ASTM D4887-99(2003)
(Test Method)Standard Practice for Preparation of Viscosity Blends for Hot Recycled Bituminous Materials
Standard Practice for Preparation of Viscosity Blends for Hot Recycled Bituminous Materials
SIGNIFICANCE AND USE
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 D 2172 and Test Method D 1856 (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 Specifications) or any other acceptable test method.
1.4 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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Standards Content (Sample)
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Designation:D4887–99 (Reapproved 2003)
Standard Practice for
Preparation of Viscosity Blends for Hot Recycled
1
Bituminous Materials
This standard is issued under the fixed designation D4887; 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 D2172 Test Methods for Quantitative Extraction of Bitu-
men From Bituminous Paving Mixtures
1.1 This practice covers the procedure for preparation of hot
D3381 Specification for Viscosity-Graded Asphalt Cement
recycled bituminous blends for testing in the laboratory. The
for Use in Pavement Construction
procedure involves an iterative trial blend process followed by
the preparation of batch blends.
3. Summary of Practice
1.2 The batch blends can be used for extensive evaluation
3.1 The percentage of a recycling agent or paving-grade-
such as viscosity, penetration, ductility, aging properties (such
asphalt required to meet a target viscosity is initially deter-
as Rolling Thin Film Oven or Thin-Film Oven tests, or both
mined on a weight basis by the use of a viscosity blend chart
(RTFO/TFO)), composition analysis, solubility analysis, and
as illustrated in Fig. 1. A 10.0 6 0.1-g (minimum) trial blend
other user-selected tests.
consisting of the recycling agent or paving grade asphalt and
1.3 This practice assumes that a representative reclaimed
reclaimed RAP binder is prepared in the laboratory. The
asphalt pavement (RAP) sample is extracted and the aged
viscosity of the trial blend at 60°C (140°F) is compared to the
binder recovered using Test Methods D2172 and Test Method
target viscosity. If the blend viscosity is not within the limits of
D1856 (this practice may be modified by using a rotary
Specification D3381 about the target value, another trial blend
evaporator which is extensively evaluated in the minutes of the
2
is prepared using adjusted proportions of the same or an
18th Pacific Coast Conference on Asphalt Specifications)or
alternate grade modifier, or both, and the RAP binder. A batch
any other acceptable test method.
blend larger than the trial blend can then be prepared after the
1.4 This standard does not purport to address all of the
target viscosity is achieved to facilitate additional tests.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
NOTE 1—It is recognized that Test Method D2171 requires 20 mL
priate safety and health practices and determine the applica- (minimum) of asphalt sample; however, due to enormous resources
involved in extraction and recovery, plus conducting a number of
bility of regulatory limitations prior to use.
iterations, a 10.0 6 0.1-g (minimum) sample is suggested to be adequate
for this practice. The accuracy of Test Method D2171 is not significantly
2. Referenced Documents
affected by the change in sample size.
3
2.1 ASTM Standards:
D1856 Test Method for Recovery ofAsphalt From Solution
4. Significance and Use
by Abson Method
4.1 A standard procedure for blend preparation is essential
D2171 Test Method for Viscosity of Asphalts by Vacuum
to ensure material quality, specification compliance, and pro-
Capillary Viscometer
cedural uniformity.
5. Apparatus
1
This practice is under the jurisdiction of ASTM Committee D04 on Road and
5.1 Beakers, 50-mL, 600-mL capacity or other suitable
Paving Materials and is the direct responsibility of Subcommittee D04.25 on
Analysis of Bituminous Mixtures.
containers.
Current edition approved Dec. 1, 2003. Published December 2003. Originally
5.2 Hot plate.
approved in 1989. Last previous edition approved in 1999 as D4887 – 99. DOI:
5.3 Glass stirring rod.
10.1520/D4887-99R03.
2
Asphalt Recovery Subcommittee Report, San Francisco, CA, May 17–18,
6. Procedure
1983.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Weigh the RAP binder and recycling agent or paving-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
grade-asphaltinappropriateproportionsinaccordancewith3.1
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. in a 10.0 6 0.1-g specimen or larger for a trial blend. Prepare
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D4887–99 (2003)
NOTE 1—How to Use the Chart:
(1) Plot reclaimed asphalt viscosity 60°C (140°F) on left ordinate (A).
(2) Plot recycling agent viscosity 60°C (140°F) on right ordinate (B).
(3) Connect points A and B with a straight line.
(4) Draw a horizontal line t
...
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