ASTM D6648-01
Standard Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)

Standard No.

ASTM D6648-01

Release Date

2001

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D6648-08

Latest

ASTM D6648-08(2016)

Scope

The temperatures for this test are related to the winter temperature experienced by the pavement in the geographical area for which the asphalt binder is intended.

The flexural creep stiffness or flexural creep compliance, determined from this test, describes the low-temperature stress-strain-time response of asphalt binder at the test temperature within the range of linear viscoelastic response.

The low-temperature thermal cracking performance of asphalt pavements is related to the creep stiffness and the m-value of the asphalt binder contained in the mix.

The creep stiffness and the m-value are used as performance-based specification criteria for asphalt binders in accordance with AASHTO Method of Practice MP1.

1.1 This test method covers the determination of the flexural-creep stiffness or compliance and m-value of asphalt binders by means of a bending-beam rheometer. It is applicable to material having flexural-creep stiffness values in the range of 20 MPa to 1 GPa (creep compliance values in the range of 50 nPa^-1 to 1 nPa^-1) and can be used with unaged material or with materials aged using aging procedures such as Test Method D2872, Test Method D1754, or Practice D6521. The test apparatus may be operated within the temperature range from -36^oC to 0^oC.

1.2 Test results are not valid for test specimens that deflect more than 4 mm or less than 0.08 mm when tested in accordance with this test method.

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.

ASTM D6648-01 Referenced Document

• ASTM C802 Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials
• ASTM D140 Standard Practice for Sampling Bituminous Materials
• ASTM D1754 Standard Test Method for Effect of Heat and Air on Asphaltic Materials (Thin-Film Oven Test)
• ASTM D2872 Standard Test Method for Effect of Heat and Air on a Moving Film of Asphalt (Rolling Thin-Film Oven Test)
• ASTM D6521 Standard Practice for Accelerated Aging of Asphalt Binder Using a Pressurized Aging Vessel (PAV)
• ASTM E77 Standard Test Method for Inspection and Verification of Thermometers

ASTM D6648-01 history

• 2008 ASTM D6648-08(2016) Standard Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)
• 2008 ASTM D6648-08 Standard Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)
• 2001 ASTM D6648-01 Standard Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)