ASTM D2872-12
(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
4.1 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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Designation: D2872 − 12
StandardTest Method for
Effect of Heat and Air on a Moving Film of Asphalt (Rolling
1
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
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.
5. Apparatus
2. Referenced Documents
2 5.1 Oven—This shall be a double-walled electrically heated
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),
D2171 Test Method for Viscosity of Asphalts by Vacuum
1 1
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
3.1 Amoving film of asphaltic material is heated in an oven
bottom vents shall be located symmetrically to supply incom-
for 85 min at 325°F (163°C). The effects of heat and air are
ing air around the heating elements. They shall have an open
2 2
determined from changes in physical test values as measured
area of 2.31 6 0.11 in. (15.0 6 0.7 cm ). The top vents shall
before and after the oven treatment. An optional procedure is
be symmetrically arranged in the upper part of the oven and
2 2
provided for determining the change in sample mass.
have an open area of 1.45 6 0.07 in. (9.3 6 0.45 cm ).
5.1.2 The oven shall have an air plenum covering the side
1
wallsandceiling.Theairspaceshallbe1 ⁄2in.(38.1mm)deep
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
from the walls and ceiling. At a midpoint in the width of the
and Paving Materials and is the direct responsibility of Subcommittee D04.46 on
oven, and 6 in. (152.4 mm) from the face of the circular metal
Durability and Distillation Tests.
1
carriage to its axis, a squirrel cage-type fan 5 ⁄4 in. (133 mm)
Current edition approved Aug. 1, 2012. Published August 2012. Originally
7
OD by 2 ⁄8 in. (73 mm) wide shall be turned at 1725 rpm by an
approved in 1970. Last previous edition approved in 2004 as D2872 – 04. DOI:
10.1520/D2872–12
externally mounted motor. The squirrel cage fan shall be set so
2
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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Unite
...
Designation: D2872 − 04 D2872 − 12
Standard Test Method for
Effect of Heat and Air on a Moving Film of Asphalt (Rolling
1
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
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D113 Test Method for Ductility of Bituminous Materials
D2171 Test Method for Viscosity of Asphalts by Vacuum Capillary Viscometer
E1 Specification for ASTM Liquid-in-Glass Thermometers
E644 Test Methods for Testing Industrial Resistance Thermometers
E1137/E1137M Specification for Industrial Platinum Resistance Thermometers
3. Summary of Test Method
3.1 A moving film of asphaltic material is heated in an oven for 85 min at 325°F (163°C). The effects of heat and air are
determined from changes in physical test values as measured before and after the oven treatment. An optional procedure is
provided for determining the change in sample mass.
3.2 Precision values for this test method have been developed for viscosity at 140°F (60°C); ductility at 60°F (15.6°C); and mass
change.
4. Significance and Use
4.1 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.
5. Apparatus
5.1 Oven—This shall be a double-walled electrically heated convection-type oven. Its inside dimensions shall be 15 in. (381
1 1
mm) high, 19 in. (483 mm) wide (including the plenum), and 17 ⁄2 6 ⁄2 in. (445 6 13 mm) deep (with the door closed). The door
shall contain a symmetrically located window with dimensions of 12 to 13 in. (305 to 330 mm) wide by 8 to 9 in. (203 to 229
mm) high. The window shall contain two sheets of heat-resistant glass separated by an air space. The window should permit an
1
unobstructed view of the interior of the oven. The top of the upper heating element shall be 1 6 ⁄8 in. (25 6 3 mm) below the
oven floor.
5.1.1 The oven shall be vented at the top and bottom. The bottom vents shall be located symmetrically to supply incoming air
2 2
around the heating elements. They shall have an open area of 2.31 6 0.11 in. (15.0 6 0.7 cm ). The top vents shall be
2 2
symmetrically arranged in the upper part of the oven and have an open area of 1.45 6 0.07 in. (9.3 6 0.45 cm ).
1
5.1.2 The oven shall have an air plenum covering the side walls and ceiling. The air space shall be 1 ⁄2 in. (38.1 mm) deep from
the walls and ceiling. At a midpoint in the width of the oven, and 6 in. (152.4 mm) from the face of the circular metal carriage
1 7
to its axis, a squirrel cage-type fan 5 ⁄4 in. (133 mm) OD by 2 ⁄8 in. (73 mm) wide shall be turned at 1725 rpm by an externally
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D2872 − 12
mounted motor. The squirrel cage fan shall be set so that the fan turns in an opposite direction to its vanes. The air flow
characteristics of the fan-plenum system shall be suction from the floor of the oven through the wall plenums and exhaust of the
air through the fan. Fig. 1 and Fig. 2 show details of this plenum system.
5.1.3 The oven shall be equipped with a proportional control thermostat capable of maintaining a temperature of 325°F (163°C)
to within 61.0°F (60.5°C). The sensing element of the thermostat may be placed at any location that enables the oven to maintain
temperature control as specified by this standard.
5.1.4 The thermometer shall be hung or affixed to a mounting in the ceiling which is 2 in. (50.8 mm) from the right side of the
oven at a midpoint in the depth of the oven. The thermometer shall hang down into the oven so that the bulb of the thermometer
is within 1 in. of an im
...
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