Geotextile wear tester method - Database & Sql Blog Articles

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According to GB/T17636 "Geotechnical cloth and related products - Determination of anti-wear performance of abrasive cloth / slider method". Used to determine the abrasion resistance of woven geotextiles, nonwoven geotextiles and related products. Principle: Fix the sample on the platform, and rub the abrasive with the specified surface characteristics under the specified pressure and friction action. Finally, test the tensile strength before and after the friction, and describe the sample with the percentage of strong loss. Wear resistance.

Technical Parameters:

1, the upper plate: 50mm × 200mm

2, the lower plate: a) size: 50mm × 200mm

b) Stroke: 25±1mm

3, frequency: 90 times / minute

4, sample bearing weight: 6 ± 0.01kg

5, the number of friction: 2 - 99999 times, arbitrarily set.

6, the external dimensions: 935 × 275 × 350mm

【Instructions】:

Test the tested specimens in the standard atmosphere specified in GB6529.

Place the calibrated specimen on a stationary upper plate and clamp the specimen with a clamp at both ends of the plate. The abrasive is placed on a reciprocable lower plate and clamped at both ends of the plate with a clamp.

Place the upper plate on top of the lower plate to align the sample with the abrasive.

A load of a total of (6 ± 0.01) kg including the weight of the upper plate was applied to the upper plate.

Turn on the power switch and set the required wear cycle. The tester turns on the wear test. The machine works at a frequency of 90 cycles per minute, grinding 750 cycles at the specified frequency, or until the sample wears through. If the sample is worn through before the specified period, the number of cycles during the wear of the sample and the wear of the sample shall be reported. If there is an abnormal situation in the middle, press the stop button to stop, and press the counter to clear the next test. key.

If the sample or abrasive slips in the clip, discard the sample, test another piece after the wake-up adjustment, replace the abrasive after each test, and stretch the reference and wear samples according to CB/T3923.1. test.

Calculation and representation of the results:

Calculate the percentage of strength loss for each set of tests to the nearest 1%:

Strong loss rate (%) = [ (FA-FB) ÷FA] × 100

Where: FA - reference fracture strength, N;

FB—the breaking strength of the wear sample, N.

Calculate the average percent strength loss and its coefficient of variation for the five groups of samples.

experiment report:

The test report should include the following:

a) the number of this standard;

b) identification of the sample (according to the provisions of GB14798);

c) the direction and front and back of the subject;

d) average strong loss rate, %;

e) coefficient of variation of strong loss, %;

f) deviate from any details of this standard, such as the number of cycles, load, etc.;

g) Abnormal conditions in the test, such as wear and tear.

[Test completed] Wipe the instrument clean for the next use.