Tensile Properties of an Engineered Cementitious Composite Shotcrete Mix

Results are presented for a series of laboratory tests that were undertaken to characterize the tensile properties of an engineered cementitious composite (ECC) mix, which is a mortar-based composite reinforced with synthetic fibers to provide tensile strain-hardening characteristics. Dogbone-, rectangular-, and circular-bar-shaped specimens were developed to determine the most suitable specimen geometry for uniaxial tensile testing (UTT), with the circular-bar specimens that were constructed by coring through sprayed ECC panels showing the best geometrical consistency, both within each specimen and between individual specimens. Fifty circular-bar specimens with a diameter of 16 mm and a length of 200 mm were tested under uniaxial tension to determine the characteristic tensile properties. Statistical distributions were used to define a 5% characteristic tensile yield strength of 1.82 MPa and a 10% tensile total strain of 0.08%. A material ductility factor of 4.0 was determined, and k factors are proposed to convert quality assurance test mean values to characteristic values.

Language

  • English

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Filing Info

  • Accession Number: 01539100
  • Record Type: Publication
  • Files: TRIS, ASCE
  • Created Date: Sep 2 2014 3:01PM