Properties of Concrete Change When Microcracking Occurs

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Title: Properties of Concrete Change When Microcracking Occurs

Author(s): J. Isenberg

Publication: Special Publication

Volume: 20

Issue:

Appears on pages(s): 29-42

Keywords:

Date: 1/1/1968

Abstract:
Fracture of plain concrete under biaxial tensile and compressive stress is investigated. The stress states at inception of microcracking, or discontinuity, and strength are found. Such properties as strength, stiffness and mode of breaking alter with the extent of microcracking in a specimen; the extent of microcracking depends on loading program. Explanations of fracture which overlook these subjects by considering only mean stress at breaking may be faulty. The curve of discontinuity is suggested as a simple, safe criterion of strength for some problems of engineering design.