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Standard Test Method for Determining Fracture Energy of Asphalt-Aggregate Mixtures Using the Disk-Shaped Compact Tension Geometry
Automaticky preložený názov:
Štandardná skúšobná metóda pre stanovenie lomovej energie asfaltových zmesí kameniva Používanie disku v tvare Compact Tension geometrie
NORMA vydaná dňa 1.12.2013
Označenie normy: ASTM D7313-13
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.12.2013
Kód tovaru: NS-38140
Počet strán: 8
Približná hmotnosť: 24 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
asphalt concrete, crack growth, cracking, crack mouth opening displacement, disk-shaped compact tension test, fracture energy, temperature test, ICS Number Code 93.080.20 (Road construction materials)
Significance and Use | ||||||||||||||||
4.1 The test method was developed for determining the fracture resistance of asphalt-aggregate mixtures. The fracture resistance can help differentiate mixtures whose service life might be compromised by cracking. The test method is generally valid for specimens that are tested at temperatures of 10°C (50°F) or below (see Note 1). The specimen geometry is readily adapted to 150 mm diameter specimens, such as fabricated from Superpave (trademark) gyratory compactors (Test Method D6925), that are used for the asphalt concrete design process. The specimen geometry can also be adapted for forensic investigations using field cores of pavements where thin lifts are present. This geometry has been found to produce satisfactory results for asphalt mixtures with nominal maximum aggregates size ranging from 4.75 to 19 mm.5 1.1 This test method covers the
determination of fracture energy (Gf) of
asphalt-aggregate mixtures using the disk-shaped compact tension
geometry. The disk-shaped compact tension geometry is a circular
specimen with a single edge notch loaded in tension. The fracture
energy can be utilized as a parameter to describe the fracture
resistance of asphalt concrete. The fracture energy parameter is
particularly useful in the evaluation of mixtures with ductile
binders, such as polymer-modified asphalt concrete, and has been
shown to discriminate between these materials more broadly than the
indirect tensile strength parameter (AASHTO T322,
Wagoner1.2 The specimen geometry and
terminology (disk-shaped compact tension, DC(T)) is modeled after
Test Method E399 for Plane-Strain Fracture Toughness of Metallic
Materials, Appendix A6, with modifications to allow fracture
testing of asphalt concrete.
1.3 The test method describes the testing apparatus, instrumentation, specimen fabrication, and analysis procedures required to determine fracture energy of asphalt concrete and similar quasi-brittle materials. 1.4 The text of this test method 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 test method. 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||||||
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