Tao Luo
Pore water pressureLiquid nitrogenGeothermal gradientUltimate tensile strengthDigital image correlationDeformation (engineering)PermafrostShearing (physics)Soil scienceSoil waterComposite materialAcoustic emissionMoistureCompression (physics)Materials sciencePenetration depthWater contentSofteningCompressive strengthFracture (geology)MicrowaveFrost (temperature)Soil testPorosityStress (mechanics)Fracture toughness
Publications 4
#1Zhenlong Ge (Xi'an University of Science and Technology)H-Index: 1
#2Qiang Sun (Xi'an University of Science and Technology)H-Index: 5
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Abstract null null Liquid nitrogen (LN2) ultra-low temperature fracturing technology has broad application prospects in the storage and transformation of geothermal wells. Therefore, it is of great significance to investigate the fracture toughness of granite samples after elevated temperature treatment and LN2 cooling. In this paper, the Cracked Straight Through Brazilian Disc (CSTBD) granite specimen was heat-treated at different temperatures to study the mode-I fracture toughness of granite a...
Water-bearing porous rocks can be greatly strengthened by freezing; its microscopic mechanisms lie in how subzero temperature modifies pore structure but have not yet been clearly defined. In this study, we link the mechanical properties of frozen sandstone to phase composition of pore water (i.e., relative amount of unfrozen water and ice). Both the strength (uniaxial compressive strength and tensile strength) and the phase composition of pore water (tested through the nuclear magnetic resonanc...
#1Hailiang Jia (Xi'an University of Science and Technology)H-Index: 7
#2Ting Wang (Xi'an University of Science and Technology)
Last. Qiang Sun (Xi'an University of Science and Technology)H-Index: 3
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Abstract Engineering activities are becoming increasingly frequent in seasonally frozen and permafrost regions. Artificially thawing frozen soil before excavation may significantly increase the efficiency of excavation and reduce cost. Microwave irradiation can thaw frozen soil very rapidly, but has not yet been widely used in the field. One important reason is that the mechanisms of thawing and softening of frozen soil by microwave irradiation are not fully understood yet, therefore, the practi...
#1He Zhang (Xi'an University of Science and Technology)H-Index: 2
#2Qiang Sun (Xi'an University of Science and Technology)H-Index: 3
Last. Tao LuoH-Index: 1
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High temperatures affect the physical properties of red sandstone seriously, especially the pores. Understanding its mechanism is of great significance in coal mining following underground gasification, geothermal energy utilization, and the deep burial of nuclear waste. Nuclear magnetic resonance (NMR) was used to detect pore structure characteristics, and scanning electron microscopy (SEM) and polarizing light microscopy (PLM) were used to mechanism of change. The transverse relaxation time (T...
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