ASTM D3319-06
(Practice)Standard Practice for Accelerated Polishing of Aggregates Using the British Wheel
Standard Practice for Accelerated Polishing of Aggregates Using the British Wheel
SIGNIFICANCE AND USE
This practice simulates the polishing action of vehicular traffic on coarse aggregates used in bituminous pavements.
A polish value is determined that may be used to rate or classify coarse aggregates for their ability to resist polishing under traffic.
SCOPE
1.1 This practice covers a laboratory procedure by which an estimate may be made of the extent to which different coarse aggregates may polish.
1.2 The values stated in inch-pound units are to be regarded as the standard.
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.
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Designation:D3319–06
Standard Practice for the
Accelerated Polishing of Aggregates Using the British
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Wheel
This standard is issued under the fixed designation D3319; 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 3.1.3 residual polish value, (RPV-n)—the residual polish
value is obtained when a constant PV-n is acheived four
1.1 This practice covers a laboratory procedure by which an
consecutive times with repeated swings of the pendulum.
estimate may be made of the extent to which different coarse
aggregates may polish.
4. Significance and Use
1.2 The values stated in inch-pound units are to be regarded
4.1 This practice simulates the polishing action of vehicular
as the standard.
traffic on coarse aggregates used in bituminous pavements.
1.3 This standard does not purport to address all of the
4.2 Apolish value is determined that may be used to rate or
safety concerns, if any, associated with its use. It is the
classify coarse aggregates for their ability to resist polishing
responsibility of the user of this standard to establish appro-
under traffic.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Apparatus
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2. Referenced Documents 5.1 Accelerated Polishing Machine —An accelerated pol-
2 ishing machine, also known as the British Wheel, and based
2.1 ASTM Standards:
upon a 1958 design by the Road Research Laboratory of Great
C778 Specification for Standard Sand
Britain. This machine shall be mounted on a firm, rigid, and
D75 Practice for Sampling Aggregates
level base. The equipment shall include the following:
D1415 Test Method for Rubber Property—International
5.1.1 Cylindrical Wheel—Hereafter referred to as the road
Hardness
wheel, and having a flat-surface periphery and of such size and
E303 Test Method for Measuring Surface Frictional Prop-
shape as to permit 14 specimens described below to be
erties Using the British Pendulum Tester
clamped onto the periphery to form a continuous surface of
E501 Specification for Rib Tire for Pavement Skid-
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aggregate particles, 1 ⁄4 in. (44.45 mm) wide and 16 in. (406.4
Resistance Tests
mm) in diameter.
3. Terminology 5.1.2 Ameans of rotating the road wheel about its own axis
at a speed of 320 6 5 rpm.
3.1 Definitions:
5.1.3 A means of bringing the surface of a rubber-tired
3.1.1 initial friction value (PV-i)—the initial British Pendu-
wheel 8 in. (203.2 mm) in diameter and 2 in. (50.8 mm) wide
lum Tester readings on the test specimens before they are
to bear on the aggregate specimens mounted on the surface of
polished in the accelerated polishing machine.
the road wheel with a total load of 88 6 1 lbf (391.44 6 4.45
3.1.2 polish value (PV-n)—a measure of the state of polish
N). The tire shall be treated, if necessary, to obtain a true
reached by a test specimen subjected to the specified hours (n)
running surface. The tire shall be free to rotate about its own
of accelerated polishing using the materials, equipment, and
axis,whichshouldbeparalleltotheaxisoftheroadwheel.The
proceduresdescribedinthismethod.Themeasurementismade
plane of rotation of the tire shall coincide with that of the road
using the British Pendulum Tester as described in 5.3 and Test
wheel. Before a new tire is used on a test, it shall be
Method E303.
conditioned by a preliminary run of 6 h with a 150-grit silicon
carbide using dummy specimens (extra or used) on the road
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This practice is under the jurisdiction of ASTM Committee D04 on Road and
wheel.
Paving Materials and is the direct responsibility of Subcommittee D04.51 on
Aggregate Tests.
Current edition approved July 1, 2006. Published July 2006. Originally approved
in 1974. Last previous edition approved in 2000 as D3319 – 00. DOI: 10.1520/
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D3319-06. Available from Wessex Engineering and Metal Craft Co., Ltd., Merchants
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D3319–06
5.1.3.1 Alternate Tire No. 1—An industrial 8 by 2
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