Testing particulate materials

1)P Testing shall be carried out on representative samples of the particulate material. The mean value for each material property shall be determined making proper allowance for variations in secondary parameters such as composition, grading, moisture content, temperature, age, electrical charge due to handling and production method.

2)P The mean test values shall be adjusted by conversion factors to derive extreme values. The conversion factors shall be selected to allow for variability of the material properties over the silo life and for sampling inaccuracies.

3)P The conversion factors for a material property shall be adjusted if the effect of one of the secondary parameters accounts for more than 75 % of the margin introduced for the material property by the conversion factors.

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