ASTM D5624-02(2007)

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Designation:D5624–00 Designation: D 5624 – 02 (Reapproved 2007)
Standard Test Method for
Determining the Transverse-Aggregate Spread Rate for
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
1.1This test method details the procedure for calibrating the transverse-aggregate spread rates in 0.3–m (1–ft) increments.
1.2
1.1 This test method details the procedure for determining the aggregate spread rates in approximately 0.33-m (1-ft) transverse
increments.
1.2 The values stated in SI units are to be regarded as standard. The inch-pound units shown in parentheses are for information
only.
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.
2. Referenced Documents
2.1 ASTM Standards:
C 566 Test Method for Total Evaporable Moisture Content of Aggregate by Drying
C 136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
E 898 Test Method of Testing Top-Loading, Direct-Reading Laboratory Scales and Balances
3. Summary of Test Method
3.1 The transverse-aggregate spread rate is determined by the use of a series of rubber pads laid side by side width-wise across
the pavement. The chip spreader is then allowed to proceed across the rubber mats with the gates open allowing the aggregate to
drop onto the mats. Aggregate collected on each of the mats is removed and weighed. The transverse-aggregate distribution can
then beis calculated, and the chipaggregate spreader adjusted if desired. Moisture content and aggregate gradation can be
determined from the collected material.
4. Significance and Use
4.1This test method can be used to calibrate aggregate spreaders prior to construction.
4.2Quality control during construction can be monitored.
4.3Moisture content and sieve analysis of the aggregates at the time of construction can also be obtained.
4.1 The results from this test method are used to calibrate aggregate spreaders and verify the uniformity of distribution
transversely prior to construction of the surface treatment by determining the average quantity of aggregate spread per unit area.
4.2 The test method is useful for quality control during construction to monitor the spread rate.
4.3 The samples obtained during construction by this test method are useful for determination of moisture content and grading
when such information is required.
5. Apparatus
5.1 Balance—A balance (or scale) of sufficient capacity to handle the weightmass of the aggregate shall be provided. This
balance (or scale) shall be readable and accurate to1gif only the transverse spread rate is being determined; an accuracy of 0.1
g is needed if moisture content is being determined.All balances, or scales, shall meet the requirement set forth in Method E 898
for top loading, direct-reading laboratory scales and balances.
ThistestmethodisunderthejurisdictionofASTMCommitteeD04onRoadandPavingMaterialsandisthedirectresponsibilityofSubcommitteeD04.24onBituminous
Surface Treatments.
Current edition approved July 10, 2000. Published September 2000. Originally published as D 5624–94. Last previous edition D 5624–94.
Current edition approved Dec. 1, 2007. Published January 2008. Originally approved in 1994. Last previous edition approved in 2002 as D 5624 – 02.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
, Vol 04.02.volume information, refer to the standard’s Document Summary page on the ASTM website.
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D 5624 – 02 (2007)
5.2 Containers—Any container of a sufficient size to hold the contents of one rubber mat. If moisture content is to be
determined, then the container should be sealable. —Containers, sufficient in number for the number of samples to be taken, and
of a sufficient size to hold the contents of one rubber mat. If moisture content is to be determined, then the container shall be
sealable.
5.3 Rubber Mats— Rubber mats shouldshall have grooves of sufficient depth to prevent aggregate from rolling and slipping
whenthechipsarespread.Thematsshouldshallbecutinwidthsappropriateforthegateopeningsoftheequipmentbeingadjusted.
Widths of 0.305 m (1 ft) have been commonly used. The length of the mats shouldshall be a minimum of 0.9144 m (3 ft). Mats
shouldshall 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 available at local hardware stores. Various sizes can be accommodated and both
Englishinch—pound and SI units can be handled.
5.4 Oven—The oven shall be a forced air type oven capable of maintaining a uniform temperature of 110 6 5°C (230 6 9°F).
PROCEDURES
6. Determination of Transverse Spread Rate
6.1 Place the rubber mats side by side width-wise on the pavement with the grooves perpendicular to the centerline (Fig. 1).
The number of rubber mats to be used shall be equal to the width of aggregate distribution to be monitored.
6.2 Tare one container for eac
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