Structural failure process of schistosity rock under microwave radiation at high temperatures

Leping He; Yucheng Gu; Qijun Hu; Yuan Chen; Junsen Zeng

doi:10.3221/IGF-ESIS.50.55

Structural failure process of schistosity rock under microwave radiation at high temperatures

Authors

Leping He School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Yucheng Gu Southwest Petroleum University
Qijun Hu School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Yuan Chen School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Junsen Zeng School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China

DOI:

https://doi.org/10.3221/IGF-ESIS.50.55

Keywords:

Microwave radiation, Schistose granite, High temperature, Thermal damage

Abstract

The effects of high temperature induced by microwave radiation on the schistosity structural rock were investigated. A 1.45 kW commercial microwave system was employed to irradiate specimens to a designed temperature (300–800 °C) for 15 minutes. Cracking and local melting initially appeared in the biotite enrichment area at 500 °C. Macro-cracks in the dark area were parallel to the schistosity trend, owing to the weak connection in a direction perpendicular to the schistosity plane. The composition of the rock did not significantly change before and after microwave radiation. The diffraction peak intensity of the biotite decreased with temperature increase, owing to melting. The average peak stress decreased significantly with increasing temperature. It is concluded that the high temperature induced by microwave radiation promotes hard rock breakage and the schistosity structure of rock significantly affects the cracking pattern.

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Published

14-09-2019

Issue

Vol. 13 No. 50 (2019): October 2019

Section

SI: Structural Integrity and Safety: Experimental and Numerical Perspectives

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Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

Structural failure process of schistosity rock under microwave radiation at high temperatures. (2019). Frattura Ed Integrità Strutturale, 13(50), 649-657. https://doi.org/10.3221/IGF-ESIS.50.55