On the Experimental Determination of Concrete Compressive and Tensile Strengths

Autores

  • Claudia Alejandra Morel Facultad de Ingeniería - Universidad Nacional del Nordeste
  • Ignacio Iturrioz Universidade Federal do Rio Grande do Sul (UFRGS)
  • Jorge Daniel Riera Universidade Federal do Rio Grande do Sul (UFRGS)

Palavras-chave:

compressive strength, testing, apparatus & methods, Discrete-element modelling, Constitutive relations

Resumo

For design purposes, before failure, concrete is often modelled as a linearly elastic, isotropic, and homogeneous material. DIN codes initially used cubic samples to assess uniaxial compressive strength, but friction effects along loading plates led to their replacement by cylinders. Evidence that strength varies with the casting direction raised doubts about the implicit isotropy assumption. Measurement of the compressive strength in vertical and horizontal directions requires properly supported cubic samples. As an anti-friction layer, grease performed better than other alternatives and was chosen for discrete element method (DEM) simulations of experimental results. Cubic specimens provided with grease led to nearly the same compressive strength as cylinders or prisms, determining the casting direction's influence. DEM simulations also suggest that cubic samples can replace conventional splitting tensile strength tests, providing tensile strength data in both directions.

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Biografia do Autor

Ignacio Iturrioz, Universidade Federal do Rio Grande do Sul (UFRGS)

  • CEng, MSc, PhD
  • Professor, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil

Jorge Daniel Riera, Universidade Federal do Rio Grande do Sul (UFRGS)

  • CEng, MSc, PhD, Member ABC, ANE (Brasil)
  • Emeritus Professor, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil

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Publicado

2025-03-21