EN 993-18:2002

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test samples
  6.1 Preparation of test samples
  6.2 Number of test samples
  6.3 Mass of test samples
7 Method
  7.1 Determination of the mass of dry test sample (m[1])
  7.2 Impregnation of the test sample
  7.3 Determination of the apparent mass of the immersed test
      sample (m[5]) and the mass of the impregnated test sample
      (m[3])
8 Calculation of results
  8.1 Calculation of the volume of the test sample (V[r])
  8.2 Calculation of the bulk density of the test sample (Roh[r])
9 Test report
Bibliography

This European standard specifies a method based on water absorption with vacuum for the determination of the bulk density of granular refractory materials (grain density) having a grain size larger than 2 mm. NOTE: This method is proposed as an alternative to the method based on mercury displacement with vacuum described in EN 993-17 which is to be used as the referee method because of its reproducibility. However, mercury is known to be a hazardous substance and the method in this EN is recommended for all routine purposes.