CRITICAL NORMAL FRACTURE STRAIN OF PLAIN AND STEEL WIRE FIBROUS- REINFORCED CONCRETE

Abstract

The report presents the results of a series of eighty-one impact tests performed on 5.1 x 88.9-cm (2.0 x 35.0-in.) cylindrical test specimens. The cylinders consisted of either plain or steel wire fibrous-reinforced concrete. Basic properties relating to the concrete test specimens used were quantitatively evaluated: static ultimate tensile strength and the corresponding ultimate tensile strain; static initial Young's modulus of elasticity; static ultimate unconfined compressive strength, specific gravity, mass density; seismic velocity; dynamic Young's modulus of elasticity. Histograms for the frequency distributions of basic material properties show variations of these properties within the experiment. The results revealed that the critical normal fracture strain (critical value of tensile strain which causes fracture of the material) of the materials tested is functionally dependent on the rise times of the straining pulse. The results also showed that the critical normal fracture strain of plain concrete can be increased by the inclusion of the randomly placed steel wire fibre of the type tested.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1969
Accession Number
AD0695719

Entities

People

  • Donald L. Birkimer

Organizations

  • Construction Engineering Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Compressive Strength
  • Construction
  • Elastic Properties
  • Engineering
  • Engineers
  • Frequency
  • Impact Tests
  • Materials
  • Measurement
  • Modulus Of Elasticity
  • Physical Properties
  • Portland Cement
  • Seismic Velocity
  • Specific Gravity
  • Tensile Strain
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.