ASTM F970-17,Standard Test Method for Measuring Recovery Properties of Floor Coverings after Static Loading.The size of this pdf file is 862K.Now you can download it.
ASTM F970-17 is intended for use in determining the recovery properties of uninstalled resilient floor covering after long-term indentation test, 24 h under the load specified in the detail specification.
5. Sampling, Test Specimens and Test Units
5. 1 The specimens shall be 2 by 2 in. (50, 8 by 50.8 mm)The test unit shall consist of three specimens.
5.2 The central one square inch test area of each specimen should be free of mortar lines or other embossing lines, if possible. If not possible, the largest flat, raised area should be centered on the specimen.
5.3 If the sample is nubble embossed, the specimen should be cut so that a nub is at the center of the specimen where the specimen will be measured.
5.4 A circle slightly larger than the 0. 250 in. (6.35 mm) diameter foot of the thickness gauge (4.5) is drawn on the wearlayer at the center of the specimen, using the PMMA template (4.6),to ensure that thickness measurements are made at the same spot.
9 Report
9.1 Report the following information:
9. 1.1 Complete identification of the product tested including type, source and manufacturers reference numbers,
9. 1.2 The applied load,
9.1.3 The residual indentation for each specimen, and
9. 1. 4 The average residual indentation.