ASTM D7312-10 - 1.12.2010
 
Significance and Use

The test procedures and associated analysis techniques described in this method can be used to determine complex shear modulus and permanent shear strain of asphalt mixtures. The shear frequency sweep test at constant height can be used to determine the complex shear modulus of a mixture. The repeated shear test at constant height can be used to determine permanent shear strain under repeated loading.

Note 4—The complex shear modulus is used to characterize the shear behavior of the mixture, and the permanent shear strain relates to pavement rutting.

 
1. Scope

1.1 This standard provides performance-related test procedures for the determination of stiffness complex shear modulus and permanent shear strain of asphalt mixtures using the Superpave Shear Tester (SST). This standard is applicable to the testing and analysis of modified and unmodified asphalt mixtures.

1.2 This standard is applicable to specimens prepared in a laboratory or cored from a pavement for post-construction analysis. It is intended for use with specimens having the following minimum dimensions:

 
2. Referenced Documents

D979-01

Standard Practice for Sampling Bituminous Paving Mixtures

D2041-03

Standard Test Method for Theoretical Maximum Specific Gravity and Density of Bituminous Paving Mixtures

D2726-11

Standard Test Method for Bulk Specific Gravity and Density of Non-Absorptive Compacted Bituminous Mixtures

D3203-22

Standard Test Method for Percent Air Voids in Compacted Asphalt Mixtures

D3549-03

Standard Test Method for Thickness or Height of Compacted Bituminous Paving Mixture Specimens

D5361-06

Standard Practice for Sampling Compacted Bituminous Mixtures for Laboratory Testing

D6752-09

Standard Test Method for Bulk Specific Gravity and Density of Compacted Bituminous Mixtures Using Automatic Vacuum Sealing Method

D6857-09

Standard Test Method for Maximum Specific Gravity and Density of Bituminous Paving Mixtures Using Automatic Vacuum Sealing Method

D6925-23

Standard Test Method for Preparation and Determination of the Relative Density of Asphalt Mix Specimens by Means of the Superpave Gyratory Compactor

E1-14(2025)

Standard Specification for ASTM Liquid-in-Glass Thermometers

E4-24

Standard Practices for Force Calibration and Verification of Testing Machines

AASHTO R30

Short and Long Term Aging of Hot Mix Asphalt (HMA)

D75-03

Standard Practice for Sampling Aggregates

D140-01

Standard Practice for Sampling Bituminous Materials