ASTM D6084/D6084M-21 PDF
Standard Test Method for Elastic Recovery of Asphalt Materials by Ductilometer
Standard Test Method for Elastic Recovery of Asphalt Materials by Ductilometer
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 5
- Дата публикации:
- 1 ноября 2021 г.
- Издание:
- D6084/D6084M
- ICS:
- 75.140
SIGNIFICANCE AND USE 3.1 This test method is useful in confirming that a material has been added to the asphalt to provide a significant elastomeric characteristic. It does not necessarily identify the type or amount of material added. Note 1: The quality of results produced by this standard is 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 D3666 are generally considered capable of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar acceptable guidance provides a means of evaluating and controlling some of those factors. SCOPE 1.1 This test method assesses the elastic recovery of an asphalt 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 ± 0.5 °C [77 ± 0.9 °F] and with a speed of 5 cm/min ± 5 %. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3 Warning—Mercury has been designated by the United States Environmental Protection Agency and many state agencies as a hazardous material that can cause central nervous system, kidney, and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury-containing products. See the applicable Material Safety Data Sheet (MSDS) for details and EPA’s website (http://www.epa.gov/mercury/index.htm) for additional information. Users should be aware that selling mercury and/or mercury-containing products in your state may be prohibited by state law. 1.4 The 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. 1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This 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.
Abstract
Overview
ASTM D6084/D6084M-21: Standard Test Method for Elastic Recovery of Asphalt Materials by Ductilometer is a recognized test procedure established by ASTM International for evaluating the elastic recovery of asphalt binders and emulsified asphalts. This method determines the recoverable strain after an asphalt specimen, shaped into a standardized briquet form, is elongated and then severed. Elastic recovery testing is crucial in confirming the presence of elastomeric modifiers in asphalt materials, ensuring their suitability for modern road and paving applications where flexibility and resistance to cracking are essential.
Key Topics
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Elastic Recovery Measurement: The standard provides a systematic approach for assessing how well an asphalt material returns to its original length after being stretched and cut. This characteristic is fundamental in evaluating the elastic properties conferred by polymer or other additives.
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Test Method: Specimens are prepared using a specified mold and conditioned in a controlled temperature environment-typically 25 ± 0.5 °C (77 ± 0.9 °F). The samples are elongated at a defined rate (5 cm/min ± 5%). Recovery is calculated as a percentage after the specimen is cut and left to recover for a set period.
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Separate Use of Units: Results can be reported in SI or inch-pound units, but units must not be combined in a single analysis, ensuring consistency and comparability of data.
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Competence and Equipment Reliability: Outcomes depend heavily on operator skill and the maintenance, calibration, and capability of testing equipment. Labs meeting ASTM D3666 requirements are generally competent for such analyses, though consistent quality assurance is emphasized.
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Safety Considerations: Caution is advised where mercury thermometers are used, considering the hazardous nature of mercury. Users must adhere to legal and environmental regulations governing hazardous materials.
Applications
ASTM D6084/D6084M-21 serves several practical purposes in the road construction and paving materials industry:
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Quality Control for Polymer-Modified Asphalt: This test is especially useful for verifying that elastomeric or polymer materials have been incorporated effectively in asphalt binders, enhancing their flexibility and crack resistance.
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Performance Assessment of Asphalt Emulsions: Agencies and contractors use this method to select and validate materials that will withstand thermal and mechanical stresses in real-world conditions.
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Material Development and Specification Compliance: The method supports research and development of advanced asphalt materials and ensures compliance with regional or international paving material specifications.
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Interlaboratory and Production Consistency: By following this standard, different laboratories and material suppliers can ensure consistent performance metrics for asphalt products, aiding in market competitiveness and regulatory adherence.
Related Standards
The ASTM D6084/D6084M-21 standard is referenced alongside several other key ASTM standards relevant to asphalt testing and quality assurance, including:
- ASTM D5/D5M - Penetration of Bituminous Materials
- ASTM D113 - Ductility of Asphalt Materials
- ASTM D1754/D1754M - Effects of Heat and Air on Asphalt (Thin-Film Oven Test)
- ASTM D2872 - Effect of Heat and Air on a Moving Film of Asphalt (Rolling Thin-Film Oven Test)
- ASTM D3666 - Requirements for Agencies Testing and Inspecting Road and Paving Materials
- ASTM E1, E11, E77, E220, E644, E1137/E1137M, E2251 - Thermometer and temperature calibration specifications used for laboratory precision
Practical Value
Implementing ASTM D6084/D6084M-21 allows material suppliers, engineers, and quality control managers to:
- Demonstrate the effectiveness of asphalt modifiers in enhancing elasticity
- Maintain consistent product quality for paving projects
- Comply with industry, regional, and international material specifications
- Reduce pavement failures related to low flexibility, especially in climates subject to temperature fluctuations
Adhering to this standard underpins the reliability, performance, and longevity of modern asphalt pavements in diverse infrastructure projects.
Технические детали
- Технический комитет
- D04 - Road and Paving Materials
- SKU
- ASTM D6084/D6084M-21
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