AASHTO T 166-21 Standard Method of Test for Bulk Specific Gravity （Gmb） of Compacted Asphalt Mixtures Using Saturated Surface-Dry Specimens.pdf

Standard Method of Test for Bulk Specific Gravity (Gmb)of Compacted Asphalt Mixtures Using Saturated Surface-Dry Specimens AASHTO Designation:T 166-21 Technically Revised:2021 Editorially Revised:2021 Technical Submittee:2c Asphalt-Aggregate Mixtures AASHIO American Association of State Highway and Transportation Officials 555 12th Street NW Suite 1000 Washington D.C.20004 Standard Method of Test for Bulk Specific Gravity (Gmb)of Compacted Asphalt Mixtures Using Saturated Surface-Dry Specimens AASHTO Designation:T 166-21 AASHIO Technically Revised:2021 Editorially Revised:2021 Technical Submittee:2c Asphalt-Aggregate Mixtures 1. SCOPE 1.1. This method of test covers the determination of bulk specific gravity (Gmb)of specimens of pacted asphalt mixtures. 1.2. This method should not be used with specimens that contain open or interconnecting voids or absorb more than 2.0 percent of water by volume as determined in Sections 7.2 or 10.2 herein.If the specimen contains open or interconnecting voids or absorbs more than 2.0 percent of water by volume then T 275 or T 331 should be used. 1.3. The bulk specific gravity (Gm)of the pacted asphalt mixture may be used in calculating the unit mass of the mixture. Note 1-The values for bulk specific gravity (Gm)obtained from T 275 or T 331 may differ. Care should be exercised when paring test results from T 275 and T 331. 1.4. The values stated in SI units are to be regarded as the standard. 1.5. This standard may involve hazardous materials operations and equipment.This standard does not purport to address all 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. 1.6. The quality of the results produced by this standard are dependent on the petence of the personnel performing the procedure and the capability calibration and maintenance of ...