Freeze-Thaw Effects on Mechanical Properties of Rock Materials

Freeze-thaw cycling constitutes a principal form of physical weathering in cold and temperate climates, exerting a profound influence on the integrity and durability of rock masses. Within the pore network of rock, water undergoes cyclic freezing and thawing, giving rise to crystallisation pressure as ice forms and expands. Repeated application of such pressure generates microcracks, increases porosity and degrades both static and dynamic mechanical properties. Over successive cycles, reductions in uniaxial compressive strength and elastic modulus are commonly observed, accompanied by shifts in failure mode from tensile splitting to shear‐dominant fracture. These changes are governed by a complex interplay between pore structure, moisture content and confining stress. At the macro-scale, freeze-thaw deterioration compromises the stability of engineered and natural slopes, undermines tunnel linings in cold regions and accelerates the decay of heritage masonry. Understanding the mechanisms and quantifying the degradation trends are essential for the design of resilient infrastructure and the prediction of long-term rock performance under changing climatic conditions.

Research from Nature Portfolio

Recent studies have quantified the impact of freeze-thaw cycling on sandstone subjected to low confining pressure in simulated tunnel environments. Under triaxial compression, peak strength and elastic modulus declined by up to 38% and 41%, respectively, after multiple cycles. Acoustic emission monitoring revealed increased microseismic activity with cycle number, indicating progressive microfracturing. Mercury intrusion porosimetry demonstrated a significant rise in macropore fraction, correlating pore-structure evolution with mechanical weakening. These observations substantiate a direct link between ice-induced pore enlargement and the transition from tensile fragmentation to shear failure modes, emphasising the necessity of incorporating freeze-thaw effects into rock‐engineering design criteria in cold‐region infrastructure.

Freeze-Thaw Effects on Mechanical Properties of Rock Materials publication trend

The graph below shows the total number of articles in freeze-thaw effects on mechanical properties of rock materials across all publications each year (not limited to Nature Index journals).

Technical terms

Porosity: The volume fraction of void space within a rock, crucial for fluid transport and ice formation.

Uniaxial Compressive Strength: The maximum axial stress a rock specimen can withstand under one‐dimensional loading before failure.

Elastic Modulus (Young’s Modulus): A measure of rock stiffness, defined as the slope of the linear portion of the stress–strain curve.

Acoustic Emission: The release of transient elastic waves during microcrack formation, used to monitor internal damage evolution.

Mercury Intrusion Porosimetry: A technique to characterise pore‐size distribution by measuring the intrusion of mercury under controlled pressure.

Frost Heave: Upward displacement of rock or soil caused by ice lens formation within the pore network during freezing.

Crystallisation Pressure: The stress exerted by growing ice crystals within rock pores, driving microcrack initiation and propagation.

References

1. Analysis of Effects of Rock Physical Properties Changes from Freeze-Thaw Weathering in Ny-Ålesund Region: Part 1—Experimental Study. Applied Sciences (2020).
2. Effect of freeze–thaw cycle on physical and mechanical properties and damage characteristics of sandstone. Scientific Reports (2021).
3. Experimental Study on Physical-mechanical Properties and Fracture Behaviors of Saturated Yellow Sandstone Considering Coupling Effect of Freeze-Thaw and Specimen Inclination. Sustainability (2020).