21/30395144 DC
BS ISO 8840. Refractory materials. Determination of bulk density of granular materials (grain density)
| Označení normy: | 21/30395144 DC |
| Počet stran: | 20 |
| Vydáno: | 2021-02-23 |
| Status: | Draft for Comment |
21/30395144 DC
This standard 21/30395144 DC BS ISO 8840. Refractory materials. Determination of bulk density of granular materials (grain density) is classified in these ICS categories:
- 81.080 Refractories
This International Standard specifies three methods for the determination of the bulk density of granular refractory materials (grain density) having a grain size larger than 2 mm:
Method 1 : the mercury method with vacuum,
Method 2 : the arrested water absorption method,
Method 3 : spin dryer method with vacuum according to ISO 5017.
Method 1 is intended as the reference method.
Depending on the nature of the material tested, the three methods may give different results. Any statement of the value of a bulk density may therefore be accompanied by an indication of the method used or to be used in case of dispute.
The same method may be used for the determination of the volume of the sample, for selecting and preparing the sample, for calculating the bulk density and for presenting the test report.