ASTM D2728-98(2019)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2728 − 98 (Reapproved 2019)
Standard Practice for
Paving Uses and Application Temperatures for Road Tars
This standard is issued under the fixed designation D2728; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2.2 hot-lay tar concrete—a plant mix containing a high-
viscosity grade of tar and a densely graded mineral aggregate,
1.1 This practice covers the selection and application tem-
designed to be laid at or near the elevated temperature of
peratures of road tar grades in the construction and mainte-
mixing.
nance of pavements.
3.1.2.3 sand mix—a plant mix containing sand aggregate
1.2 The values stated in SI units are to be regarded as
and a high-viscosity grade of tar designed to be laid immedi-
standard. No other units of measurement are included in this
ately.
standard.
3.1.2.4 soil mix—a plant mix containing soil aggregate and
1.3 This international standard was developed in accor-
a low-to-medium viscosity grade of bituminous material,
dance with internationally recognized principles on standard-
usually designed to be stockpiled, then laid following a period
ization established in the Decision on Principles for the
of seasoning.
Development of International Standards, Guides and Recom-
3.1.3 patch mix—a mixture of bituminous material and
mendations issued by the World Trade Organization Technical
mineral aggregate for patching holes, depressions, and dis-
Barriers to Trade (TBT) Committee.
tressed areas in existing pavements. These mixes are suitable
2. Referenced Documents
for use in relatively small areas, applied at ambient
temperature, using hand-laying and hand-compaction tech-
2.1 ASTM Standards:
niques. These mixes may be designed for immediate use or for
D8 Terminology Relating to Materials for Roads and Pave-
stockpiling prior to use.
ments
3.1.4 sand aggregate—non-plastic mineral aggregate, es-
3. Terminology
sentially all passing the 4.75-mm sieve, and containing no
more than a minor percentage passing the 75-µm sieve.
3.1 Definitions: The definitions of terms not included in
Terminology D8 are listed below.
4. Significance and Use
3.1.1 dust palliative—a light application of a low-viscosity
4.1 This practice provides information on the recommended
bituminous material for the express purpose of laying and
bonding dust or preventing a dust nuisance. uses and application temperatures for the various grades of
road tar used in the construction and maintenance of pave-
3.1.2 plant mix—a mixture of bituminous material and
ments.
mineral aggregate prepared in a central bituminous mixing
plant, then spread and compacted at the job site. Plant mixes
5. Recommended Uses
include:
5.1 The recommendations shown in Table 1 are for use only
3.1.2.1 cold-lay tar concrete—a plant mix containing a
as a guide when using tar for pavement construction and
medium-viscosity grade of tar and a less densely graded
maintenance. Several grades of tar may be listed in the table for
aggregate designed to be laid either shortly after mixing or
the same general construction procedure. Selection of a par-
when the mixture is at or near ambient temperature.
ticular grade will depend upon local practice, equipment
availability, traffic, and environmental conditions applicable to
the specific project b
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