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    Pullout Strength of Concrete

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    A proposed method of nondestructive testing for pullout strength of hardened concrete is under consideration by the American Society for Testing and Materials' Committee C-9 on Concrete and Concrete Aggregates. Interest in the method is due to current emphasis on construction safety and recognition that strength of concrete should be measured in structures to determine in-place, load-bearing capacity. The pullout test measures the force required to pull an embedded anchor and accompanying small cone of concrete out of the mass tested. This force is divided by the area of conic fracture to give the pullout strength, which is directly related to other strength measurements to the extent that test masses and curing are comparable. The pullout can be used in the moist room of the standard potential strength cylinder but, more importantly, where potential strength may not apply: in field tests of in-place, load-bearing performance.


    mechanical tests, compressive strength, concretes, cores, formwork, mechanical properties, load control, nondestructive tests, penetration resistance, performance, resilience, safety

    Author Information:

    Richards, O
    Minerals consultant, The Plains, Va.

    Committee/Subcommittee: E28.08

    DOI: 10.1520/STP27081S