ASTM D6084-97
(Test Method)Standard Test Method for Elastic Recovery of bituminuous Materials by Ductilometer
Standard Test Method for Elastic Recovery of bituminuous Materials by Ductilometer
SCOPE
1.1 This test method covers the elastic recovery of a bituminous material measured by the recoverable strain determined after severing an elongated briquet specimen of the material of the form described in 4.1. The specimens are pulled to a specified distance at a specified speed and at a specified temperature. Unless otherwise specified, the test shall be made at a temperature of 25 + or - 0.5°C (77 + or - 0.9°F) and with a speed of 5 cm/min + or - 5.0%.
1.2 The values stated in SI units are to be regarded as 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: D 6084 – 97
Standard Test Method for
Elastic Recovery of Bituminous Materials by Ductilometer
This standard is issued under the fixed designation D 6084; 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 4. Apparatus
1.1 This test method covers the elastic recovery of a 4.1 Mold —The mold shall be similar in design to that
bituminous material measured by the recoverable strain deter- shown in Fig. 1 . The mold shall be made of brass, the ends b
mined after severing an elongated briquet specimen of the and b8 being known as clips, and the parts a and a8 as sides of
material of the form described in 4.1. The specimens are pulled the mold. The dimensions of the assembled mold shall be as
to a specified distance at a specified speed and at a specified shown in Fig. 1 with the permissible variations indicated. (See
temperature. Unless otherwise specified, the test shall be made Note 1.)
at a temperature of 25 6 0.5°C (77 6 0.9°F) and with a speed 4.2 Water Bath for Conditioning Specimen—Maintain the
of 5 cm/min 6 5.0 %. water bath at the specified test temperature, varying not more
1.2 The values stated in SI units are to be regarded as the than 0.1°C (0.18°F) from this temperature. The volume of
standard. water shall be not less than 10 L, and the specimen immersed
1.3 This standard does not purport to address all of the to a depth of not less than 10 cm and supported on a perforated
safety concerns, if any, associated with its use. It is the shelf not less than 5 cm from the bottom of the bath.
responsibility of the user of this standard to establish appro- 4.3 Testing Machine— For elongating the briquet of bitu-
priate safety and health practices and determine the applica- minous material, any apparatus may be used that is so
bility of regulatory limitations prior to use. constructed that the specimen will be continuously immersed
in water as specified in 6.3, while the two clips are pulled apart
2. Referenced Documents
at a uniform speed, as specified, without undue vibration. The
2.1 ASTM Standards:
testing machine shall incorporate a means in which the
C 670 Practice for Preparing Precision and Bias Statements elongation can be measured in centimetres. (See Note 2.)
for Test Methods for Construction Materials
4.4 Thermometer— A thermometer having a range as shown
D 5 Test Method for Penetration of Bituminous Materials
as follows and conforming to the requirements prescribed in
D 113 Test Method for Ductility of Bituminous Materials Specification E 1. (See Note 3.)
D 140 Practice for Sampling Bituminous Materials
Temperature Range ASTM Thermometer No.
–8 to 32°C 63C
E 1 Specification for ASTM Thermometers
18 to 89°F 63F
E 11 Specification for Wire-Cloth Sieve for Testing Pur-
poses 4.5 Scissors—Any type of conventional scissors capable of
E 77 Methods of Verification and Calibration of Thermom- cutting the bituminous material at the test temperature.
eters 4.6 Oven—An oven capable of maintaining 135 6 5.5°C
(275 6 10°F).
3. Significance and Use
NOTE 1—Clips for the mold are the same as specified in Fig. 1 of Test
3.1 This test method is useful in confirming that a material
Method D 113.
has been added to the asphalt to provide a significant elasto-
NOTE 2—The testing machine may be the same as specified in Test
meric characteristic. It does not necessarily identify the type or
Method D 113.
amount of material added. NOTE 3—In those cases where the elastic recovery specimens are
conditioned in the standard penetration bath at 25°C (77°F), the thermom-
eter as prescribed for Test Method D 5 may be substituted in place of those
1 shown.
This test method is under the jurisdiction of ASTM Committee D-4 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.44 on
Rheological Tests.
Current edition approved Feb. 10, 1997. Published April 1998. The sole source of supply of the apparatus known to the committee at this time
Annual Book of ASTM Standards, Vol 04.02. is Humboldt Manufacturing Company, 7300 W. Agatite Ave., Chicago, IL 60656. If
Annual Book of ASTM Standards, Vol 04.03. you are aware of alternative suppliers, please provide this information to ASTM
Annual Book of ASTM Standards, Vol 14.03. Headquarters. Your comments will receive careful consideration at a meeting of the
Annual Book of ASTM Standards, Vol 14.02. responsible technical committee, which you may attend.
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D 6084
Spacer
A 36.5 6 0.1 mm
B30 6 0.1 mm
C17 6 0.1 mm
D10 6 0.1 mm
NOTE 1—Dimensions for t and t8 can be found in Test Method D 113.
FIG. 1 Mold for Ductility Test Specimen
5. Sample Preparation min. Remove the test specimens from the water bath and
immediately trim the excess material with a hot putty knife or
5.1 Asphalt Emulsion Residue—If the sample is a residual
spatula to make the molds just level full. (See Note 6.)
product from the emulsion distillation test at 260°C (500°F) or
6.2 Keeping Specimens at Standard Temperature—Place the
a polymer modified asphalt emulsion residual product from a
trimmed specimen and mold in the water bath at the specified
distillation at lower temperatures, stir the contents in the still
test temperature for 90 6 5 min prior to testing. Remove the
and immediately pour portions of the residue into suitable
specimen from the plate by a shearing action between speci-
molds for making the required tests. If it is suspected there is
men and plate, avoiding any bending of the test specimen.
foreign matter in the residue, pour the material through a 300-
Remove the side pieces a and a8 being careful not to distort or
μm (No. 50) sieve prior to pouring into the test molds. (See
fracture the specimen. Attach the specimen to the testing
Note 4.)
machine and immediately test the specimen.
5.2 Ambient Sample— If the sample is an asphalt cement or
a polymer modified asphalt cement, carefully heat the sample
6.3 Testing—Attach the rings at each end of the clips to the
in a covered container to prevent local overheating until it has pins or hooks in the testing machine and pull the two clips apar
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