ASTM D2728-98(2009)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2728 − 98(Reapproved 2009)
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 3.1.2.3 sand mix—a plant mix containing sand aggregate
and a high-viscosity grade of tar designed to be laid immedi-
1.1 This practice covers the selection and application tem-
ately.
peratures of road tar grades in the construction and mainte-
3.1.2.4 soil mix—a plant mix containing soil aggregate and
nance of pavements.
a low-to-medium viscosity grade of bituminous material,
1.2 The values stated in SI units are to be regarded as
usually designed to be stockpiled, then laid following a period
standard. No other units of measurement are included in this
of seasoning.
standard.
3.1.3 patch mix—a mixture of bituminous material and
mineral aggregate for patching holes, depressions, and dis-
2. Referenced Documents
tressed areas in existing pavements. These mixes are suitable
2.1 ASTM Standards:
for use in relatively small areas, applied at ambient
D8 Terminology Relating to Materials for Roads and Pave-
temperature, using hand-laying and hand-compaction tech-
ments
niques. These mixes may be designed for immediate use or for
stock-piling prior to use.
3. Terminology
3.1.4 sand aggregate—non-plastic mineral aggregate, es-
3.1 Definitions:The definitions of terms not included in sentially all passing the 4.75-mm sieve, and containing no
Terminology D8 are listed below. more than a minor percentage passing the 75-µm sieve.
3.1.1 dust palliative—a light application of a low-viscosity
4. Significance and Use
bituminous material for the express purpose of laying and
4.1 This practice provides information on the recommended
bonding dust or preventing a dust nuisance.
uses and application temperatures for the various grades of
3.1.2 plant mix—a mixture of bituminous material and
road tar used in the construction and maintenance of pave-
mineral aggregate prepared in a central bituminous mixing
ments.
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
3.1.2.2 hot lay tar concrete—a plant mix containing a high
availability, traffic, and environmental conditions applicable to
viscosity grade of tar and a densely graded mineral aggregate,
the specific project being considered.
designed to be laid at or near the elevated temperature of
mixing.
6. Recommended Application Temperatures
6.1 The temperature ranges listed in Table 1 for the se
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