Instrument: Floor residual depression test machine >
Sample: Take 3 sample samples with 3 sizes with 60mm*60mm on the coil floor
marked the measurement point on the sample sample, and measure the thickness of the point in accordance with the regulations. Place the wear layer up on the work platform of the depression test machine, and load (500 ± 0.5) n evenly on the marked point. Start at 2S, keep 150min, then remove the load, place 150min under the standard test conditions, and then measure the thickness of the measurement point to measure the thickness of the measuring point, which is accurate to 0.01mm.
Residual depression test machine test results:
Residual depression is calculated according to the formula below Arithmetic average value representation.
d T0-T1 > D —— The residual depression, the unit is millimeter (mm);
T0 —— The thickness of the test piece before the load, the unit is millimeter (mm);
T1 —— After the load is 150 minutes The unit is millimeter (MM).
Floor residual depression test machine
Also known as the floor residual indentation test machine, the test machine is a method to determine the residual depression of the elastic floor. Essence The difference between the initial thickness and the thickness measured after the loading is removed, and the distance between the floor materials between the two parallel boards under the specified loading capacity. The sample is subject to static static, and the thickness before the force is measured and the thickness after the recovery period.