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http://dx.doi.org/10.12652/Ksce.2011.31.5A.389

The Improvement of Biaxial Flexure Test (BFT) Method for Determination of the Biaxial Flexure Tensile Strength of Concrete  

Kim, Jihwan (고려대학교 건축.사회환경공학과)
Zi, Goangseup (고려대학교 건축.사회환경공학과)
Oh, Hongseob (경남과학기술대학교 토목공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.31, no.5A, 2011 , pp. 389-397 More about this Journal
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.
Keywords
tensile strength; biaxial flexure strength; biaxial flexure test; isotropic flexure stress; bending test;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 기술표준원(1964) KS F 2405 콘크리트의 압축 강도 시험방법.
2 기술표준원(2000) KS F 2408 콘크리트 휨 강도 시험방법.
3 기술표준원(2005) KS F 2403 콘크리트의 강도 시험용 공시체 제작방법.
4 오홍섭, 지광습(2008) 일축 및 이축 휨인장강도의 실험적 비교, 한국콘크리트학회논문집, 한국콘크리트학회, 제20권 제2호, pp. 139-146.
5 오홍섭, 지광습(2010) 최적실험체 제원에 의한 콘크리트의 일축 및 이축 휨인장강도, 대한토목학회논문집, 대한토목학회, 제30권 제2A호, pp. 185-191.
6 지광습, 오홍섭, 최진혁(2007) 콘크리트의 순수 등방성 휨인 장강도 시험법, 대한토목학회논문집, 대한토목학회, 제27권 제5A호, pp. 753-758.
7 지광습, 김지환, 오홍섭(2009) 최적 시험체 형상을 고려한 개선된 콘크리트 등방휨인장강도 시험법, 한국콘크리트학회논문집, 한국콘크리트학회, 제21권 제4호, pp. 523-530.
8 Ban, S. and Anusavice, K.J. (1990) Influence of test method on failure stress of brittle dental materials, Journal of Dental Research 69, pp. 1791-1799.   DOI   ScienceOn
9 Fessler, H. and Fricker, D.C. (1984) A theoretical analysis of the ring-on-ring loading disk test, J. Am. Ceram. Soc., Vol. 67, pp. 582-588.   DOI   ScienceOn
10 Higgs, W.A.J., Lucksanasombool, P., Higgs, R.J.E.D., and Swain, M.V. (2001) Evaluating acrylic and glass-ionomer cement strength using the biaxial flexure test, Biometerials, Vol. 22, pp. 1583-1590.   DOI   ScienceOn
11 Marshall, D.B. (1980) An improved biaxial flexure test for ceramics, American Ceramics Society Bulletin 59, pp. 551-553.
12 Raphael, J.M. (1984) Tensile strength of concrete, ACI J., Title No. 81-17, pp. 158-165.
13 Ritter J.E., Jakus, K., Batakis, A., and Bandyopadhyay, N. (1980) Appraisal of biaxial strength testing, J Non-Cryst Solids 38-39, pp. 419-424.   DOI
14 Russell, Paul Patrick (1991) Processing studies of Macro-Defect- Free cement and investigation of chemical modifiers to improve the water resistance of the composite, MSc Thesis, University of Illinois at Urbana-Champaign, Illinois.
15 Soltesz, U., Richter, H., and Kiezler, R. (1986) Proceedings of Conference Ceramics in Clinical Applications, Elsevier, Milan.
16 Westergaard, H.M. (1947) New formulas for stresses in concrete pavements of airfields, ASCE Proceedings, pp. 425-439.
17 Standard ISO 6474 (1994) Implants for surgery-ceramic materials based on high purity alumina.
18 Timoshenko, S.P. and Woinowsky-Krieger, S. (1959) Theory of Plates and Shells, 2nd Edition, McGraw-Hill, New York.
19 Vitman, F.F. and Pukh, V.P. (1963) A method for determining the strength of sheet glass, Zavodskaya Laboratoriya 29, pp. 863-867.
20 Westergaard, H.M. (1933) Analytical tools for judging results of structural tests of concrete pavements, Public Roads, Vol. 14 (10), pp. 185-88.
21 Westergaard H.M. (1926) Stresses in concrete pavements computed by theoretical analysis, Public Roads, Vol. 7, pp. 25-35.
22 Zi, G., Oh, H., and Park, S.-K. (2008) A novel indirect tensile test method to measure the biaxial tensile strength of concretes and other quasibrittle materials, Cement and Concrete Research, Vol. 38, No. 6, pp. 751-756.   DOI   ScienceOn