To address the deterioration of rock engineering stability in seasonally frozen regions, this study investigated the mechanical response and damage evolution of sandstone subjected to the coupled effects of freeze-thaw (F-T) cycles and filled fractures. Uniaxial compression tests were performed on intact specimens and...
Highlights Freeze–thaw degradation of permeable concrete was quantified up to 120 cycles. Damage evolved from paste peeling and microcracks to pore-structure failure. BPN remained above 70 after freeze–thaw cycles, indicating high skid resistance. Higher porosity accelerated strength loss, permeability decay, and pore...
Reliable characterization of freeze–thaw-induced structural change is essential for evaluating compacted soils used in cold-region engineering, where repeated freezing and thawing can alter both surface integrity and internal pore structure. This study combines digital imaging, quantitative crack analysis, and X-ray co...
This study addresses the challenge of the mechanical behavior of fractured rock masses in cold regions under freeze–thaw-fatigue coupling. Uniaxial step-incremental cyclic loading tests were conducted on double-cracked red sandstone subjected to different numbers of freeze–thaw cycles to reveal the damage evolution law...
Repeated freeze–thaw (F–T) action, together with dynamic disturbances, can progressively weaken rock masses in cold regions. However, how freezing temperature affects the relationship between microstructural evolution and dynamic strength decay remains insufficiently quantified. This study investigated yellow sandstone...
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