Pore-structure evolution and net bulk shrinkage of undisturbed soft clay during closed-system freeze—thaw: The role of internal hydrothermal redistribution

Freeze–Thaw-Induced Surface Crack and Pore Structure Evolution in Compacted Expansive Soil

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...

Investigation of Failure Mechanisms and Performance Optimization of Channel Seepage Control Layers in Cold Regions Under Coupled Wetting, Drying, Freezing, and Thawing Cycles

To address the degradation of seepage-control linings and structural instability of water-conveyance channels under coupled wetting-drying-freeze-thaw conditions in cold regions, this study investigated rehabilitated channels founded on expansive mudstone in northern Xinjiang. A two-dimensional transient finite-element...

A Freeze-thaw damage model for rock based on equivalent pore structure

From Pore Expansion to Throat Extension: Effects of Freezing Temperature on Microstructural Evolution and Dynamic Strength Decay in Sandstone

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...

Coupling Water-Ice Phase Transition DEM to Characterize Freeze-Thaw ITZ Damage in Cold Recycled Mixtures

Cold recycled mixtures with bitumen emulsion (CRME) serving in seasonally frozen regions are susceptible to mechanical deterioration under repeated freeze-thaw (F-T) cycles, which is primarily manifested as interfacial damage and crack propagation. However, the micro-mechanical processes associated with the transmissio...

Freeze–Thaw Cycle–Driven Pore Structure Evolution in Cement Paste at Varying Freezing Temperatures: Quantitative CT Analysis and Strength Damage Prediction

Freezing temperature strongly affects freeze–thaw (F-T) deterioration of cement-based materials, but its role in regulating three-dimensional pore morphology and geometrical complexity remains insufficiently quantified. In this study, X-ray computed tomography (CT) was used to characterize the evolution of the pore s...