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Experimental Study on the Validity and Rationality of Four Brazilian Disc Tests

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Abstract

The validity and rationality of the Brazilian disc test have attracted much attention since it was proposed. To verify the validity of four Brazilian disc tests, red sandstone and yellow rust granite were employed. In these experiments, uniaxial tensile tests and four Brazilian disc tests were performed. Meanwhile, the typical location of the Brazilian discs was arranged with gages to detect the crack initiation location. By analyzing the rationality of the four Brazilian disc tests from two aspects, the crack initiation location and the difference between indirect tensile strength and direct tensile strength, it was found that the Brazilian disc tests without cushion and the Brazilian disc tests with two small-diameter steer rods are suitable for determining the indirect tensile strength of rock materials. However, the Brazilian disc tests with arc loading jaws should be carefully adopted to measure the indirect tensile strength due to their overestimation of the indirect tensile strength. Additionally, flattened Brazilian disc tests were found to be not suitable for measuring the indirect tensile strength of rock materials.

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Acknowledgements

This study was funded by the Open Research Fund Program of Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, the Hunan University of Science and Technology (Grant No. E21527), and the Fundamental Research Funds for the Central universities of Central South University (Grant No. 2015zzts077).

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Authors and Affiliations

  1. School of Resources and Safety Engineering, Central South University, Changsha, 410083, Hunan, China

    Min Wang & Ping Cao

  2. Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China

    Min Wang

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  1. Min Wang
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  2. Ping Cao
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Correspondence to Min Wang.

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Wang, M., Cao, P. Experimental Study on the Validity and Rationality of Four Brazilian Disc Tests. Geotech Geol Eng 36, 63–76 (2018). https://doi.org/10.1007/s10706-017-0302-0

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