Geotextile wear tester [Operational use] - Huaqiang Electronic Network

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Geotextile Wear Tester

Operating Instructions

1. Prepare the test specimens in a standard atmosphere as specified in GB6529 to ensure consistent testing conditions.

2. Place the calibrated specimen on a stationary upper plate and secure it with clamps at both ends. Position the abrasive material on the reciprocating lower plate and clamp it similarly.

3. Align the specimen with the abrasive by carefully placing the upper plate over the lower one.

4. Apply a total load of (6 ± 0.01) kg onto the upper plate, including its own weight, to simulate realistic wear conditions.

5. Turn on the power switch and set the desired number of wear cycles. The tester will begin the process at a frequency of 90 cycles per minute, performing 750 cycles or until the sample is worn through. If the sample breaks before the cycle count is completed, record the number of cycles and the condition of the worn sample. In case of any abnormality during the test, press the stop button, clear the counter, and prepare for the next test.

6. If the specimen or abrasive slips during clamping, discard the sample and retest after adjusting the setup. Replace the abrasive after each test, and follow CB/T3923.1 guidelines for reference and wear samples. Ensure proper stretching of the samples during testing.

7. Calculation and Representation of Results:

Calculate the percentage of strength loss for each test group to the nearest 1% using the formula:

Strength Loss Rate (%) = [(FA - FB) ÷ FA] × 100

Where: FA = Reference fracture strength, in Newtons (N) FB = Breaking strength of the worn sample, in Newtons (N)

Calculate the average strength loss rate and its coefficient of variation for the five test groups.

8. Test Report:

The test report should include the following details:

a) The standard number used for testing. b) Sample identification according to GB14798 provisions. c) Direction of the subject and front/back orientation. d) Average strength loss rate in percentage. e) Coefficient of variation for strength loss. f) Any deviations from the standard procedures, such as changes in cycle count or applied load. g) Any abnormal conditions encountered during the test, such as unexpected wear or damage.