| Title |
The Improvement of Biaxial Flexure lest (BFT) Method for Determination of the Biaxial Flexure Tensile Strength of Concrete |
| Keywords |
tensile strength" biaxial flexure strength;biaxial flexure test;isotropic flexure stress;bending test;인장강도;이방향 휨강도;이방향 휨인장강도 시험;등방성 휨인장응력;휨시험 |
| Abstract |
In this study, an experiment for the biaxial behavior of specimens was carried out to identify whether the isotropic flexure tensile stress of concrete in the BFT method is feasible. Another experiment for the improvement of the BFT method was conducted to ensure the isotropic flexure tensile stress of BFT specimens during the test. In addition, the biaxial flexure strength of concrete given by the improved BFT method was compared to the uniaxial flexure strength by the four-point bending test. Test results show that the isotropic flexure tensile stress of concrete using the BFT method was highly influenced by the surface conditions and warping of the specimens. Using improved BFT method, we could obtained the isotropic flexure tensile stress of concretes. The biaxial flexure strength of BFT was about 32% greater than the uniaxial flexure strength of the four-point bending test. In the experiment, with the smaller scatter, the improved BFT method gave a reliable biaxial flexure strength like the four-point bending test. |