LBT-2101 Concrete Pavement Brick Permeability Tester
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Description
Product Introduction:
This apparatus complies with GB/T 32987-2016 “Test Methods for Properties of Concrete Pavement Bricks” and is used for permeability testing of concrete pavement bricks. The upright columns are made of stainless steel, and the upper and lower pressure plates are coated with electrostatic powder paint on steel plates. The highly transparent acrylic tube features clear graduations.
Technical Specifications:
1. Applicable specimen dimensions: 100×200×50 mm or 100×200×60 mm
2. Graduated cylinder dimensions: inner diameter 60 mm ± 2 mm, height ≥ 300 mm.
3. Open‑area ratio of the base plate: 50% or more
Use the textbook
1. Place the test sample vertically on its side in a water tank (the tank is not included with this instrument). Maintain a minimum spacing of 20 mm between samples, then fill the tank with water at a temperature between 10°C and 30°C, ensuring that the water level is approximately 20 mm above the samples. Soak the samples for 24 hours, then remove them from the water and gently wipe off surface moisture using a sponge or a wrung‑out damp towel.
2. Place the specimen between the upper and lower pressure plates, position a rectangular silicone pad on top of the specimen, and tighten the six nuts using a wrench.
3. Pour water at 10–30°C into the glass cylindrical graduated cylinder, and raise the water level in the cylinder to 200 mm within 1 minute.
4. Record the change in water level after 120 minutes and calculate the permeability using the appropriate formula. If the water level drops by more than 100 mm within 120 minutes, record the time required for the water level to drop by 100 mm and use the formula to determine the permeability. If the water level drops by more than 100 mm within 120 minutes, record the time h required for the water level to drop by 100 mm and calculate the permeability using the formula.
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