The thermal damaging process of diorite under microwave irradiation

Xirui Lu; Chen Yuan; Zeng Junsen; Hu Qijun; Shao Dadong; Zhang Haibin; Lu Xirui

doi:10.3221/IGF-ESIS.47.06

The thermal damaging process of diorite under microwave irradiation

Authors

Xirui Lu State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology,
Chen Yuan School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Zeng Junsen School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Hu Qijun School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China
Shao Dadong School of environmental and biological engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Zhang Haibin Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
Lu Xirui State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China

DOI:

https://doi.org/10.3221/IGF-ESIS.47.06

Keywords:

Microwave heating, Thermal damage, Diorite, Rock breakage

Abstract

Laboratory tests have been conducted to investigate the effects of thermal damage on diorite under microwave irradiation. The sample rocks were heated to high temperature range of 300 to 800 ℃ in a single-mode microwave furnace. The experimental results show that the rocks started to crack at 500 ℃ and completely disintegrated at 700 ℃. The intensities of quartz diffraction peaks were almost unchanged while the diffraction peak intensity of hornblende gradually decreased with temperature increasing. In addition, the chlorite diffraction peak disappeared at 500 ℃. The compressive strength of the sample decreased to 40% at 600 ℃ and it approached zero at 700 ℃. In this paper, the possible reasons for the thermal effects on the fracture of diorite were discussed, which can be related to water evaporation, thermal cracks and mismatch thermal expansion, and phase transition on quartz. The result indicates that diorite can be effectively destroyed under microwave irradiation.

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Published

01-12-2018

Issue

Vol. 13 No. 47 (2019): January 2019

Section

Miscellanea

License

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

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How to Cite

The thermal damaging process of diorite under microwave irradiation. (2018). Frattura Ed Integrità Strutturale, 13(47), 65-73. https://doi.org/10.3221/IGF-ESIS.47.06