Abstract
In this paper, the limestone specimens are heated from room temperature 25 to 800 °C in a high temperature furnace and then are subjected to Brazilian test with the AG-I250 electronic precision material testing machine. The physical properties, mechanical properties, disc failure pattern, energy absorbed per unit area and damage characteristics of disc are comprehensively investigated. The results show that: with the increase of temperature, the changing trends of tensile strength, peak strain, tensile modulus and accumulated energy absorbed per unit area of disc are similar, they are first increases, then decrease, the energy consumption index is consistent with the macroscopic damage characteristics; the value of εs increase first and then reduce, reaches the maximum at 600 °C. The value of n is increasing and fluctuating, but the change trend of Dc is opposite, which is decreasing and fluctuating. The slope of the damage variable-strain curves decreases first and then increases, the minimum value at 600 °C. This study is of significance to the prediction and evaluation of the stability and safety of rock mass post-high temperature.
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This research was funded by the National Science and Technology Major Project of China (2016ZX05045-004).
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Dongming Zhang had the original idea for this study, all co-authors were involved in data analytics work, as well as writing and revising all parts of this manuscript.
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Dongming, Z., Yushun, Y. The Effect of High Temperature on Tensile Strength and Damage Characteristics of Limestone. Geotech Geol Eng 36, 3527–3535 (2018). https://doi.org/10.1007/s10706-018-0552-5
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DOI: https://doi.org/10.1007/s10706-018-0552-5