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BS ISO 8840:2021

BS ISO 8840:2021

$102.76

Refractory materials. Determination of bulk density of granular materials (grain density)

Published By Publication Date Number of Pages
BSI 2021 22
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This document 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: mercury method with vacuum;

  • Method 2: arrested water absorption method;

  • Method 3: vacuum method with spin dryer option according to ISO 5017 .

Method 1 is intended as the reference method.

NOTE

Depending on the nature of the material tested, the three methods can give different results. Any statement of the value of a bulk density can therefore be accompanied by an indication of the method used or to be used in case of dispute.

The same method can 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.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Principle
5 Sampling
6 Preparation, number and test size of samples
6.1 Preparation of samples
6.2 Number of samples
6.3 Mass of test samples
7 Determination of mass of test sample
9 8 Determination of volume of test sample — Method 1: Mercury method with vacuum
8.1 Principle
10 8.2 Apparatus
11 8.3 Determination of mass of empty vacuum pycnometer
12 8.4 Determination of mass of pycnometer filled with mercury
8.5 Determination of mass of pycnometer containing test sample and filled with mercury
8.6 Calculation of volume of test sample
13 9 Determination of volume of test sample — Method 2: Arrested water absorption method
9.1 Apparatus
9.1.4 Flat-weave cotton cloth
9.1.5 Burette magnifier
9.2 Determination of volume of test sample
9.3 Calculation of results
14 10 Determination of bulk density of test sample — Method 3: Vacuum method with spin dryer option
10.1 Principle
10.2 Apparatus and materials
15 10.3 Procedure
10.3.1 Determination of the mass of dry test piece (m 1)
10.3.2 Soaking of the test sample
16 10.3.3 Determination of the apparent mass of the immersed test sample (m 5) and the mass of the soaked test sample (m 3)
17 10.4 Calculation of results
10.4.1 Calculation of the volume of the test sample (V R)
10.4.2 Calculation of the bulk density of the test sample (ρ R)
18 10.5 Precision and bias
10.5.1 Interlaboratory data
10.5.2 Precision
19 10.5.3 Bias
11 Test report
20 Bibliography

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BS ISO 8840:2021
$102.76