›› 2016, Vol. 37 ›› Issue (2): 367-375.doi: 10.16285/j.rsm.2016.02.008

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of mechanical and wave properties of heat-treated marble by water cooling

HUANG Zhen-ping1, 2, ZHANG Yi1, 2, WU Wei-da1, 2   

  1. 1. College of Environment and Resources, Fuzhou University, Fuzhou, Fujian 350108, China; 2. Institute of Geotechnical and Geological Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
  • Received:2015-08-03 Online:2016-02-11 Published:2018-06-09
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (41272300) and the Research Project from Ministry of Transport of China (201331849A130).

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Abstract: Mechanical properties of heat-treated rock after the cooling treatment directly influence the exploration and development of underground space and resources, storage of nuclear waste and stability evaluation of underground engineering after the high temperature disaster. Uniaxial compression and acoustic wave tests were conducted on heat-treated marble samples under the conditions of natural cooling and water cooling. Then, the variations of peak strength, elastic modulus, attenuation coefficient, longitudinal wave velocity and dominant frequency under different conditions were analyzed. A decrease trend is noted in peak strength, elastic modulus and longitudinal wave velocity of heat-treated marble by water cooling with the increase of treated temperature. When the temperature is lower than 400 ℃, the attenuation coefficient gradually increases and the dominant frequency gradually declines with the increase of temperature. When the temperature is higher than 400 ℃, the attenuation coefficient and dominant frequency do not completely exhibit monotonically increasing or decreasing trend, though there is a turning point. The peak strength, elastic modulus and dominant frequency of heat-treated marble samples after water cooling are lower than those after natural cooling, but the longitudinal wave velocity and attenuation coefficient are opposite. These results can provide references for the engineering health monitoring and stability evaluation of cooling methods on heat-treated rocks.

Key words: heat-treated rock, water cooling, natural cooling, peak strength, elastic modulus, longitudinal wave velocity

CLC Number: 

  • TU 458

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