ASTM D3791/D3791M-04(2011)e1
(Practice)Standard Practice for Evaluating the Effects of Heat on Asphalts
Standard Practice for Evaluating the Effects of Heat on Asphalts
SIGNIFICANCE AND USE
When asphalts are maintained at elevated temperatures in the presence of air, their characteristics may change. Certain blown asphalts also soften when maintained near, and particularly above, their final blowing temperatures under virtually air-free conditions. This may happen if the asphalt is overheated for application purposes. This practice provides a uniform heat-treatment procedure and methods for evaluating the effect of this treatment on some of the characteristics of asphalts. Changes observed when asphalts are overheated are not indicative of changes to be expected when asphalts are heated to normal application temperatures.
SCOPE
1.1 This practice covers a procedure for evaluating some of the effects on asphalts of heating in the presence of little or no air.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with 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: D3791/D3791M – 04 (Reapproved 2011)
Standard Practice for
Evaluating the Effects of Heat on Asphalts
This standard is issued under the fixed designation D3791/D3791M; 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.
´ NOTE—Units information was editorially revised in June 2011.
1. Scope E145 Specification for Gravity-Convection and Forced-
Ventilation Ovens
1.1 This practice covers a procedure for evaluating some of
the effects on asphalts of heating in the presence of little or no
3. Terminology
air.
3.1 Definitions—Definitions of terms used in this practice
1.2 The values stated in either SI units or inch-pound units
can be found in Terminology D1079.
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
4. Summary of Practice
system shall be used independently of the other. Combining
4.1 A sample of asphalt in a loosely covered container is
values from the two systems may result in non-conformance
heated to a temperature chosen by the investigator for a period
with the standard.
of5h 610min.Certaincharacteristicsoftheasphaltafterheat
1.3 This standard does not purport to address all of the
exposureatthetesttemperaturechosenarethencomparedwith
safety concerns, if any, associated with its use. It is the
those characteristics before exposure.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
NOTE 1—Asettemperatureisrequiredwhenthispracticeisusedaspart
of a specification. Historically, a temperature of 204°C [400°F] has been
bility of regulatory limitations prior to use.
used.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 When asphalts are maintained at elevated temperatures
D5 Test Method for Penetration of Bituminous Materials
inthepresenceofair,theircharacteristicsmaychange.Certain
D36 Test Method for Softening Point of Bitumen (Ring-
blown asphalts also soften when maintained near, and particu-
and-Ball Apparatus)
larly above, their final blowing temperatures under virtually
D140 Practice for Sampling Bituminous Materials
air-free conditions. This may happen if the asphalt is over-
D1079 TerminologyRelatingtoRoofingandWaterproofing
heated for application purposes. This practice provides a
D2170 Test Method for Kinematic Viscosity of Asphalts
uniform heat-treatment procedure and methods for evaluating
(Bitumens)
the effect of this treatment on some of the characteristics of
D2171 Test Method for Viscosity of Asphalts by Vacuum
asphalts. Changes observed when asphalts are overheated are
Capillary Viscometer
not indicative of changes to be expected when asphalts are
D4402 Test Method for Viscosity Determination ofAsphalt
heated to normal application temperatures.
at Elevated Temperatures Using a Rotational Viscometer
E1 Specification for ASTM Liquid-in-Glass Thermometers
6. Apparatus
6.1 Oven—A forced-ventilation oven conforming to the
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
requirements forType IIAas prescribed in Specification E145,
WaterproofingandisthedirectresponsibilityofSubcommitteeD08.03onSurfacing
capable of maintaining temperatures up to 300°C [572°F], and
and Bituminous Materials for Membrane Waterproofing and Built-up Roofing.
with a chamber at least 300 by 300 by 300 mm [12 by 12 by
Current edition approved May 1, 2011. Published June 2011. Originally
12 in.].
approved in 1979. Last previous edition approved in 2004 as D3791–04. DOI:
10.1520/D3791_D3791M–04R11E01.
6.2 Thermometer—ASTM Low-Distillation Thermometer,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
having a range from −1 to+300°C [30 to 580°F] and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
conforming to the requirements forThermometers 7C or 7F as
Standards volume information, refer to the standard’s Document Summary page on
the A
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:D3791–04 Designation: D3791/D3791M – 04 (Reapproved 2011)
Standard Practice for
Evaluating the Effects of Heat on Asphalts
This standard is issued under the fixed designation D3791/D3791M; 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.
´ NOTE—Units information was editorially revised in June 2011.
1. Scope
1.1 This practice covers a procedure for evaluating some of the effects on asphalts of heating in the presence of little or no air.
1.2
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with 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
2.1 ASTM Standards:
D5 Test Method for Penetration of Bituminous Materials
D36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)
D140 Practice for Sampling Bituminous Materials
D1079 Terminology Relating to Roofing and Waterproofing
D2170 Test Method for Kinematic Viscosity of Asphalts (Bitumens)
D2171 Test Method for Viscosity of Asphalts by Vacuum Capillary Viscometer
D4402 Test Method for Viscosity Determination of Asphalt at Elevated Temperatures Using a Rotational Viscometer
E1 Specification for ASTM Liquid-in-Glass Thermometers
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
3. Terminology
3.1 Definitions—Definitions of terms used in this practice can be found in Terminology D1079.
4. Summary of Practice
4.1 Asample of asphalt in a loosely covered container is heated to a temperature chosen by the investigator for a period of 5
h 6 10 min. Certain characteristics of the asphalt after heat exposure at the test temperature chosen are then compared with those
characteristics before exposure.
NOTE 1—Aset temperature is required when this practice is used as part of a specification. Historically, a temperature of 204°C (400°F)[400°F] has
been used.
5. Significance and Use
5.1 When asphalts are maintained at elevated temperatures in the presence of air, their characteristics may change. Certain
blown asphalts also soften when maintained near, and particularly above, their final blowing temperatures under virtually air-free
conditions.This may happen if the asphalt is overheated for application purposes.This practice provides a uniform heat-treatment
procedure and methods for evaluating the effect of this treatment on some of the characteristics of asphalts. Changes observed
This practice is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.03 on Surfacing
and Bituminous Materials for Membrane Waterproofing and Built-UpBuilt-up Roofing.
Current edition approved Jan.May 1, 2004.2011. Published January 2004.June 2011. Originally approved in 1979. Last previous edition approved in 19962004 as
D3791–96.D3791–04. DOI: 10.1520/D3791-_D3791M–04R11E01.
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3791/D3791M – 04 (2011)
when asphalts are overheated are not indicative of changes to be expected when asphalts are heated to normal application
temper
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