ASTM D2489-00
(Practice)Standard Practice for Estimating Degree of Particle Coating of Bituminous-Aggregate Mixtures
Standard Practice for Estimating Degree of Particle Coating of Bituminous-Aggregate Mixtures
SCOPE
1.1 This practice provides an estimate of the degree of particle coating in a bituminous-aggregate mixture on the basis of the percentage of coarse particles classified as being completely coated.
1.2 The values stated in SI units are regarded as being standard.
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.
General Information
Standards Content (Sample)
Designation: D 2489 – 00
Standard Practice for
Estimating Degree of Particle Coating of Bituminous-
1
Aggregate Mixtures
This standard is issued under the fixed designation D 2489; 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 * to establish the least mixing time required to produce satisfac-
tory coating for a given set of conditions.
1.1 This practice provides an estimate of the degree of
4.2 This procedure is used with hot-mixed, hot-laid bitumi-
particle coating in a bituminous-aggregate mixture on the basis
nous paving mixtures such as specified in Specification D 3515
of the percentage of coarse particles classified as being
or with cold-mixed, cold-laid bituminous paving mixtures such
completely coated.
as specified in Specification D 4215.
1.2 The values stated in SI units are regarded as being
4.3 It should be noted that even when a paving mixture
standard.
complies with the “percent of coated particles” that may be
1.3 This standard does not purport to address all of the
specified, this does not necessarily ensure that the asphalt
safety concerns, if any, associated with its use. It is the
cement is uniformly distributed throughout the paving mixture.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use.
3
5.1 Sieves, 9.5 mm ( ⁄8 in.) and 4.75 mm (No. 4). The sieves
2. Referenced Documents shall conform to Specification E 11.
5.2 Stopwatch, for checking actual mixing time of batch
2.1 ASTM Standards:
plants.
D 8 Terminology Relating to Materials for Roads and Pave-
2 5.3 Thermometer, range at least from 10°C (50°F) to 204°C
ments
2
(400°F).
D 979 Practice for Sampling Bituminous Paving Mixtures
5.4 Sample Shovel.
D 995 Specification for Mixing Plants for Hot-Mixed, Hot-
2
5.5 Sample Trays.
Laid Bituminous Paving Mixtures
D 3515 Specification for Hot-Mixed, Hot-Laid Bituminous
6. Sampling
2
Paving Mixtures
6.1 Batch Plant—Permit the plant to operate at an estab-
D 3665 Practice for Random Sampling of Construction
2 lished mixing time per batch (timed by a stopwatch).
Materials
6.2 Continuous Mix Plant—Establish a mixing time by use
D 4215 Specification for Cold-Mixed, Cold-Laid Bitumi-
2 of the following formula:
nous Paving Mixtures
E 11 Specification for Wire Cloth and Sieves for Testing mixing time 5 pug mill contents, kg ~lb!/pug mill output, kg/s ~lb/s!
3 (1)
Purposes
6.3 Drum Mix Plant—Operate the plant at a steady state
3. Terminology
condition for a period of time long enough to complete the
3.1 For definitions of terms, see Terminology D 8. sampling.
3.2 For descriptions of mixing plant terms, see Mixing
6.4 Samples should be taken at the site of the bituminous
Plants, Specification D 995. mixing plant immediately after discharge from the plant from
three truck loads selected at random in accordance with
4. Significance and Use
Practice D 3665 and sampled in accordance with Practice
4.1 The procedure in this practice for estimating the per-
D 979. Approximately 2.5 to 4.0 kg (5 to 8 lb) is required to
centage of coated particles after varying mixing times is used
perform the procedure.
6.5 If sampling truck loads is impractical, sample from the
roadway before compaction starts at three locations selected at
1
This practice is under the jurisdiction of ASTM Committee D04 on Road and
random in accordance with Practice D 3665 a
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