Geotextile effective aperture tester (wet sieving method)

One,Geotextile effective aperture tester (wet sieving method)Overview

This instrument is suitable for determining the effective pore size of all types of geotextile products, and its performance meets the requirements of the national standard GB/T17634 "Determination of Effective Pore Size of Geotextiles and Related Products - Wet Sieve Method".

Principle: Using a sample of single layer geotextile and related products without tension as a sieve, spray water on the sample and graded granular material (i.e. sand) at a specified vibration frequency and amplitude to allow the graded material to pass through the sample.

Secondly,Geotextile effective aperture tester (wet sieving method)Technical parameters:

1. Inner diameter of gripper: 130mm

2. Vibration frequency: 50Hz

3. Amplitude: 1.5mm

4. Nozzle pressure: 300kPa, water output: 0.5L/min

5. Time: adjustable from 0 to 999.9s

6 Power supply: AC220V 50HZ

Three,Instrumentation

1. The instrument consists of a machine base, container, gripper, control pipeline, nozzle, control circuit, etc. It is fixed on a flat and stable workbench

2. Clamp the sample, loosen the compression nut, place the sample on the clamp, press the clamp and tighten the nut.

3. Connect the power supply and turn on the power switch. Before the test, be sure to set the required time according to the test requirements. The method is to press the setting button once, and the number will start flashing. Enter the desired time, press the shift button to shift the number, and press the adjustment button to increase the number. After the time is set, press the setting button to store the data, and the instrument will return to the working state. If you press the start button once, the time starts counting, stops when the set time is reached, and restarts when you press the start button

4. Test procedure: Install the sample prepared according to the standard on the gripper, evenly sprinkle the granular material on the sample, turn on the water spray switch, spray water evenly on the entire sample, adjust the water volume with a regulating valve to ensure that the granular material is completely moist, but do not allow the water surface to be higher than the granular material. Keep spraying water throughout the screening process, start the screening device, screen for 600 seconds, turn off the water spray switch, collect the sample and the failed granular material, and calculate the percentage of passing and lost granular material according to the standard.