Waterproof coating test method of commonly used indicators

Film thickness check needle puncture method should be adopted for each 100 - square - meter three points, measuring its height, with your ruler, take the average film thickness should be greater than 2 mm. Piercing used crayons do mark, in order to repair. Breaking elongation check in waterproof construction, supervision personnel to the construction site will mix well, besmear to brush in flat glass many times ( Glass should be waxing) 1, film thickness. 2 - 1. 5 mm, placed in 7 days, soaked in 1% caustic soda for 7 days, and then in 2 ℃ to 50 ℃ soil oven baked for 24 hours, do dumbbell tensile experiment to keep the rate of 80% ( No treatment is 200%) 。 If can not meet the standard, in the construction of the emulsion mixed with less than. Water resistance check several times to paint coating on concrete, film thickness 1. 2 - 1. 5 mm, place, 7 days in 1% caustic soda for 7 days, no separation, no empty drum for qualified. Impervious to check under the conditional, the application of instrument detection, the method is to paint in proportion with good, points repeatedly coating on the glass plate ( Glass wax first) , the thickness of 1. 5 mm, static put seven days, and then put the person inside the oven to 50 ℃ + 2 ℃ drying for 24 hours, remove the placement after 3 hours, impervious experiment, impervious to 0. 3mpa。 Keep no leakage for qualified for 30 minutes. If conditions do not have, can use visual method to check the waterproof effect, method is to paint points, 4 - 6 times coating on the non-woven, dry after appearing, About 24 h) Film thickness is 1. 2 - 1. 5 mm, make it slow box shape hanging empty, but may not have a corner, then add 1% caustic soda box, no leakage for qualified for 24 h. Check g type polymer waterproof mortar bond, '8' type, can be directly forming the mold after 24 hours. Release the water soak 6 days, indoor temperature is 25 ℃ + 2 ℃ dry maintenance for 21 days, bonding experiment. G type waterproof mortar, ash: water: gum = 1-0. 11:0. 14, g type waterproof mortar to 2. 3mpa。 R type coating and sesame paste shape, and good paint besmear to two and a half '8' the word mortar block, placed 7 days do bonding experiment, r type ratio ( High elastic) , powder: gum = 1:1. 4. ( Shot) , powder: gum = 1-0. 8 - 1. R is 0. 5 mpa, greater than or equal to bond index is qualified. Low tender degree check wax on the glass, the construction site several times coating mixture besmear to brush on the glass, film thickness of 1. 2 - 1. 5 mm, dry after removed from the glass plate, placed indoor, 25℃±2℃) Seven days, and then cut 120 - long 150 mm and 20 mm wide strip, the temperature of the refrigerator to - 25 ℃, put the refrigerator for 30 minutes, the specimen with a diameter of 10 mm round rods and the coil, no crack is qualified. If there is any crack emulsion low gentle enough. Note: g type waterproof mortar only do regular check, waterproofness, bond strength test. Sample specimens should do in the construction field sampling, besmear brushs specimens using cross crossover method. Each coating film thickness is 0. 25 - 0. 35 mm.