CLC number: TU45
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2015-08-07
Cited: 6
Clicked: 5001
Jin Yu, Shao-jie Chen, Xu Chen, Ya-zhou Zhang, Yan-yan Cai. Experimental investigation on mechanical properties and permeability evolution of red sandstone after heat treatments[J]. Journal of Zhejiang University Science A, 2015, 16(9): 749-759.
@article{title="Experimental investigation on mechanical properties and permeability evolution of red sandstone after heat treatments",
author="Jin Yu, Shao-jie Chen, Xu Chen, Ya-zhou Zhang, Yan-yan Cai",
journal="Journal of Zhejiang University Science A",
volume="16",
number="9",
pages="749-759",
year="2015",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1400362"
}
%0 Journal Article
%T Experimental investigation on mechanical properties and permeability evolution of red sandstone after heat treatments
%A Jin Yu
%A Shao-jie Chen
%A Xu Chen
%A Ya-zhou Zhang
%A Yan-yan Cai
%J Journal of Zhejiang University SCIENCE A
%V 16
%N 9
%P 749-759
%@ 1673-565X
%D 2015
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1400362
TY - JOUR
T1 - Experimental investigation on mechanical properties and permeability evolution of red sandstone after heat treatments
A1 - Jin Yu
A1 - Shao-jie Chen
A1 - Xu Chen
A1 - Ya-zhou Zhang
A1 - Yan-yan Cai
J0 - Journal of Zhejiang University Science A
VL - 16
IS - 9
SP - 749
EP - 759
%@ 1673-565X
Y1 - 2015
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1400362
Abstract: triaxial compression tests were carried out on red sandstone samples which had been previously subjected to heat treatments at 20, 200, 400, and 600 °C to study the change in properties and mechanical characteristics of the rock and the permeability (gas) evolution. Results show that: (1) the color of the sandstone changes from gray to brownish red with incremental change of temperature; (2) the strength of the rock increases with heat treatments from 20 to 200 °C and decreases with heat treatments from 200 to 600 °C, while the permeability of the rock after the heat treatments changes in the opposite trend; (3) from 20 to 200 °C, the primary pores and cracks close gradually, which results in the strength and elastic modulus increasing and permeability of the rock after the heat treatment decreasing; from 200 to 600 °C, the degradation of the sandstone causes the fall in strength and elastic modulus, and the rise in strain corresponding to the peak stress and permeability of the rock after the heat treatment; (4) the permeability in a stress-strain process varies with the evolution of cracks; (5) when the heating temperature is beyond 800 °C, the sandstone is seriously thermally damaged.
Research on mechanical properties and permeability evolution of sandstone after heat treatment is important to some rock engineering applications such as sandstone reservoir, oil and gas enhanced recovery, underground coal gasification. This paper described experimental results of triaxial compression testing with gas permeability measurement on red sandstones after thermal treatment of 200, 400 and 600°C. The results are very interesting.
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