Effect of Saturation on Fracture Toughness of Granite in Real-time Low Temperature Conditions

YANG Ke; ZHANG Fan

doi:10.13204/j.gyjzG21112907

Volume 53 Issue 1

Jan. 2023

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Sun Fengming. TRIALS OF DEVELOPING GREEN AND ENERGY-SAVING COMMUNITY[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(2): 16-17,21. doi: 10.13204/j.gyjz200402006

Citation:

YANG Ke, ZHANG Fan. Effect of Saturation on Fracture Toughness of Granite in Real-time Low Temperature Conditions[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(1): 189-193. doi: 10.13204/j.gyjzG21112907

Sun Fengming. TRIALS OF DEVELOPING GREEN AND ENERGY-SAVING COMMUNITY[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(2): 16-17,21. doi: 10.13204/j.gyjz200402006

Citation:

YANG Ke, ZHANG Fan. Effect of Saturation on Fracture Toughness of Granite in Real-time Low Temperature Conditions[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(1): 189-193. doi: 10.13204/j.gyjzG21112907

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Effect of Saturation on Fracture Toughness of Granite in Real-time Low Temperature Conditions

doi: 10.13204/j.gyjzG21112907

YANG Ke,
ZHANG Fan^,

School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China

Received Date: 2021-11-29
Available Online: 2023-05-25
Publish Date: 2023-01-20

Abstract

Abstract

To study the fracture toughness of rocks at low temperature is of great significances for evaluating the stability of underground chamber storage structures for liquefied natural gas (LNG). The effects of real-time low temperatures (-60, -40, -20, 0 and 25 ℃) on the fracture toughness of granite mode I in dry and saturated state were researched by the semi-circular bending (SCB) method, and the microcracks of specimens were analyzed by scanning electron microscopy (SEM). The results showed that the fracture toughness of both dry and saturated granite increased with decrease of temperatures. Below 0 ℃, the fracture toughness of the saturated state was significantly greater than that in the dry state. The initial compaction stage of dry specimens decreased with decrease of temperatures, while the peak displacement was almost unchanged. Both the initial compaction stage and the peak displacements of saturated specimens increased with decrease of temperatures. At -60 ℃, the microcracks inside the granite increased significantly resulting in a slower growth of fracture toughness.
- granite,
- fracture toughness,
- real-time low temperature,
- dry,
- saturation

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References(21)

References

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