【国外标准】 Standard Test Method for Air Drying RDF-5 for Further Analysis (Withdrawn 2009)

Air drying is performed on a gross sample if it cannot be handled without loss of moisture. A laboratory sample is air dried in order to yield a RDF-5 sample with moisture content near to equilibrium with the atmosphere. Such equilibrium is necessary to ensure uniform conditions throughout subsequent analysis of the RDF-5 laboratory sample for density, size distribution, hydrophilia, breakage, and similar tests. The test is not applicable if the sample is to be tested for total moisture.1.1 This test method covers the process of air drying a gross or laboratory sample of RDF-5. The air dry loss is determined by air drying on a drying floor.1.2 The values given in SI units are to be regarded as the standard. The values in parentheses are for information only.This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Section .