Coating technology: Common test method of waterproof coating

Core tip: the importance of waterproof coating in home decoration is undoubted, with better waterproof and moisture-proof functions, and relatively simple construction 1、 Film thickness inspection Three points shall be punctured every 100 square meters with needle puncture method, and the height shall be measured with ruler, and the average value shall be taken The film-forming thickness shall be greater than 2 mm When puncturing, color pen should be used to mark for repair 2、 Elongation at break inspection In the waterproof construction, the supervisor can go to the construction site to brush the mixed materials on the flat glass plate several times Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: the importance of waterproof coating in home decoration is undoubted, with better waterproof and moisture-proof functions, and relatively simple construction 1、 For the film forming thickness inspection, three points shall be punctured every 100 square meters by needle puncture method, and the height shall be measured with ruler, and the average value shall be taken The film forming thickness shall be greater than 2 mm When puncturing, color pen should be used to mark for repair 2、 Inspection of fracture elongation in waterproof construction, the supervisor can go to the construction site to brush the mixed materials on the flat glass in several times The thickness of film-forming on the plate (the glass plate shall be waxed first) is 1.2-1.5mm After 7 days, soak in 1% alkaline water for 7 days, and then bake in an oven at 50 ℃± 2 ℃ for 24 hours to do dumbbell type tensile test The elongation retention rate is required to reach 80% (200% without treatment) If the standard is not up to standard, it is indicated that the proportion of emulsion in the construction is insufficient 3、 For water resistance inspection, the coating is applied on the cement block in several times, with film thickness of 1.2-1.5mm, placed for 7 days, immersed in 1% alkali water for 7 days, without stratification or hollowing, it is qualified 4、 The water impermeability inspection shall be carried out with instruments under certain conditions The method is to prepare the coating in proportion and brush it on the glass plate for several times (the glass plate is waxed first) The thickness is 1.5mm It shall be kept for 7 days and then put in the oven at 50 ℃ ± 2 ℃ for 24 hours After taking it out, it shall be placed for 3 hours for water impermeability test The water impermeability is 0.3MPa It is qualified if there is no leakage within 30 minutes If the conditions are not met, visual inspection can be used to check the waterproof effect The method is to brush the coating on the non-woven fabric in 4-6 times After drying out (about 24 hours), the film thickness is 1.2-1.5 mm, which is made into the shape of a slow box and hanging empty, but there is no dead angle Add 1% alkali water into the box, and it is qualified if there is no leakage in 24 hours 5、 Low temperature flexibility inspection: wax the glass plate, apply the mixed coating on the glass plate in several times, with the film thickness of 1.2-1.5mm, remove it from the glass plate after drying, place it indoors (25 ℃± 2 ℃) for 7 days, then cut the strip with the length of 120-150 mm and the width of 20 mm, and refrigerate it Adjust the temperature to - 25 ℃, put the test piece in the refrigerator for 30 minutes, and wind it with a round bar with a diameter of 10 mm in both positive and negative directions once, and it is qualified if there is no crack If there is a crack, the low temperature flexibility of the emulsion is not enough 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,