Influence of physical and mechanical properties on the durability of limestone subjected to freeze-thaw cycles

Eslami, Javad; Walbert, Charlotte; Beaucour, Anne-Lise; Bourgès, Ann; Noumowé, Albert

doi:10.1016/j.conbuildmat.2017.12.031

Cited by 91 publications

(27 citation statements)

References 16 publications

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“…For example, they are, respectively, 29%, 43%, and 33% after 40 freezing-thawing cycles compared to 20 freezing-thawing Advances in Civil Engineering cycles and are, respectively, 14%, 10%, and 50% after 60 freezing-thawing cycles compared to 40 freezing-thawing cycles. is observation matches well with that found by Eslami et al [10] who showed the majority of damage occurred in the first freezing-thawing cycle. Further increase of freezing-thawing cycle number from 60 to 80 causes a significant increase in all three types of microcracks.…”

Section: Microcrackssupporting

confidence: 93%

“…e above results are in agreement with other studies. For example, Eslami et al [10] showed a volumetric expansion during the freezing phase accompanied by very important damage from the first cycle until the failure of specimen for Migne and Saint-Maximin limestones in French. As the pore structure is subjected to the maximum pressure gradient due to the ice expansion in the first cycle when the pores are still relatively small, the pore structure in the rock could be deteriorated at a large extent.…”

Section: Unloading Stress-strainmentioning

confidence: 99%

“…But this understanding is still limited as currently most unloading rock failure studies focus on the rock failure behaviour without freezing-thawing damage [7][8][9]. e static mechanical properties and durability of rocks degraded after freezing-thawing cycles [6,[10][11][12][13][14]. e cyclic volumetric expansion and contraction accompanied by pore structure damage until the failure of limestone specimen were observed throughout freezing-thawing process [10].…”

Section: Introductionmentioning

confidence: 99%

“…e static mechanical properties and durability of rocks degraded after freezing-thawing cycles [6,[10][11][12][13][14]. e cyclic volumetric expansion and contraction accompanied by pore structure damage until the failure of limestone specimen were observed throughout freezing-thawing process [10]. e damage could decrease the rock dynamical peak stress and elastic moduli, increase rock porosity, and strengthen plasticity as reported by Zhang et al [15], Li et al [16], Ke et al [12], Walbert et al [13], and Khanlari et al [14].…”

Section: Introductionmentioning

confidence: 99%

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Microscopic Characteristics of Fractured Sandstone after Cyclic Freezing‐Thawing and Triaxial Unloading Tests

Shen

Zhu

2019

Advances in Civil Engineering

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e understanding of tunneling rock failure characteristics under unloading conditions in the cold region is critical for the proper design of rock tunneling support and mining safety operation. Given this understanding is currently limited, this study aimed to investigate the characteristics of fractured sandstone samples in the microscale after cyclic freezing-thawing and triaxial unloading tests. e samples were first subjected to different cycles of freezing and thawing, followed by the triaxial unloading test and scanning electron microscopy imaging. e peak strength and damage dilatancy stress were measured from the stress-strain curves. e microcrack characteristics (number, length, and width) were obtained through the image analysis. e results show that the decrease in peak strength and damage dilatancy stress was more significant by the first 20 freezing-thawing cycles when the pore pressure gradient is maximum compared to the later freezing-thawing cycles. e mechanical properties also significantly deteriorated when the severe freezing-thawing treatments were performed. e fracture section mainly had the morphology of honeycomb-like microstructure, stripped microstructure, and flocculent microstructure. e cracking extent was mainly influenced by the freezing-thawing rather than the triaxial unloading test, but the azimuthal angle of microcracks was significantly altered by the triaxial unloading. To properly design rock tunneling support and safe operation of mining in the cold region, both impact of cyclic freezing-thawing and the excavation operation direction should be considered.

