›› 2006, Vol. 27 ›› Issue (S1): 539-543.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Brazilian and axial tensile strengths of rocks and rock-like materials

YU Xian-bin1, WANG Qing-rong2, SONG Zhan-ping3, XIE Qiang4   

  1. 1. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. Faculty of Communication Engineering, Kunming University of Science and Technology, Kunming 650093, China; 3. Faculty of Civil Engineering, Xi’an Sci-Tech University of Architecture, Xi’an 710055, China; 4. Faculty of Civil Engineering, Chongqing University, Chongqing 400045, China
  • Received:2006-05-25 Published:2006-12-15

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Abstract: Brazilian and axial tension tests were carried out with 7 rock types and 2 groups of concrete samples, with a test apparatus of direct tension developed by the authors. The result shown that the strengths of Brazilian tests, SB, were greater than the strengths of direct tension, ST, for all rock (concrete) types tested, with the ratio of SB/ST varies among 1.06 and 1.97. The Coefficients of variation of the tested data from direct tension were generally greater than those from Brazilian tests. Corrections on strength values of Brazilian tests were performed following the research results of Sundaram et al. (1980) for the rock types having Young’s modulus in tension, ET, much smaller than the modulus in compression, EC. This makes the SB/ST ratio smaller and shown that the difference between ET and EC was one of the reasons of making SB greater than SC. However, it can also be concluded that, the difference between ET and EC was not the only reason of making SB/ST difference, since the SB/ST ratios for some of the tested rock types were the largest ones while their differences between ET and EC were smaller.

Key words: rock, direct tension, Brazilian test, strength

CLC Number: 

  • TU 45
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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