ASTM D4887/D4887M-11(2021)e1
(Practice)Standard Practice for Preparation of Viscosity Blends for Hot Recycled Asphalt Materials
Standard Practice for Preparation of Viscosity Blends for Hot Recycled Asphalt Materials
SIGNIFICANCE AND USE
4.1 A standard procedure for blend preparation is essential to ensure material quality, specification compliance, and procedural uniformity.
SCOPE
1.1 This practice covers the procedure for preparation of hot recycled bituminous blends for testing in the laboratory. The procedure involves an iterative trial blend process followed by the preparation of batch blends.
1.2 The batch blends can be used for extensive evaluation such as viscosity, penetration, ductility, aging properties (such as Rolling Thin Film Oven or Thin-Film Oven tests, or both (RTFO/TFO)), composition analysis, solubility analysis, and other user-selected tests.
1.3 This practice assumes that a representative reclaimed asphalt pavement (RAP) sample is extracted and the aged binder recovered using Test Methods D2172/D2172M and Test Method D1856 (this practice may be modified by using a rotary evaporator which is extensively evaluated in the minutes of the 18th Pacific Coast Conference on Asphalt Specifications2) or any other acceptable test method.
1.4 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 nonconformance with the standard.
1.5 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 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.
General Information
Relations
Standards Content (Sample)
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.
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Designation: D4887/D4887M − 11 (Reapproved 2021)
Standard Practice for
Preparation of Viscosity Blends for Hot Recycled Asphalt
Materials
This standard is issued under the fixed designation D4887/D4887M; 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.
ε NOTE—Section 1 was updated editorially in December 2021.
1. Scope priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 Thispracticecoverstheprocedureforpreparationofhot
1.7 This international standard was developed in accor-
recycled bituminous blends for testing in the laboratory. The
dance with internationally recognized principles on standard-
procedure involves an iterative trial blend process followed by
ization established in the Decision on Principles for the
the preparation of batch blends.
Development of International Standards, Guides and Recom-
1.2 The batch blends can be used for extensive evaluation
mendations issued by the World Trade Organization Technical
such as viscosity, penetration, ductility, aging properties (such
Barriers to Trade (TBT) Committee.
as Rolling Thin Film Oven or Thin-Film Oven tests, or both
(RTFO/TFO)), composition analysis, solubility analysis, and
2. Referenced Documents
other user-selected tests.
2.1 ASTM Standards:
1.3 This practice assumes that a representative reclaimed
D1856Test Method for Recovery of Asphalt from Solution
asphalt pavement (RAP) sample is extracted and the aged by Abson Method
binderrecoveredusingTestMethodsD2172/D2172MandTest
D2171/D2171MTest Method for Viscosity of Asphalts by
MethodD1856(thispracticemaybemodifiedbyusingarotary Vacuum Capillary Viscometer
evaporatorwhichisextensivelyevaluatedintheminutesofthe D2172/D2172MTestMethodsforQuantitativeExtractionof
18th Pacific Coast Conference on Asphalt Specifications)or Asphalt Binder from Asphalt Mixtures
any other acceptable test method. D3381/D3381MSpecification for Viscosity-Graded Asphalt
Binder for Use in Pavement Construction
1.4 The values stated in either SI units or inch-pound units
D6373 Specification for Performance-Graded Asphalt
are to be regarded separately as standard. The values stated in
Binder
each system may not be exact equivalents; therefore, each
D6816Practice for Determining Low-Temperature Perfor-
system shall be used independently of the other. Combining
manceGrade(PG)ofAsphaltBinders(Withdrawn2021)
values from the two systems may result in nonconformance
D7175Test Method for Determining the Rheological Prop-
with the standard.
erties of Asphalt Binder Using a Dynamic Shear Rheom-
1.5 The text of this standard references notes and footnotes
eter
which provide explanatory material.These notes and footnotes
(excluding those in tables and figures) shall not be considered
3. Summary of Practice
as requirements of the standard.
3.1 This specification covers the use of a viscosity blending
1.6 This standard does not purport to address all of the
chart shown in Fig. 1 or by a Performance Grade (PG)
safety concerns, if any, associated with its use. It is the
temperature blending chart shown in Fig. 2 to determine the
responsibility of the user of this standard to establish appro-
percentage of a recycling agent, rejuvenating agent, or paving-
gradeasphalt(hereafterreferredtoasvirginmodifier)required
to meet the target viscosity or PG temperature. The blending
This practice is under the jurisdiction of ASTM Committee D04 on Road and
Paving Materials and is the direct responsibility of Subcommittee D04.25 on
Analysis of Asphalt Mixtures. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 15, 2021. Published December 2021. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1989. Last previous edition approved in 2016 as D4887/D4887M–11 Standards volume information, refer to the standard’s Document Summary page on
(2016). DOI: 10.1520/D4887_D4887M-11R21E01. the ASTM website.
2 4
Asphalt Recovery Subcommittee Report, San Francisco, CA, May 17–18, The last approved version of this historical standard is referenced on
1983. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D4887/D4887M − 11 (2021)
NOTE1—Calculationsusingordinateviscosity(η)values(scalesAandB)canbesimplifiedbyusingloglog(100× η orη (Pa·s))suchthatordinates
–A B
and abscisca axes become linear.
FIG. 1 Percent RAM Binder Allowed Based on Viscosity
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D4887/D4887M − 11 (2021)
FIG. 2 Percent RAM Binder Allowed Based on PG Temperatures
chart based on viscosity is based upon results from Test reclaimedasphaltbinder(hereafterreferredtoasRAMbinder),
Method D2171/D2171M compared to the limits of Specifica- estimating the blend by graphical methods, and preparing a
tionD3381/D3381M.ThePGblendingchartisbaseduponthe blend of virgin modifier and the RAM binder in the laboratory.
results from Practice D6816 and Test Method D7175, which The measured properties of the blend are compared to the
are compared to the limits of Specification D6373. The target values. If the blend properties do not meet the require-
procedure consists of determining the asphalt binder grade of ments and are not within the limits of Specification D3381/
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D4887/D4887M − 11 (2021)
D3381M or D6373, another trial blend is prepared using 5.3 Glass stirring rod.
adjusted proportions of the same or an alternate virgin
6. Procedure
modifier, or both, and the RAM binder. A batch blend larger
than the trial blend can then be prepared after the target
6.1 Weigh the RAP binder and recycling agent or paving-
viscosity is achieved to facilitate additional tests.
gradeasphaltinappropriateproportionsinaccordancewith3.1
in a 10.0 6 0.1-g specimen or larger for a trial blend. Prepare
NOTE 1—It is recognized that Test Method D2171/D2171M requires
...
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