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ASTM-D6816:2002 Edition

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D6816-02 Standard Practice for Determining Low-Temperature Performance Grade (PG) of Asphalt Binders (Withdrawn 2011)

Published By Publication Date Number of Pages
ASTM 2002 9
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ASTM D6816-02

Historical Standard: Standard Practice for Determining Low-Temperature Performance Grade (PG) of Asphalt Binders (Withdrawn 2011)

ASTM D6816

Scope

1.1 This practice covers the calculation of low-temperature properties of asphalt binders using data from the bending beam rheometer (see Test Method D 6648) (BBR) and the direct tension tester (see Test Method D 6723) (DTT). It can be used on data from unaged material or from material aged using Test Method D 2872 (RTFOT), Practice D 6521 (PAV), or Test Method D 2872 (RTFOT) and Practice D 6521 (PAV). It can be used on data generated within the temperature range from +6C to -36C. This practice generates data suitable for use in binder specifications such as Specification D 6373.

1.2 This practice is only valid for data on materials that fall within the scope of suitability for both Test Method D 6648 and Test Method D 6723.

1.3 This practice can be used to determine the following:

1.3.1 Critical cracking temperature of an asphalt binder, and

1.3.2 Whether or not the failure stress exceeds the thermal stress in a binder at a given temperature.

1.4 This practice determines the critical cracking temperature for a typical asphalt binder based on the determination of the temperature where the asphalt binder’s strength equals its thermal stress as calculated by this practice. The temperature so determined is intended to yield a low temperature PG Grade of the sample being tested. The low temperature PG grade is intended for use in purchase specifications and is not intended to be a performance prediction of the HMA (Hot Mix Asphalt) in which the asphalt binder is used.

1.5 The development of this standard was based on SI units. In cases where units have been omitted, SI units are implied.

1.6 This standard may involve hazardous materials, operations, and equipment. 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.

Note 1—The algorithms contained in this standard require implementation by a person trained in the subject of numerical methods and viscoelasticity. However, due to the complexity of the calculations they must, of necessity, be performed on a computer. Software to perform the calculation may be written, purchased as a spreadsheet, or as a stand-alone program.

Keywords

asphalt binder; bending beam rheometer; critical cracking temperature; direct tension; failure; failure stress; fracture; thermal cracking; thermally induced stress

ICS Code

ICS Number Code 93.080.20 (Road construction materials)

DOI: 10.1520/D6816-02

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Summary of Practice
Significance and Use
Methodology and Required Data
3 Calculations
5 Critical Cracking Temperature Determination of an Asphalt Binder
Pass-Fail Determination for the PG Grade of an Asphalt Binder
Report
Precision and Bias
Keywords
TABLE 1
6 X1. EXAMPLE OF RMS CALCULATION
X1.1
X1.2
X1.3
X1.4
X1.5
TABLE X1.1
TABLE X1.2
TABLE X1.3
TABLE X1.4
7 X2. EXAMPLE OF RESULTS FOR THE EXAMPLE DATA SET
X2.1
X2.2
X2.3
FIG. X1.1
TABLE X2.1
8 REFERENCES
FIG. X2.1
ASTM-D6816
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