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Section: Microcrackssupporting

confidence: 93%

Section: Unloading Stress-strainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microscopic Characteristics of Fractured Sandstone after Cyclic Freezing‐Thawing and Triaxial Unloading Tests

Shen

Zhu

2019

Advances in Civil Engineering

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“…Two Savonnieres limestone cores were obtained from a quarry in the North-East of France (Lorraine region). Savonnieres limestone is a widely used standard carbonate rock used in many published studies of petrophysical and flow properties [27][28][29][30][31] . The XRD results of the rock show that the cores are almost entirely composed of calcite (>99%).…”

Section: Methodsmentioning

confidence: 99%

Pore Structure Changes Occur During CO2 Injection into Carbonate Reservoirs

Seyyedi

Mahmud

Verrall

et al. 2020

Sci Rep

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observations and modeling studies have shown that during co 2 injection into underground carbonate reservoirs, the dissolution of co 2 into formation water forms acidic brine, leading to fluid-rock interactions that can significantly impact the hydraulic properties of the host formation. However, the impacts of these interactions on the pore structure and macroscopic flow properties of host rock are poorly characterized both for the near-wellbore region and deeper into the reservoir. Little attention has been given to the influence of pressure drop from the near-wellbore region to reservoir body on disturbing the ionic equilibrium in the co 2-saturated brine and consequent mineral precipitation. In this paper, we present the results of a novel experimental procedure designed to address these issues in carbonate reservoirs. We injected CO 2-saturated brine into a composite core made of two matching grainstone carbonate core plugs with a tight disk placed between them to create a pressure profile of around 250 psi resembling that prevailing in reservoirs during CO 2 injection. We investigated the impacts of fluid-rock interactions at pore and continuum scale using medical X-ray CT, nuclear magnetic resonance, and scanning electron microscopy. We found that strong calcite dissolution occurs near to the injection point, which leads to an increase in primary intergranular porosity and permeability of the near injection region, and ultimately to wormhole formation. The strong heterogeneous dissolution of calcite grains leads to the formation of intra-granular micro-pores. At later stages of the dissolution, the internal regions of ooids become accessible to the carbonated brine, leading to the formation of moldic porosity. At distances far from the injection point, we observed minimal or no change in pore structure, pore roughness, pore populations, and rock hydraulic properties. The pressure drop of 250 psi slightly disturbed the chemical equilibrium of the system, which led to minor precipitation of sub-micron sized calcite crystals but due to the large pore throats of the rock, these deposits had no measurable impact on rock permeability. The trial illustrates that the new procedure is valuable for investigating fluid-rock interactions by reproducing the geochemical consequences of relatively steep pore pressure gradients during co 2 injection. Capturing CO 2 from large industrial sources and storing it in geological formations, such as saline aquifers, and depleted oil and gas fields, has become widely accepted as a viable solution for reducing high CO 2 levels in the atmosphere 1-3. Among underground formations, carbonate reservoirs are attractive CO 2 sequestration options, as the majority of the world's oil reserves (60%) are held in these types of rocks (especially in the Middle East), making them a primary storage target when combined with enhanced oil recovery (EOR) operations 4. Furthermore, since these reservoirs could hold the hydrocarbons for millions of years, it can be assumed that they can hold the CO ...

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Effects of Test Temperature and Low Temperature Thermal Cycling on the Dynamic Tensile Strength of Granitic Rocks

Mardoukhi

Hokka

et al. 2020

Rock Mech Rock Eng

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Influence of physical and mechanical properties on the durability of limestone subjected to freeze-thaw cycles

Cited by 91 publications

References 16 publications

Microscopic Characteristics of Fractured Sandstone after Cyclic Freezing‐Thawing and Triaxial Unloading Tests

Microscopic Characteristics of Fractured Sandstone after Cyclic Freezing‐Thawing and Triaxial Unloading Tests

Pore Structure Changes Occur During CO2 Injection into Carbonate Reservoirs

Effects of Test Temperature and Low Temperature Thermal Cycling on the Dynamic Tensile Strength of Granitic Rocks

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