Standard Test Method for Determining Fatigue Failure of Asphalt-Aggregate Mixtures with the Four-Point Beam Fatigue DeviceName übersetzen
NORM herausgegeben am 1.7.2021
Bezeichnung normen: ASTM D8237-21
Ausgabedatum normen: 1.7.2021
Zahl der Seiten: 12
Gewicht ca.: 36 g (0.08 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
asphalt mixture fatigue, asphalt mixture flexural testing, asphalt mixture stiffness, asphalt mixture tensile testing, fatigue life, flexural bending,, ICS Number Code 93.080.20 (Road construction materials)
|Significance and Use|
5.1The laboratory fatigue life determined by this standard for beam specimens has been used to estimate the fatigue life of asphalt mixture pavement layers under repeated traffic loading. Although the field performance of asphalt mixtures is impacted by many factors (traffic variation, loading rate, and wander; climate variation; rest periods between loads; aging; etc.), it has been more accurately predicted when laboratory properties are known along with an estimate of the strain level induced at the layer depth by the traffic wheel load traveling over the pavement.
Note 2:The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification are generally considered capable of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification alone does not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.
1.1This test method provides a procedure for determining a fatigue curve that is developed using three or more strain levels. The resulting data can be used in the fatigue models for mechanistic-empirical pavement design (that is, Pavement ME). Failure points are determined for estimating the fatigue life of 380mm long by 50mm thick by 63mm in breadth (width) asphalt mixture beam (rectangular prism) specimens sawed from laboratory or field-compacted asphalt mixture, which are subjected to repeated flexural bending.
1.2The largest nominal maximum aggregate size (NMAS) recommended for beams 50mm thick is 19mm. Beams made with an NMAS greater than 19mm might significantly interfere with the material response, thereby affecting the repeatability of the test.
1.3The text of this standard 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 standard.
1.4UnitsThe values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard, with the exception of degrees () where angle is specified in accordance with .
1.5This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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