitance, dust, unevenness, sharp objects and other phenomena, it is necessary to repair and level the problem m3 Closed water foaming phenomenon The reason is: foaming is divided into two kinds First, the bubbling between the waterproofing layers is due to the partial dry water of the surface waterproofing layer, which causes local water leakage After infiltration, the emulsion film absorbability and swelling, causing the waterproof membrane to stretch and drum up; secondly, the water layer and the base layer start to drum up, because the water layer is not well bonded, and the moisture in the base layer is too much, which will provide a penetration for the waterproof layer Pressure causes bulge in the area with poor adhesion Note: in order to avoid blistering between the waterproof layers, it is necessary to wait until the previous coating is completely dry before the construction of the next coating; the bulge between the waterproof layer and the base course shall be removed, and the bulge part shall be repainted after the moisture is exhausted Problem4 Cracking of waterproof layer Cause analysis: the cracking is divided into detail cracking and large surface cracking First, the internal corner and pipe root cracking are generally caused by the sagging of the facade, which causes the waterproof layer to be too thick, the stress contraction to be very large, and the stress of the right angle internal corner structure cannot be released, so that the tensile force is too large, which leads to the cracking Second, the large surface cracking is generally caused by the uneven base course, which leads to the stacking of materials at the gap, In addition, for JS (jiashitu 100), cement is very easy to cause cracking; requirements 1 For internal and external corners, pipe roots, floor drains and other detailed nodes, it is necessary to plaster the splayed corner or arc details 2 The base course shall be solid, flat, free of sand, hollowing and cracks For the base course with laitance, miscellaneous dust, unevenness, sharp objects and other phenomena, it is necessary to repair and level them Tips for use: 1 Mixing: first pour liquid material (jiashitu 100 can be added with water, no more than 15%), mix evenly, then pour powder material, fully mix evenly with an electric mixer; in order to reduce the bubble in the slurry, it needs to stand for several minutes and then mix again; 2 Brushing: the base layer should be fully wetted but free of open water, so as to minimize the floating ash The better base course can be wetted, such as aerated brick, light wall, inferior mortar base course, etc., which need to be treated once by mixing water and glue Control the thickness of internal corners, and do not stack materials The first time as thin as possible, second times and third times normal brush; must be completely dry before the next coating; because JSA class waterproof coating contains more emulsion, and less active material, which makes the emulsion shrink film cracking process is more easy, which makes the JS waterproof coating used in dealing with the negative angle should be thinly coated multiple times, reduce the risk of cracking 3 Closed water: the closed water test must be conducted after it is completely dry 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,
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