ASTM D5624-02

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Designation:D5624–02
Standard Test Method for
Determining the Transverse-Aggregate Spread Rate for
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Surface Treatment Applications
This standard is issued under the fixed designation D 5624; 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 4. Significance and Use
1.1 This test method details the procedure for determining 4.1 The results from this test method are used to calibrate
the aggregate spread rates in approximately 0.33-m (1-ft) aggregate spreaders and verify the uniformity of distribution
transverse increments. transversely prior to construction of the surface treatment by
1.2 The values stated in SI units are to be regarded as determining the average quantity of aggregate spread per unit
standard. The inch-pound units shown in parentheses are for area.
information only. 4.2 The test method is useful for quality control during
1.3 This standard does not purport to address all of the construction to monitor the spread rate.
safety concerns, if any, associated with its use. It is the 4.3 The samples obtained during construction by this test
responsibility of the user of this standard to establish appro- method are useful for determination of moisture content and
priate safety and health practices and determine the applica- grading when such information is required.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Balance—A balance (or scale) of sufficient capacity to
2.1 ASTM Standards: handle the mass of the aggregate shall be provided. This
C 566 TestMethodforTotalMoistureContentofAggregate balance (or scale) shall be readable and accurate to1gif only
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by Drying the transverse spread rate is being determined; an accuracy of
C 136 Test Method for Sieve Analysis of Fine and Coarse 0.1 g is needed if moisture content is being determined. All
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Aggregates balances, or scales, shall meet the requirement set forth in
E 898 Method of Testing Top Loading, Direct-Reading Method E 898 for top loading, direct-reading laboratory scales
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Laboratory Scales and Balances and balances.
5.2 Containers—Containers, sufficient in number for the
3. Summary of Test Method
number of samples to be taken, and of a sufficient size to hold
3.1 The transverse-aggregate spread rate is determined by the contents of one rubber mat. If moisture content is to be
the use of a series of rubber pads laid side by side width-wise
determined, then the container shall be sealable.
across the pavement. The chip spreader is then allowed to 5.3 Rubber Mats—Rubber mats shall have grooves of
proceed across the rubber mats with the gates open allowing
sufficient depth to prevent aggregate from rolling and slipping
the aggregate to drop onto the mats. Aggregate collected on when the chips are spread. The mats shall be cut in widths
each of the mats is removed and weighed. The transverse-
appropriate for the gate openings of the equipment being
aggregate distribution then is calculated, and the aggregate adjusted. Widths of 0.305 m (1 ft) have been commonly used.
spreader adjusted if desired. Moisture content and aggregate
The length of the mats shall be a minimum of 0.9144 m (3 ft).
gradation can be determined from the collected material. Mats shall be cut so that the grooves are perpendicular to the
0.9144 m (3 ft) side.
NOTE 1—Rubber floor mats conforming to these specifications are
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This test method is under the jurisdiction of ASTM Committee D04 on Road
availableatlocalhardwarestores.Varioussizescanbeaccommodatedand
and Paving Materials and is the direct responsibility of Subcommittee D04.24 on
both inch—pound and SI units can be handled.
Bituminous Surface Treatments.
Current edition approved Feb. 10, 2002. Published April 2002. Originally
5.4 Oven—The oven shall be a forced air type oven capable
published as D 5624–94. Last previous edition D 5624–00.
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of maintaining a uniform temperature of 110 6 5°C (230 6
Annual Book of ASTM Standards, Vol 04.02.
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Annual Book of ASTM Standards, Vol 14.02. 9°F).
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D5624
PROCEDURES 8. Aggregate Gradation (Optional)
8.1 Combine the aggregate from all individual containers
6. Determination of Transverse Spread Rate
into one container. Mix aggregate through riffle splitter at least
6.1 Place the rubber mats side by side width-wise on the twice to ensure adequate mixing.
8.2 Oven dry to a constant mass.
pavementwiththegroovesperpendiculartothecenterline(Fig.
1). The number of rub
...