ASTM D7312 - 10

    Standard Test Method for Determining the Permanent Shear Strain and Complex Shear Modulus of Asphalt Mixtures Using the Superpave Shear Tester (SST)

    Active Standard ASTM D7312 | Developed by Subcommittee: D04.26

    Book of Standards Volume: 04.03


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    ASTM D7312

    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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D75 Practice for Sampling Aggregates

    D140 Practice for Sampling Bituminous Materials

    D979 Practice for Sampling Bituminous Paving Mixtures

    D2041 Test Method for Theoretical Maximum Specific Gravity and Density of Bituminous Paving Mixtures

    D2726 Test Method for Bulk Specific Gravity and Density of Non-Absorptive Compacted Bituminous Mixtures

    D3203 Test Method for Percent Air Voids in Compacted Dense and Open Bituminous Paving Mixtures

    D3549 Test Method for Thickness or Height of Compacted Bituminous Paving Mixture Specimens

    D5361 Practice for Sampling Compacted Bituminous Mixtures for Laboratory Testing

    D6752 Test Method for Bulk Specific Gravity and Density of Compacted Bituminous Mixtures Using Automatic Vacuum Sealing Method

    D6857 Test Method for Maximum Specific Gravity and Density of Bituminous Paving Mixtures Using Automatic Vacuum Sealing Method

    D6925 Test Method for Preparation and Determination of the Relative Density of Hot Mix Asphalt (HMA) Specimens by Means of the Superpave Gyratory Compactor

    E1 Specification for ASTM Liquid-in-Glass Thermometers

    E4 Practices for Force Verification of Testing Machines

    AASHTO Standards

    AASHTOR30 Short and Long Term Aging of Hot Mix Asphalt (HMA)


    ICS Code

    ICS Number Code 93.080.20 (Road construction materials)

    UNSPSC Code

    UNSPSC Code 30121600(Asphalts); 41110000(Measuring and observing and testing instruments)


    DOI: 10.1520/D7312-10

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    ASTM D7312

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