【国外标准】 Standard Test Method for Density of Semi-Solid and Solid Asphalt Materials (Nickel Crucible Method)

5.1 Values of density are used for converting volumes to units of mass, and for correcting measured volumes from the temperature of measurement to a standard temperature using Practice D4311/D4311M.1.1 This test method covers the determination of the density of semi-solid and solid asphalt materials by weighing in air and in water.NOTE 1: An alternate method for determining the density of semi-solid and solid asphalt materials is Test Method D70/D70M. For materials which are too fluid for use of this method, use Test Method D3142/D3142M.1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.1.3 Warning— Mercury has been designated by the United States Environmental Protection Agency (EPA) and many state agencies as a hazardous material that can cause central nervous system, kidney, and liver damage. Mercury or its vapor may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for details and EPA’s website—www.epa.gov/mercury/faq.htm—for additional information. Users should be aware that selling mercury, mercury-containing products, or both, in your state may be prohibited by state law.1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.