ASTM D2872-04
(Test Method)Standard Test Method for Effect of Heat and Air on a Moving Film of Asphalt (Rolling Thin-Film Oven Test)
Standard Test Method for Effect of Heat and Air on a Moving Film of Asphalt (Rolling Thin-Film Oven Test)
SIGNIFICANCE AND USE
This test method indicates approximate change in properties of asphalt during conventional hot-mixing at about 302°F (150°C) as indicated by viscosity and other rheological measurements. It yields a residue which approximates the asphalt condition as incorporated in the pavement. If the mixing temperature differs appreciably from the 302°F (150°C) level, more or less effect on properties will occur. This test method also can be used to determine mass change, which is a measure of asphalt volatility.
SCOPE
1.1 This test method is intended to measure the effect of heat and air on a moving film of semi-solid asphaltic materials. The effects of this treatment are determined from measurements of the selected properties of the asphalt before and after the test.
1.2 The values stated in inch-pound units are to be regarded as the standard.
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.
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Standards Content (Sample)
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Designation: D2872 − 04
StandardTest Method for
Effect of Heat and Air on a Moving Film of Asphalt (Rolling
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Thin-Film Oven Test)
This standard is issued under the fixed designation D2872; 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 3.2 Precision values for this test method have been devel-
oped for viscosity at 140°F (60°C); ductility at 60°F (15.6°C);
1.1 This test method is intended to measure the effect of
and mass change.
heat and air on a moving film of semi-solid asphaltic materials.
The effects of this treatment are determined from measure-
4. Significance and Use
ments of the selected properties of the asphalt before and after
4.1 This test method indicates approximate change in prop-
the test.
erties of asphalt during conventional hot-mixing at about
1.2 The values stated in inch-pound units are to be regarded
302°F (150°C) as indicated by viscosity and other rheological
as the standard.
measurements. It yields a residue which approximates the
asphalt condition as incorporated in the pavement. If the
1.3 This standard does not purport to address all of the
mixing temperature differs appreciably from the 302°F
safety concerns, if any, associated with its use. It is the
(150°C) level, more or less effect on properties will occur.This
responsibility of the user of this standard to establish appro-
test method also can be used to determine mass change, which
priate safety and health practices and determine the applica-
is a measure of asphalt volatility.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Oven—This shall be a double-walled electrically heated
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2.1 ASTM Standards:
convection-type oven. Its inside dimensions shall be 15 in.
D113 Test Method for Ductility of Bituminous Materials
(381 mm) high, 19 in. (483 mm) wide (including the plenum),
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D2171 Test Method for Viscosity of Asphalts by Vacuum
and 17 ⁄2 6 ⁄2 in. (445 6 13 mm) deep (with the door closed).
Capillary Viscometer
The door shall contain a symmetrically located window with
E1 Specification for ASTM Liquid-in-Glass Thermometers
dimensions of 12 to 13 in. (305 to 330 mm) wide by 8 to 9 in.
E644 Test Methods for Testing Industrial Resistance Ther-
(203 to 229 mm) high.The window shall contain two sheets of
mometers
heat-resistant glass separated by an air space. The window
E1137/E1137M Specification for Industrial Platinum Resis-
should permit an unobstructed view of the interior of the oven.
tance Thermometers 1
The top of the upper heating element shall be 1 6 ⁄8 in. (25 6
3 mm) below the oven floor.
3. Summary of Test Method
5.1.1 The oven shall be vented at the top and bottom. The
bottom vents shall be located symmetrically to supply incom-
3.1 Amoving film of asphaltic material is heated in an oven
ing air around the heating elements. They shall have an open
for 85 min at 325°F (163°C). The effects of heat and air are
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area of 2.31 6 0.11 in. (15.0 6 0.7 cm ). The top vents shall
determined from changes in physical test values as measured
be symmetrically arranged in the upper part of the oven and
before and after the oven treatment. An optional procedure is
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have an open area of 1.45 6 0.07 in. (9.3 6 0.45 cm ).
provided for determining the change in sample mass.
5.1.2 The oven shall have an air plenum covering the side
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wallsandceiling.Theairspaceshallbe1 ⁄2in.(38.1mm)deep
from the walls and ceiling. At a midpoint in the width of the
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This test method is under the jurisdiction of ASTM Committee D04 on Road
oven, and 6 in. (152.4 mm) from the face of the circular metal
and Paving Materials and is the direct responsibility of Subcommittee D04.46 on
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carriage to its axis, a squirrel cage-type fan 5 ⁄4 in. (133 mm)
Durability and Distillation Tests.
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OD by 2 ⁄8 in. (73 mm) wide shall be turned at 1725 rpm by an
Current edition approved June 1, 2004. Published September 2004. Originally
approved in 1970. Last previous edition approved in 1997 as D2872 – 97.
externally mounted motor. The squirrel cage fan shall be set so
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
that the fan turns in an opposite direction to its vanes. The air
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
flow characteristics of the fan-plenum system shall be suction
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. from the floor of the oven through the wall plenums and
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