Study on Physical Properties and Energy Evolution of Natural Gypsum Rock under Freeze-thaw Cycles

Shengzhu Wang; Jianyun Qin; Keke Zheng; Fajun Yang; Yang Zhang; Sijiang Wei; Dahua Ren

doi:10.54097/ije.v2i2.7772

Authors

Shengzhu Wang
Jianyun Qin
Keke Zheng
Fajun Yang
Yang Zhang
Sijiang Wei
Dahua Ren

DOI:

https://doi.org/10.54097/ije.v2i2.7772

Keywords:

Gypsum rock, Freeze-thaw cycle, Physical mechanics, Energy evolution

Abstract

The physical and mechanical properties, microstructure deterioration characteristics and damage mechanism of natural gypsum rock under freeze-thaw cycles were studied by using a self-developed programmed freeze-thaw experimental device, results showed: Compared with that before freeze-thaw, with the increase of freeze-thaw cycles, the surface dissolution of gypsum rock samples becomes more obvious, the longitudinal wave velocity decreases linearly, the uniaxial compressive strength and elastic modulus decrease exponentially, the compaction stage of stress-strain curve is significantly prolonged, and the plasticity of post-peak failure process is enhanced. With the increase of axial strain, the total input energy curve rises at a faster rate, and the elastic energy curve also rises, but the rising rate slows down significantly after the freeze-thaw cycle, and the dissipation energy curve gradually evolves from a smooth rise to an ' S ' type. The research results have reference significance for the construction scheme design and frost damage prevention of gypsum surrounding rock tunnels in cold regions.

Downloads

Download data is not yet available.

References

ZHANG Huimei, YANG Gengshe. Experimental study of damage deterioration and mechanical properties for freezing-thawing rock[J]. ournal of China Coal Society, 2013, 38(10): 1756-1762. (In Chinese)

Wang R, Zhang Q, Li Y. Deterioration of concrete under the coupling effects of freeze–thaw cycles and other actions: A review[J]. Construction and Building Materials, 2022, 319:126045.

LU Xiang, ZHOU Wei, CAI Qingxiang, et al. Mechanical properties and meso fracture mechanism of mudstone under freeze-thaw cycle[J]. Journal of Mining & Safety Engineering, 2021, 38(04):819-829. (In Chinese)

HAN Tie-lin, CHEN Yun-sheng, SHI Jun-ping, et al. Experimental study on mechanical properties and damage degradation mechanism of calcareous sandstone subjected to freeze-thaw cycles[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(10):1802-1812. (In Chinese)

LU Yani, LI Xinping, HAN Yanhua. Mechanical characteristics of anisotropic sandstone under freeze-thaw cycles[J]. Journal of Glaciology and Geocryology, 2020, 42(3):889-898. (In Chinese)

Asaad Al-Omari, Kevin Beck, Xavier Brunetaud, et al. Critical degree of saturation: A control factor of freeze–thaw damage of porous limestones at Castle of Chambord, France[J]. Engineering Geology, Vol. 185(2015),2015, 71-80.

Maxim Deprez, Tim De Kock,Geert De Schutter.The role of ink-bottle pores in freeze-thaw damage of oolithic limestone[J]. Construction and Building Materials, Vol. 246 (2020)118515.

CHEN Shaojie, LI Faxin, YIN Dawei, et al. Experimental study on deformation failure characteristics of limestone − coal composite with different rock-coal height ratios[J]. Journal of Central South University(Science and Technology): 1-14[2023-04-12]. (In Chinese)

MA De-peng, ZHOU Yan, LIU Chuan-xiao, et al. Energy evolution characteristics of coal failure in triaxial tests under different unloading confining pressure rates[J]. Rock and Soil Mechanics, 2019, 40(07):2645-2652.(In Chinese)

SU Hongyan, SONG Pingxin, HE Qiang. Mechanical properties and energy evolution of cemented tailings backfill at different curing temperatures[J]. Journal of Mining and Strata Control Engineering, 2023, 5(2):023013. (In Chinese)

CHEN Xin, MA Botao, LI Peichan, et al. Study on Characteristic of Energy Dissipation for Jointed Specimens under Uniaxial Compression[J]. METAL MINE, 2022(04):23-30.(In Chinese)