Improvement of the biaxial flexure test method for concrete

Jihwan Kim, Dong Joo Kim, Goangseup Zi

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


The biaxial flexure test (BFT) method for the biaxial tensile strength of concrete has been improved. To ensure the equi-biaxial stress condition during the test, the geometry of the specimen, proper treatment of the specimen surface, and the support conditions were proposed. The biaxial flexural strength of concrete was measured with the improved biaxial flexure test method. The coefficient of variation (c.o.v) of the biaxial flexure test method is comparable to that of the four-point bending test and ASTM C 1550. The improved biaxial flexure test provides a practical and reliable means of determining the biaxial flexural strength of concrete. The biaxial tensile strength given by the biaxial flexure test method and the ASTM C 1550 method is greater than the uniaxial tensile strength using the four-point bending test method.

Original languageEnglish
Pages (from-to)154-160
Number of pages7
JournalCement and Concrete Composites
Issue number1
Publication statusPublished - 2013 Mar

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science and Technology (2011-0003166).


  • Bending test
  • Biaxial flexural strength
  • Biaxial flexure test (BFT)
  • Biaxial stress state
  • Tensile strength

ASJC Scopus subject areas

  • Building and Construction
  • General Materials Science


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