Product Introduction

1Sodium based bentonite waterproof blanket permeability coefficient testerIntroduction: This measuring instrument is developed and manufactured according to the JG/T193-2006 standard for determining the permeability coefficient of sodium based bentonite waterproof blankets. It is suitable for measuring the permeability coefficient of sodium based bentonite waterproof blankets under a certain pressure difference, which will produce small seepage. The permeability coefficient can be calculated by measuring the seepage flow rate and sample thickness passing through the sample for a certain period of time under a specified hydraulic pressure difference. IISodium based bentonite waterproof blanket permeability coefficient testerTechnical parameters of the manual 1 Sample size: ￠ 70mm2. Large test force: 50MPa. 3. External dimensions: 600X750X19004. Whole machine weight: 150Kg. 3Instruction manual test procedure 1. Connect to the water supply pipe ⑴ Cut two filter papers with a diameter of 70mm ± 2mm, immerse two permeable stones and filter papers in a container containing deionized water or removed water. Apply a thin layer of high vacuum silicone grease on one side of the bottom cover. Install a permeable stone on the base of the infiltration chamber, lay filter paper, sample, and filter paper on top of the permeable stone in sequence, and then install the top cover after placing the permeable stone. Place a flexible film around the sample (the film should be able to withstand sufficient hydraulic pressure), and then install "o" rings at both ends of the sample. 2. Fill the infiltration chamber with water, connect the pipeline between the water supply chamber and the infiltration chamber, and simultaneously connect the entire hydraulic system. Apply a small pressure (7KPa~35KPa) on the infiltration chamber, and apply smaller pressure on the upper and lower parts of the sample to make the water in the entire hydraulic system flow. Then open the valve on the exhaust pipeline to discharge visible bubbles in the inlet and outlet pipelines, as well as visible bubbles in the upper and lower parts of the flexible film sample. 3. Adjust the initial pressure of the permeation chamber to 35KPa, and adjust the initial back pressure of the upper and lower parts of the sample to 15kpa. Slowly increase the pressure of the permeation chamber and the upper and lower parts of the sample, and maintain this state for 48 hours to achieve saturation of the sample. 4. Conduct permeability coefficient measurement experiments. Increase the pressure at the lower part of the sample to 30KPa, and start measuring the permeability coefficient after the pressure stabilizes. Test the flow rate through the sample and the water pressure difference across the sample every 1 hour. When the following requirements are met, the experiment can be ended: (1) The number of tests conducted within 8 hours shall not be less than 3 times; In the following three consecutive tests, the ratio of inlet flow rate to outlet flow rate should be between 0.75 and 1.25; The flow values measured three consecutive times should not show a significant upward or downward trend; After measuring the flow rate three times in a row, take out the sample at the average flow rate, measure and record the height and diameter of the sample at the end of the test.