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Experimental Study of Thermal Expansion Characteristics of Coaly Mudstone at High Temperatures

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Abstract

This study investigated the thermal expansion characteristics of coaly mudstone specimens at temperatures ranging from room temperature up to 800 °C. The experiments were performed by an MTS810 electro-hydraulic servo system and an MTS653.02 high-temperature furnace. Results revealed that mudstone experienced thermal expansion at high temperature, and that the relationship curve between thermal expansion strain and testing time could be divided into three stages. With increasing temperature, mudstone’s thermal strain and expansion coefficient exhibited an upward trend. With 400 °C as the critical temperature, the curve could be divided into (1) rapid increase stage, (2) flat stage, and (3) rapid increase stage. The major causes behind thermal expansion are changes in internal pores and fissure, as well as the thermochemistry effect of mineral components.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 51104128); 333 Project Program of Jiangsu Province of China (BRA2015065).

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Authors and Affiliations

  1. Civil Engineering Department, Xuzhou Institute of Technology, Xuzhou, 221008, China

    Lianying Zhang & Ruixue Liu

  2. State Key Laboratory of Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221008, China

    Lianying Zhang, Xianbiao Mao, Ming Li & Ruixue Liu

  3. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221008, China

    Xianbiao Mao & Ming Li

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  1. Lianying Zhang
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  2. Xianbiao Mao
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  3. Ming Li
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  4. Ruixue Liu
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Correspondence to Lianying Zhang.

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Zhang, L., Mao, X., Li, M. et al. Experimental Study of Thermal Expansion Characteristics of Coaly Mudstone at High Temperatures. Geotech Geol Eng 36, 521–529 (2018). https://doi.org/10.1007/s10706-017-0344-3

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  • DOI: https://doi.org/10.1007/s10706-017-0344-3

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