ASTM D2872-12e1

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Designation: D2872 − 12
Standard Test 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.
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ε NOTE—This standard was corrected editorially in February 2013.
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
1.3 This standard does not purport to address all of the
asphalt condition as incorporated in the pavement. If the
safety concerns, if any, associated with its use. It is the
mixing temperature differs appreciably from the 302°F
responsibility of the user of this standard to establish appro-
(150°C) level, more or less effect on properties will occur.This
priate safety and health practices and determine the applica-
test method also can be used to determine mass change, which
bility of regulatory limitations prior to use.
is a measure of asphalt volatility.
2. Referenced Documents
5. Apparatus
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2.1 ASTM Standards:
5.1 Oven—This shall be a double-walled electrically heated
D113 Test Method for Ductility of Bituminous Materials
convection-type oven. Its inside dimensions shall be 15 in.
D2171 Test Method for Viscosity of Asphalts by Vacuum
(381 mm) high, 19 in. (483 mm) wide (including the plenum),
Capillary Viscometer
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and 17 ⁄2 6 ⁄2 in. (445 6 13 mm) deep (with the door closed).
E1 Specification for ASTM Liquid-in-Glass Thermometers
The door shall contain a symmetrically located window with
E644 Test Methods for Testing Industrial Resistance Ther-
dimensions of 12 to 13 in. (305 to 330 mm) wide by 8 to 9 in.
mometers
(203 to 229 mm) high.The window shall contain two sheets of
E1137/E1137M Specification for Industrial Platinum Resis-
heat-resistant glass separated by an air space. The window
tance Thermometers
should permit an unobstructed view of the interior of the oven.
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The top of the upper heating element shall be 1 6 ⁄8 in. (25 6
3. Summary of Test Method
3 mm) below the oven floor.
3.1 Amoving film of asphaltic material is heated in an oven
5.1.1 The oven shall be vented at the top and bottom. The
for 85 min at 325°F (163°C). The effects of heat and air are
bottom vents shall be located symmetrically to supply incom-
determined from changes in physical test values as measured
ing air around the heating elements. They shall have an open
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before and after the oven treatment. An optional procedure is
area of 2.31 6 0.11 in. (15.0 6 0.7 cm ). The top vents shall
provided for determining the change in sample mass.
be symmetrically arranged in the upper part of the oven and
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have an open area of 1.45 6 0.07 in. (9.3 6 0.45 cm ).
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This test method is under the jurisdiction of ASTM Committee D04 on Road
5.1.2 The oven shall have an air plenum covering the side
and Paving Materials and is the direct responsibility of Subcommittee D04.46 on
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wallsandceiling.Theairspaceshallbe1 ⁄2in.(38.1mm)deep
Durability and Distillation Tests.
from the walls and ceiling. At a midpoint in the width of the
Current edition approved Aug. 1, 2012. Published August 2012. Originally
oven, and 6 in. (152.4 mm) from the face of the circular metal
approved in 1970. Last previous edition approved in 2004 as D2872 – 04. DOI:
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10.1520/D2872–12E01.
carriage to its axis, a squirrel cage-type fan 5 ⁄4 in. (133 mm)
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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OD by 2 ⁄8 in. (73 mm) wide shall be turned at 1725 rpm by an
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
externally mounted motor. The squirrel cage fan shall be set so
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. that the fan turns in an opposite direction to its vanes. The air
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