ASTM D3497-79(1995)

Standard Test Method for Dynamic Modulus of Asphalt Mixtures

SCOPE
1.1 This test method covers procedures for preparing and testing asphalt mixtures to determine dynamic modulus values. The procedure described covers a range of both temperature and loading frequency. The minimum recommended test series consists of testing at 41, 77, and 104°F (5, 25, and 40°C) at loading frequencies of 1, 4, and 16 Hz for each temperature.
1.2 This method is applicable to asphalt paving mixtures similar to mixes 3A, 4A, 5A, 6A, and 7A, as defined by Specification D 3515.  
1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-1994
• ICS: 91.100.50 - Binders. Sealing materials
• ICS: 93.080.20 - Road construction materials
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.26 - Fundamental/Mechanistic Tests

Relations

• Replaced By: ASTM D3497-79(2003) - Standard Test Method for Dynamic Modulus of Asphalt Mixtures (Withdrawn 2009)
• Effective Date: 26-Oct-1979

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation: D 3497 – 79 (Reapproved 1995)
Standard Test Method for
Dynamic Modulus of Asphalt Mixtures
This standard is issued under the fixed designation D 3497; 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. Summary of Test Method
1.1 This test method covers procedures for preparing and 4.1 A sinusoidal (haversine) axial compression stress is
testing asphalt mixtures to determine dynamic modulus values. applied to a specimen of asphalt concrete at a given tempera-
The procedure described covers a range of both temperature ture and loading frequency. The resulting recoverable axial
and loading frequency. The minimum recommended test series strain response of the specimen is measured and used to
consists of testing at 41, 77, and 104°F (5, 25, and 40°C) at calculate dynamic modulus.
loading frequencies of 1, 4, and 16 Hz for each temperature.
5. Significance and Use
1.2 This method is applicable to asphalt paving mixtures
5.1 The values of dynamic modulus can be used for both
similar to mixes 3A, 4A, 5A, 6A, and 7A, as defined by
Specification D 3515. asphalt paving mixture design and asphalt pavement thickness
design.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
6. Apparatus
responsibility of the user of this standard to establish appro-
6.1 Testing Machine—An electro-hydraulic testing machine
priate safety and health practices and determine the applica-
with a function generator capable of producing a haversine
bility of regulatory limitations prior to use.
wave form has proven to be most suitable for use in dynamic
2. Referenced Documents
modulus testing. The testing machine should have the capabil-
ity of applying the loads over a range of frequencies from 0.1
2.1 ASTM Standards:
C 617 Practice for Capping Cylindrical Concrete Speci- to 20 Hz and stress levels up to 100 psi (690 kPa).
6.2 Temperature-Control System—The temperature-control
mens
D 3496 Method for Preparation of Bituminous Mixture system should be capable of a temperature range from 32 to
Specimens for Dynamic Modulus Testing 120 6 1°F (0 to 50 6 0.5°C).The temperature chamber should
be large enough to hold six specimens.
D 3515 Specification for Hot-Mixed, Hot-Laid Bituminous
Paving Mixtures 6.3 Measurement System—The measurement system con-
sists of a two-channel recorder, stress- and strain-measuring
3. Terminology
devices, a suitable signal amplification, and excitation equip-
3.1 Definitions: ment. The measurement system should have the capability for
3.1.1 dynamic modulus—the absolute value of the complex determining loading up to 3000 lbf (13.3 kN) from a recording
modulusthatdefinestheelasticpropertiesofalinearviscoelas- with a minimum sensitivity of 2 % of the test load per
tic material subjected to a sinusoidal loading, ?E*? millimetre of chart paper. This system should also be capable
3.1.2 complex modulus—a complex number that defines the for use in determining strains over a range of full-scale
relationship between stress and strain for a linear viscoelastic recorder outputs from 300 to 5000 micro units of strain.At the
material, E*. highest sensitivity setting, the system should be able to display
3.1.3 linear material—a material whose stress to strain ratio 4microstrainunitsorlesspermillimetreontherecordedchart.
is independent of the loading stress applied. 6.3.1 Recorder—The recorder amplitude should be inde-
pendent of frequency for tests conducted up to 20 Hz.
6.3.2 Strain Measurement—The values of axial strain are
measured by bonding two wire strain gages at mid-height
This test method is under the jurisdiction of ASTM Committee D-4 on Road
opposite each other on the specimens. The gages are wired in
Paving Materials and is the direct responsibility of Subcommittee D04.26 on
Fundamental/Mechanistic Tests.
Current edition approved Oct. 26, 1979. Published December 1979. Originally
published as D 3497 – 76 T. Last previous edition D 3497 – 76 T.
2 4
Annual Book of ASTM Standards, Vol 04.02. The Baldwin-Lima-Hamilton SR-4 Type A-1S 13 strain gage has been found
Annual Book of ASTM Standards, Vol 04.03. satisfactory for this purpose.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D 3497
a Wheatstone Bridge circuit with two active gages on the test 8.4 For pavement-cored specimens, test six specimens at
specimen and two temperature-compensating gages on an each temperature and frequency condition once. Start at the
unstressed specimen exposed to the same environment as the lowest temperature and run the three frequencies from fastest
test specimen. The temperature-compensating gages should be to slowest. Bring specimens to specified temperature before
at the same position on the specimen as the active gages. The each test. Repeat for next highest temperature.
sensitivity and type of measurement device should be selected 8.5 For laboratory-molded specimens, test three specimens
to provide the strain readout required in 6.3. at each temperature and frequency condition twice. Conduct
6.3.3 L
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