ASTM D4887-99
(Test Method)Standard Test Method for Preparation of Viscosity Blends for Hot Recycled Bituminous Materials
Standard Test Method for Preparation of Viscosity Blends for Hot Recycled Bituminous Materials
SCOPE
1.1 This test method 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 test method assumes that a representative reclaimed asphalt pavement (RAP) sample is extracted and the aged binder recovered using Test Methods D2172 and D1856 (this test method 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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Designation: D 4887 – 99
Standard Practice for
Preparation of Viscosity Blends for Hot Recycled
Bituminous Materials
This standard is issued under the fixed designation D 4887; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope asphalt required to meet a target viscosity is initially deter-
mined on a weight basis by the use of a viscosity blend chart
1.1 This practice covers the procedure for preparation of hot
as illustrated in Fig. 1. A 10.06 0.1-g (minimum) trial blend
recycled bituminous blends for testing in the laboratory. The
consisting of the recycling agent or paving grade asphalt and
procedure involves an iterative trial blend process followed by
reclaimed RAP binder is prepared in the laboratory. The
the preparation of batch blends.
viscosity of the trial blend at 60°C (140°F) is compared to the
1.2 The batch blends can be used for extensive evaluation
target viscosity. If the blend viscosity is not within the limits of
such as viscosity, penetration, ductility, aging properties (such
Specification D 3381 about the target value, another trial blend
as Rolling Thin Film Oven or Thin-Film Oven tests, or both
is prepared using adjusted proportions of the same or an
(RTFO/TFO)), composition analysis, solubility analysis, and
alternate grade modifier, or both, and the RAP binder. A batch
other user-selected tests.
blend larger than the trial blend can then be prepared after the
1.3 This practice assumes that a representative reclaimed
target viscosity is achieved to facilitate additional tests.
asphalt pavement (RAP) sample is extracted and the aged
binder recovered using Test Methods D 2172 and D 1856 (this
NOTE 1—It is recognized that Test Method D 2171 requires 20 mL
practice may be modified by using a rotary evaporator which is
(minimum) of asphalt sample; however, due to enormous resources
involved in extraction and recovery plus conducting a number of
extensively evaluated in the minutes of the 18th Pacific Coast
iterations, a 10.0 6 0.1-g (minimum) sample is suggested to be adequate
Conference on Asphalt Specifications ) or any other acceptable
for this practice. The accuracy of Test Method D 2171 is not significantly
test method.
affected by the change in sample size.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 A standard procedure for blend preparation is essential
priate safety and health practices and determine the applica-
to ensure material quality, specification compliance, and pro-
bility of regulatory limitations prior to use.
cedural uniformity.
2. Referenced Documents
5. Apparatus
2.1 ASTM Standards:
5.1 Beakers, 50-mL, 600-mL capacity or other suitable
D 1856 Test Method for Recovery of Asphalt from Solution
containers.
by Abson Method
5.2 Hot plate.
D 2171 Test Method for Viscosity of Asphalts by Vacuum
5.3 Glass stirring rod.
Capillary Viscometer
D 2172 Test Methods for Quantitative Extraction of Bitu-
6. Procedure
men from Bituminous Paving Mixtures
6.1 Weigh the RAP binder and recycling agent or paving-
D 3381 Specification for Viscosity-Graded Asphalt Cement
grade-asphalt in appropriate proportions in accordance with 3.1
for Use in Pavement Construction
in a 10.0 6 0.1-g specimen or larger for a trial blend. Prepare
the 10.0 6 0.1-g trial blend in the 50-mL container while
3. Summary of Practice
preparing a larger batch (if required) in the 600-mL container
3.1 The percentage of a recycling agent or paving-grade-
or other suitable containers.
NOTE 2—For ease of handling during proportioning, the RAP binder
This practice is under the jurisdiction of ASTM Committee D-4 on Road and
and recycling agent or paving grade asphalt may be frozen (6 6 1°F is
Paving Materials and is the direct responsibility of Subcommittee D04.25 on
suggested) for 1 to 2 h. Aromatic oils may not require freezing. The frozen
Analysis of Bituminous Mixtures.
state facilitates chipping and weighing the desired quantities with relative
Current edition approved June 10, 1999. Published August 1999. Originally
ease. Weighing should be executed quickly b
...
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