What are the key points and contents of the quality control of waterproof material?
4, high-polymer modified asphalt waterproofing membrane: check the counterfeit effective and simple method is to cut the film wrapped down and then placed in the refrigerator freezer placed 3 hours after the removal, gently forced to break will be broken, and the national standard Require material low temperature flexibility to reach -20 ℃.
1, polymer cement waterproof coating: it consists of a variety of water-based polymer emulsion and a variety of additives mixed with high-quality cement powder composition. Because of its high cost of polymer emulsion components (about 19,000 yuan / T), and the low cost of powder (about 800 yuan / T), it is because the liquid material, powder huge spread, the vast majority of fraud is to use 801 Glue + fossil powder + green dyestuff + cement blending; the other is to change the liquid material, the proportion of powder will be your liquid material consumption, as much as possible to increase the amount of powder. Resulting in poor waterproof coating adhesion, intolerance, after the completion of the finished product should not be too hard to pull down by hand, and was not much ductility of the sheet or even hand rub a few times into a powder, with blisters Will break down into small pieces. Can also be used to cut the finished product coating and then placed in the refrigerator freezer room after 8 hours to remove, gently forced to break will be broken, and the national standard requirements of the material to achieve low temperature flexibility -10 ℃.
2, ordinary two-component polyurethane: A material is similar to the appearance of edible oil translucent yellowish curing agent from polyether and isocyanic acid by polycondensation of polyurethane prepolymer (about 20,000 yuan / t), B material For the plasticizer, coagulant, fillers and other components of the black liquid (about 3900 yuan / t), after mixing the polyurethane coating is also black. But also because of A, B material of the huge spread so often the following two kinds of fraud: ① with a very cheap black oil (priced at only about 1,200 yuan / t), diluted with xylene after thin coating twice. Cold oil is not easy to dry after the coating, after each coating must be drying a few days, in the winter with roasted, and then do not sprinkle dry powder cement, so a long time paint are dry. ② is often used to expand the proportion of A, B components such as 1: 4-6 (usually 1: 2), but also in the polyurethane mixing process by adding cement powder as a filler, if the stirring is not added xylene diluted Agents and other methods of fraud.
3, infiltration of crystalline cement-based waterproof coating: on-site fraud is to use ordinary cement mixed with seafood powder (or 801 glue) so that the cement after the solidification of the color, it will not crack. Genuine infiltration of crystalline cement-based waterproof coating will have a hydrophobic effect that is the effect of lotus leaf water droplets (of course, this hydrophobic effect can not be too much, otherwise it will affect the next process of bonding).
