What does the detection method of waterproof coating have?
One. Film thickness inspection
The needle puncture method should be adopted to puncture three points per 100 square meters. The height should be measured with a ruler, and the average value should be taken. The film thickness should be greater than 2 mm. The puncture should be marked with colored pen for repair.
Two. Fracture elongation inspection
In the waterproof coating
construction, the supervision personnel can go to the construction site to mix the good material, multiple times of coating on the flat glass plate (the glass plate should be waxed first), film thickness of 1.2-1.5 mm, place after 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, extension is asked to keep rate of 80% (no treatment was 200%). If not up to the standard, it means that the proportion of emulsion in the construction is insufficient.
Three. Water resistance test
Divide coating besmear brush on cement block for many times, become film ply 1.2-1.5 millimeter, place 7 days, soak 7 days in 1% alkaline water, not stratification, not empty drum is eligible.
Four. Impermeability check
Under the conditions, the application of instrument testing, the method is to paint in proportion to the good, divided into multiple inorganic coating
on the glass plate (the glass plate first wax), thickness is 1.5 mm, static put seven days, and then put one in the oven to 50 ℃ + 2 ℃ drying for 24 hours, after being removed and placed for 3 hours, the water impermeability test was conducted, and the water impermeability was 0.3MPa. Keep no leakage for 30 minutes.
If the condition does not have, usable visual survey law checks waterproof effect, the method is coating cent 4, 6 besmear is brushed go up to nonwoven cloth, dry after (about 24h) become film ply is 1.2-1.5 millimeter, make it slow box shape condole is empty, but must not stay dead Angle, add 1% alkaline water again inside the box, 24h does not have leakage to be eligible.
Five. Adhesion inspection
G type polymer waterproof mortar, can be directly formed "8" type, 24 hours after the mold. Release the water soak 6 days, indoor temperature is 25 ℃ + 2 ℃ dry maintenance for 21 days, bonding experiment. G type waterproof mortar, ash: water: glue = 1:0.11:0.14, G type waterproof mortar is 2.3mpa.
The R paint and into tahini sauce, and the good paint coated to two and a half "8" word mortar block, placed for 7 days to do bond experiment, R ratio (high elastic), powder: glue = 1:1.4; (shot), powder: glue = 1:0.8 -1. The R type is 0.5mpa, and the adhesion index greater than or equal to is qualified.
Six. Low gentleness inspection
Waxing on the glass plate, apply the mixed polyurea coating
on the glass plate for several times, the film thickness is 1.2-1.5mm. Dry after taking it from the glass, place indoor (25 ℃ + 2 ℃) for 7 days, and then cut 120-150 mm long, 20 mm wide strip, the temperature of the refrigerator to 25 ℃, put the sample in the refrigerator for 30 minutes, use diameter 10 mm round rod positive and negative winding once, no crack is qualified. If there are cracks in the emulsion that low tenderness is not enough.
Note: G type waterproof mortar is only used for routine inspection, water tightness and bond strength inspection. The samples should be sampled at the construction site and painted by the cross method. Each brush film thickness of 0.25-0.35 mm.