ASTM D2728-98

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact
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Designation: D 2728 – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
1
Paving Uses and Application Temperatures for Road Tars
This standard is issued under the fixed designation D 2728; 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 3.1.3.4 soil mix—a plant mix containing soil aggregate and
a low-to-medium viscosity grade of bituminous material,
1.1 This practice covers the selection and application tem-
usually designed to be stockpiled, then laid following a period
peratures of road tar grades in the construction and mainte-
of seasoning.
nance of pavements.
3.1.4 patch mix—a mixture of bituminous material and
2. Referenced Documents
mineral aggregate for patching holes, depressions, and dis-
tressed areas in existing pavements. These mixes are suitable
2.1 ASTM Standards:
for use in relatively small areas, applied at ambient tempera-
D 8 Standard Terminology Relating to Materials for Roads
2
ture, using hand-laying and hand-compaction techniques.
and Pavements
These mixes may be designed for immediate use or for
3. Terminology
stock-piling prior to use.
3.1 The definitions of terms not included in Standard D 8
4. Significance and Use
are listed below.
4.1 This practice provides information on the recommended
3.1.1 dust palliative—a light application of a low-viscosity
uses and application temperatures for the various grades of
bituminous material for the express purpose of laying and
road tar used in the construction and maintenance of pave-
bonding dust or preventing a dust nuisance.
ments.
3.1.2 sand aggregate—non-plastic mineral aggregate, es-
sentially all passing the 4.75-mm sieve, and containing no
5. Recommended Uses
more than a minor percentage passing the 75-μm sieve.
5.1 The recommendations shown in Table 1 are for use only
3.1.3 plant mix—a mixture of bituminous material and
as a guide when using tar for pavement construction and
mineral aggregate prepared in a central bituminous mixing
maintenance. Several grades of tar may be listed in the table for
plant, then spread and compacted at the job site. Plant mixes
the same general construction procedure. Selection of a par-
include:
ticular grade will depend upon local practice, equipment
3.1.3.1 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
3.1.3.2 cold lay tar concrete—a plant mix containing a
6.1 The temperature ran
...