ASTM D3791/D3791M-11(2018)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3791/D3791M − 11 (Reapproved 2018)
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.
1. Scope Vacuum Capillary Viscometer
D4402/D4402MTestMethodforViscosityDeterminationof
1.1 This practice covers a procedure for evaluating some of
Asphalt at Elevated Temperatures Using a Rotational
the effects on asphalts of heating in the presence of little or no
Viscometer
air.
E1Specification for ASTM Liquid-in-Glass Thermometers
1.2 The values stated in either SI units or inch-pound units
E145 Specification for Gravity-Convection and Forced-
are to be regarded separately as standard. The values stated in
Ventilation Ovens
each system may not be exact equivalents; therefore, each
E230/E230MSpecification for Temperature-Electromotive
system shall be used independently of the other. Combining
Force (emf) Tables for Standardized Thermocouples
values from the two systems may result in non-conformance
E1137/E1137MSpecification for Industrial Platinum Resis-
with the standard.
tance Thermometers
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions—Definitions of terms used in this practice
priate safety, health, and environmental practices and deter-
can be found in Terminology D1079.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
4. Summary of Practice
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.1 A sample of asphalt in a loosely covered container is
Development of International Standards, Guides and Recom-
heated to a temperature chosen by the investigator for a period
mendations issued by the World Trade Organization Technical
of5h 610min.Certaincharacteristicsoftheasphaltafterheat
Barriers to Trade (TBT) Committee.
exposureatthetesttemperaturechosenarethencomparedwith
those characteristics before exposure.
2. Referenced Documents
NOTE1—Asettemperatureisrequiredwhenthispracticeisusedaspart
2.1 ASTM Standards:
of a specification. Historically, a temperature of 204°C [400°F] has been
D5/D5MTest Method for Penetration of Bituminous Mate-
used.
rials
D36/D36MTest Method for Softening Point of Bitumen 5. Significance and Use
(Ring-and-Ball Apparatus)
5.1 When asphalts are maintained at elevated temperatures
D140/D140MPractice for Sampling Asphalt Materials
inthepresenceofair,theircharacteristicsmaychange.Certain
D1079Terminology Relating to Roofing and Waterproofing
blown asphalts also soften when maintained near, and particu-
D2170/D2170MTest Method for Kinematic Viscosity of
larly above, their final blowing temperatures under virtually
Asphalts (Bitumens)
air-free conditions. This may happen if the asphalt is over-
D2171/D2171MTest Method for Viscosity of Asphalts by
heated 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
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
asphalts. Changes observed when asphalts are overheated are
WaterproofingandisthedirectresponsibilityofSubcommitteeD08.03onSurfacing
not indicative of changes to be expected when asphalts are
and Bituminous Materials for Membrane Waterproofing and Built-up Roofing.
Current edition approved May 1, 2018. Published June 2018. Originally
heated to normal application temperatures.
approved in 1979. Last previous edition approved in 2011 as D3791/D3791M–11.
DOI: 10.1520/D3791_D3791M–11R18.
2 6. Apparatus
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Oven—A forced-ventilation oven conforming to the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. requirements forType IIAas prescribed in Specification E145,
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D3791
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