GB/T 9966.5-2020 specifies the test method for the hardness (Shore hardness) of natural stone. It uses a Shore hardness tester, in which a diamond indenter of specified shape is allowed to fall freely from a fixed height onto the stone surface. The hardness value is determined by measuring its rebound height, which indirectly reflects the wear resistance and processing performance of the stone.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | Q21 | ICS | 91.100.15 |
| Release Date | 2020-03-06 00:00:00 | Implementation Date | 2021-02-01 00:00:00 |
