AASHTO R 79

Abstract

Scope: This standard practice covers the process of drying compacted field and laboratory specimens using a vacuum apparatus. The values stated in SI units are to be regarded as the standard.  The specimens dried by this practice remain at close to room temperature, which helps in maintaining specimen integrity during the drying process and allows the operators to run repeated tests on the same sample, if necessary.  This standard can also be used for drying other construction materials such as concrete, soils, aggregates, and loose asphalt mixtures. Use recommendations provided from the manufacturer for drying other construction materials.  This standard practice may involve hazardous materials, operations, and equipment. 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.