Interlaboratory Comparison of the Measurement of Retention Curves

The results of an interlaboratory comparison of the measurement of apparent density, solid density, open porosity and retention curves are presented. Baumberger sandstone and Sander sandstone were used as test materials. Repeatability standard deviation and reproducibility standard deviation for the measurement of apparent density, solid density, open porosity and retention curve moisture content have been estimated from the results of the interlaboratory com parison. The statistical analysis was made along the guidelines given in ISO 5725-2.