Coating process: quality inspection standard for waterproof coating

The main results are as follows: 1 Testing of flexibility at - 25 ℃ Apply wax on flat glass, apply one layer of prepared waterproof coating horizontally and straightly at an interval of 2 hours, with the film thickness of 1.0-1.5mm After 8 hours, remove it from the glass plate when it feels dry with fingernail Place it indoors for 7 days at (25 ℃± 2 ℃), then cut the strip with length of 20cm and width of 2cm, place it at - 25 ℃, put the sample in half an hour, and use pencil to turn it forward and backward If there is no crack or fracture, it is qualified for low temperature flexibility test 　 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 Paint Home News: 1 Flexibility test at - 25 ℃ low temperature: apply wax on flat glass, apply one layer of prepared waterproof paint horizontally and vertically, with an interval of 2 hours, coating The thickness is 1.0-1.5 mm After 8 hours, remove it from the glass plate when it feels dry with the nail Place it in the room for 7 days at the temperature of (25 ℃ ± 2 ℃), then cut the strip of 20 cm in length and 2 cm in width Place it at - 25 ℃, put the sample in the room for half an hour, and wind it with the pencil once in front and back respectively If there is no crack or fracture, it is qualified for the low-temperature flexibility test II Fracture elongation inspection: In the waterproof construction, the waterproofing materials which are well stirred are repeatedly painted on the waxed flat glass plates, and the film thickness is 1 to 1.5 millimeters After 7 days of placement, soak in about 1% of the alkaline water for 7 days Then, in the thermostat, it is adjusted to 50 degrees, 2 minutes at the soil temperature for twenty-four hours, and dumbbell type tensile tests are performed The elongation rate is 80% For the extension of fracture inspection qualified, if not qualified can increase the amount of emulsion 3、 Adhesion inspection: high polymer waterproof mortar can directly form the "8" shaped formwork, and the formwork will be released 24 hours later Immerse in human water for 7 days, dry cure at 25 ℃± 2 ℃ for 28 days, and do bonding test Polymer waterproof mortar, ash: water: glue = 1:0.11:0.14, polymer waterproof mortar is 2.3mpa Mix the polymer waterproof coating to make paste, apply the mixed coating to two half "8" mortar blocks, and put them for 7 days to do the bonding experiment The ratio of polymer waterproof coating (high elastic), powder: glue = 1:1.4; (medium elastic), powder: glue = 1:0.8-1 The low molecular weight waterproof coating is 0.5MPa, and it is qualified if it is greater than or equal to the bonding index 4、 Water impermeability inspection: in the laboratory, the special instrument is used for testing The method is to prepare the coating in proportion and brush it on the waxed glass plate for several times The thickness of the coating is 1.5mm, which is kept for 7 days Then it is put in the oven at 50 ℃± 2 ℃ for 24 hours After taking it out, it is placed for 3 hours for water impermeability test The water impermeability is 0.3MPa If there is no leakage or wet printing for 30 minutes, the waterproof effect can also be inspected by visual inspection The method is to brush the coating on the non-woven fabric for 4-6 times After drying out (about 24 hours), the film thickness is 1.0-1.5mm, which is made into the shape of shoe box, and then add 1% alkali water into the box If there is no leakage after three days, it is qualified 5、 Water resistance inspection: the coating is applied on the cement block for many times, with a film thickness of 1.0-1.5mm, placed for 7 days, immersed in 1% alkali water for 7 days, without delamination, peeling and hollowing, it is qualified 6、 Film forming thickness inspection: puncture three points every 100 square meters with needle puncture method, measure its height with ruler, take its average value, film forming thickness should be greater than 1.5mm Mark the puncture for repair 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,