ASTM-D7552 2009

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D7552-09 Standard Test Method for Determining the Complex Shear Modulus (G*) Of Bituminous Mixtures Using Dynamic Shear Rheometer

Published By	Publication Date	Number of Pages
ASTM	2009	11

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Category: ASTM

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Description

ASTM D7552-09

Historical Standard: Standard Test Method for Determining the Complex Shear Modulus (G*) Of Bituminous Mixtures Using Dynamic Shear Rheometer

ASTM D7552

Scope

1.1 This test method covers the determination of the complex shear modulus of bituminous mixtures using torsion rectangular geometry on a dynamic shear rheometer (DSR). It is applicable to bituminous mixtures having complex shear modulus values greater than 1 × 10⁴ Pa when tested over a range of temperatures from 10°C to 76°C at frequencies of 0.01 to 25 Hz and strains of 0.001 % to 0.1 %. The determination of complex shear modulus is typically determined at 20°C to 70°C at 0.01% strain at 10 discrete frequency values covering 0.01 to 10 Hz. From these data, temperature or frequency master curves can be generated as required. This test method is intended for determining the complex shear modulus of bituminous mixtures as required for specification testing or quality control of bituminous mixture production.

1.2 This test method is appropriate for laboratory prepared and compacted mixtures, field produced and laboratory compacted mixtures or field cores, regardless of binder type or grade and regardless of whether RAP is used in the mixture. Due to the geometry of the specimens being tested this test method is not applicable to open-graded or SMA mixtures. It has been found to be appropriate for dense-graded mixtures, whether coarse- or fine-graded, with 19 mm or smaller nominal maximum aggregate size.

1.3 The between-laboratory reproducibility of this test method is being determined and will be available on or before June 2012. Therefore, this test method should not be used for acceptance or rejection of materials for purchasing purposes.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

bituminous mixture; complex shear modulus; DSR; dynamic shear rheometer; torsion rectangular specimen

ICS Code

ICS Number Code 75.140 (Waxes, bituminous materials and other petroleum products)

DOI: 10.1520/D7552-09

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Summary of Test Method Significance and Use
3	FIG. 1 FIG. 2
4	Interferences Apparatus FIG. 3
5	Materials Verification and Calibration
6	Preparation of Apparatus Preparing Test Specimens
7	Procedure
8	Interpretation of Results Report Precision and Bias FIG. 4
9	FIG. 5 FIG. 6
10	FIG. 7 TABLE 2
11	Keywords

Additional information

Standard Title	D7552-09 Standard Test Method for Determining the Complex Shear Modulus (G*) Of Bituminous Mixtures Using Dynamic Shear Rheometer
Published Code	ASTM
Publication Date	2009
Pages Count	11