AASHTO T24

Full Name

AASHTO T24 – Standard Method of Test for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

Scope

AASHTO T24 is a standard test method used to obtain, prepare, and test cores drilled from hardened concrete for length and compressive strength determination. It also covers the preparation and testing of beams sawed from concrete for flexural strength determination. This standard is essential for assessing the quality and in-place strength of concrete in existing structures, such as pavements, bridges, and buildings.

Key aspects of AASHTO T24:

  • Scope:
    • Obtaining cores and beams from hardened concrete.
    • Preparing cores for testing (end preparation, moisture conditioning).
    • Testing cores for length and compressive strength.
    • Preparing beams for testing (dimensioning, moisture conditioning).
    • Testing beams for flexural strength.
  • Significance:
    • Quality assurance: T24 ensures the accuracy and reliability of test results, crucial for verifying the concrete’s in-place properties and its compliance with project specifications.
    • Performance assessment: the test results provide valuable information on the concrete’s compressive and flexural strength, which are critical for evaluating its structural integrity and performance.
    • Non-destructive evaluation: core drilling is a minimally invasive method for assessing the in-place properties of concrete without causing significant damage to the structure.
  • Test procedures:
    • Core drilling: outlines the procedures for drilling cores from concrete structures, including drilling locations, core diameters, and drilling techniques.
    • Core preparation: specifies the methods for preparing the core ends for testing, including sawing or grinding to achieve flat and parallel surfaces.
    • Core testing: details the procedures for testing the cores for length and compressive strength, including loading rates and failure criteria.
    • Beam preparation: describes the methods for preparing sawed beams for flexural strength testing, including dimensioning and moisture conditioning.
    • Beam testing: outlines the procedures for testing the beams in flexure, including loading configurations, support conditions, and deflection measurement.

AASHTO T24 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing tests using the AASHTO T24 standard.

Our laboratory offers comprehensive concrete testing services, including core drilling, beam sawing, and testing according to AASHTO T24. Our experienced technicians utilize modern equipment and adhere to strict quality control procedures to provide accurate and reliable test results for your construction projects.

Contact us for more information.

Resources

Keywords

concrete core; sawed beam; compressive strength; flexural strength; drilling; sawing; core diameter; moisture conditioning; capping; testing machine

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