Standard Test Methods for
Asphalt Content of Bituminous Mixtures by the Nuclear
Method1
This standard is issued under the fixed designation D 4125; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 These test methods cover the procedures for determining the asphalt content of samples of uncompacted bituminous
mixtures (Test Method A), and of laboratory compacted
specimens of bituminous mixtures (Test Method B) by examining a test sample with an apparatus that utilizes neutron
thermalization techniques.
1.2 The values expressed in SI units are regarded as the
standard. The inch-pounds equivalents may be approximate.
1.3 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. See Section 6 and
Note 1, Note 4, and Note 6, for specific hazards.
2. Referenced Documents
2.1 ASTM Standards:
C 670 Practice for Preparing Precision and Bias Statements
for Test Methods of Construction Materials2
D 75 Practice for Sampling Aggregates3
D 140 Practice for Sampling Bituminous Materials3
D 979 Practice for Sampling Bituminous Paving Mixtures3
D 1461 Test Method for Moisture or Volatile Distillates in
Bituminous Paving Mixtures3
D 1559 Test Method for Resistance to Plastic Flow of
Bituminous Mixtures Using Marshall Apparatus3
D 1561 Practice for Preparation of Bituminous Mixture Test
Specimens by Means of California Kneading Compactor3
D 3387 Test Method for Compaction and Shear Properties
of Bituminous Mixtures by Means of the U.S. Corps of
Engineers Gyratory Testing Machine (GTM)3
D 4013 Practice for Preparation of Test Specimens of Bituminous Mixtures by Means of Gyratory Shear Compactor3
3. Significance and Use
3.1 These test methods are useful as a rapid, nondestructive
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