Structural characteristics of soil-rock mixtures based on electrochemical impedance spectroscopy

Dong, Hui; Zhu, Xiao; Jiang, Xiuzi; Chen, Li; Gao, Qian-Feng

doi:10.1016/j.catena.2021.105579

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…Electrochemical impedance spectrometry (EIS) is a detection technique to evaluate the internal structure of a sample based on disturbance feedback detection after the electric field disturbance is applied to the specimen [20]. The relevant information about the interface properties can be obtained, which has good applicability to the detection of the internal microscopic structure of the soil-rock mixture.…”

Section: Electrochemical Test and Uniaxial Compression Testmentioning

confidence: 99%

Experimental Study on Macroscopic Mechanical Characteristics and Microscopic Pore Structure Evolution of Soil–Rock Mixture under Repeated Freeze–Thaw Cycles

Deng,

Zhao,

Xiao

et al. 2023

Applied Sciences

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The response characteristics of the mesostructure and macro-characteristics of the soil–rock mixture under repeated freeze–thaw action have an important influence on the safety and stability of the dump slope in low-temperature environments. In order to further understand the multi-scale response behavior of a soil–rock mixture under freeze–thaw cycles, this paper carried out indoor freeze–thaw cycles, uniaxial compression, and electrochemical impedance spectroscopy tests on a soil–rock mixture taken from a graphite mine dump in Jixi City, Heilongjiang Province, China. Combined with the simulation calculation of discrete element numerical software (PFC2D 7.0), the effects of freeze–thaw cycling on electrochemical impedance spectrometry (EIS) mesoscopic parameters, uniaxial compressive strength, and crack propagation of soil–rock mixtures were analyzed. The intrinsic relationship between mesoparameters and macroscopic mechanical properties was established. The results showed that as the number of freeze–thaw cycles increases from 0 to 15, the mesopores inside the soil–rock mixture gradually increase, and the angular similarity of distribution characteristics increases by 5.25%. The uniaxial compressive strength and the peak secant modulus increase exponentially with the increase in the number of freeze–thaw cycles, the uniaxial compressive strength decreases by 47.62%, and the peak secant modulus decreases by 75.87%. The peak strain and pore compaction stage showed an exponential increase and an increasing trend, respectively, and the peak strain increased from 2.115% to 4.608%. The failure mode was basically similar in different cycles; the failure cracks extended from the corners to the middle and lower parts before the failure finally occurred. The types of failure cracks were mainly tensile cracks, followed by tensile shear cracks and the fewest compression shear cracks. The similarity and uniaxial compressive strength conformed to a good linear relationship with the number of freeze–thaw cycles, with the uniaxial compressive strength decreasing linearly with the increase in similarity.

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Section: Electrochemical Test and Uniaxial Compression Testmentioning

confidence: 99%

Experimental Study on Macroscopic Mechanical Characteristics and Microscopic Pore Structure Evolution of Soil–Rock Mixture under Repeated Freeze–Thaw Cycles

Deng,

Zhao,

Xiao

et al. 2023

Applied Sciences

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show abstract

“…At present, some scholars have studied the AC characteristics of soil, Han [17] proposed an integrated equivalent circuit model and impedance formula for sandy soils, based on three different kinds of conductive paths in microstructure of soil and theory of electrochemical impedance spectroscopy. Hui Dong [18] illustrated the structural characteristics of soil-rock mixtures, aiming at deducing the relationship between physical property indices based on the three-level equivalent circuit. However, the electrical conductivity mechanism of the soil and the specific physical meaning contained in the circuit component parameters have not been explained in detail.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental bases for the equivalent circuit model for interpretation of silty soil at different temperatures

Sun¹,

Chen²,

Bai³

et al. 2023

Heliyon

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Strength mechanism and electrochemical characterization of cement-bonded calcareous sand in different water environments

Wang

Cao

Xu³

et al. 2023

Construction and Building Materials

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Structural characteristics of soil-rock mixtures based on electrochemical impedance spectroscopy

Cited by 9 publications

References 41 publications

Experimental Study on Macroscopic Mechanical Characteristics and Microscopic Pore Structure Evolution of Soil–Rock Mixture under Repeated Freeze–Thaw Cycles

Experimental Study on Macroscopic Mechanical Characteristics and Microscopic Pore Structure Evolution of Soil–Rock Mixture under Repeated Freeze–Thaw Cycles

Theoretical and experimental bases for the equivalent circuit model for interpretation of silty soil at different temperatures

Strength mechanism and electrochemical characterization of cement-bonded calcareous sand in different water environments

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