Tensile Properties of Early-Age Concrete

Very early age concrete tensile properties and their measurements are reviewed in this paper, which also clearly highlights the need for further study. The authors report on a newly developed apparatus and procedures for concrete specimen uniaxial direct tensile testing at 1.5 or more hours of age after mixing, together with experimental results obtained. The authors present an improved knowledge of various early age properties deemed important. During the first three hours or so, the early age concrete tensile strength, Young's modulus, and fracture energy are all found to increase very slowly, but thereafter they increase significantly. These three parameters show strong correlations, especially between tensile strength and fracture energy. The high fracture energy values obtained strongly suggest that early age concrete cracking involves significant plastic straining or microcracking zone in the vicinity of the crack tip. In comparision with mature concrete, early age concrete is also shown to be more ductile.

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  • Authors:
    • Dao, Vinh T N
    • Dux, Peter F
    • Morris, Peter H
  • Publication Date: 2009

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01150698
  • Record Type: Publication
  • Report/Paper Numbers: 106-M53
  • Files: TRIS
  • Created Date: Feb 13 2010 11:31AM