Microscopic characterization of microcrack development in marble after cyclic treatment with high temperature

Peng, Jun; Guan, Rong; Tang, Zhicheng; Sha, Song

doi:10.1007/s10064-019-01494-2

Cited by 43 publications

(15 citation statements)

References 60 publications

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“…High values of α, together with high temperatures that reach the surface stones of the hamada and the cooling due to rain will produce a rapid surface contraction that causes the fragmentation of the Umm Bab Member. Texture, grain size and thermal dilatation of stones are the main factors that determine the rate of thermal decay due to, among other causes, physical-chemical processes that act to break bonds at cracks tips (Rong et al, 2018;Al-Omari et al, 2019;Jin et al, 2019;Peng et al, 2019;Shen et al, 2019). Cracking proceeds even when only extremely low stresses are applied to the stone (akin to very small pulling forces).…”

Section: Thermal and Hydric Dilatometrymentioning

confidence: 99%

Petrographic and petrophysical characterisation and structural function of the heritage stones in Fuwairit Archaeological Site (NE Qatar): implications for heritage conservation

et al. 2021

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Section: Thermal and Hydric Dilatometrymentioning

confidence: 99%

Petrographic and petrophysical characterisation and structural function of the heritage stones in Fuwairit Archaeological Site (NE Qatar): implications for heritage conservation

et al. 2021

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“…rough the Brazilian splitting test, Li et al [1] proved that the tensile strength of granite decreased with the increase of the number of thermal cycles, though the attenuation in tensile strength was primarily controlled by the temperature. Peng et al [5] investigated the variation law of micro thermal cracks in fine granular marble treated at 600 °C as a function of the cycle times. e results showed that the microcracks in the marble were primarily intergranular cracks, the length and width of which increased with the number of cycles.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Damage and Fracture Characteristics of Granite under Different Water Cooling Conditions

Yao

Zhang

et al. 2021

Shock and Vibration

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In order to investigate the mechanical property deterioration and fracture characteristics of granite under different temperature drop and thermal cycle conditions, the evolution laws of mechanical properties, acoustic emission event distribution, and macro and micro failure characteristics of granite under different temperature changes were studied and analyzed by the servo loading, acoustic emission monitoring, and scanning electron microscope systems. The following conclusions were gained from the test results. (1) The peak stress and elasticity modulus of the three temperature drop treatments all decreased with the increase of the number of thermal cycles. In terms of magnitude, the following relationship was satisfied: 10°C > 15°C > 20°C. After 8 cycles, the peak stress and elasticity modulus tended to be stable for 15°C and 20°C temperature drops. (2) At a temperature drop of 20°C, the heterogeneity first increased and then tended to be stable; when the temperature was dropped by 15°C at each cycle, however, the heterogeneity first decreased and then became stable; as for the case of 10°C, the heterogeneity showed an overall decreasing trend. After 4 cycles, the heterogeneities were ranked as 15°C > 20°C > 10°C. After 8 cycles, 20°C > 15°C > 10°C. (3) With the decrease of temperature drop amplitude or the increase of cycles, the connectivity of microcracks in granite improved on the whole, the aperture and shape factor of microcracks increased, the damage of granite intensified, and the duration of the quiet period in the acoustic emission ringing count rate prolonged. (4) The tensile failure dominated at a temperature drop amplitude of 10°C. When the temperature drop was 15°C, the failure mode transitioned from hybrid tension-shear failure to tensile failure as the cycle times increased, whereas the hybrid tension-shear failure dominated with a temperature drop of 20°C.

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“…Therefore, attention should be also given to the dynamic behaviors of rock after thermal cycling treatments. Previous studies have focused on the static behavior of rock after thermal cycling treatments (Rong et al 2018;Ge and Sun 2018;Peng et al 2019;Jin et al 2019). However, research on the dynamic behavior of rock after thermal cycling treatments is very limited.…”

Section: Introductionmentioning

confidence: 99%

Thermal cycling effects on the dynamic behavior of granite and microstructural observations

Gao

Fan

Wan

2021

Bull Eng Geol Environ

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This study investigated the thermal cycling effects on the dynamic behavior of granite and described its microstructure. The specimens were subjected to various numbers of thermal cycles (0, 1, 3, 5, and 7 cycles) at temperatures ranging from 25 to 500 °C. Then, ultrasonic wave tests and split Hopkinson pressure bar (SHPB) tests (with different impact gas pressures of 0.25, 0.28, and 0.31 MPa) were performed to study the thermal cycling effects on the P-wave velocity, P-wave modulus, dynamic compressive strength, and impact failure pattern of the granite specimens. Finally, scanning electron microscopy (SEM) was performed to analyze the micromechanism of the dynamic property degeneration of the granite specimens. The results show that the dynamic properties of the P-wave velocity, P-wave modulus, and dynamic compressive strength exponentially decrease as the number of thermal cycles increases. The decreases in the dynamic properties mainly occur during the first thermal cycle, and the P-wave modulus and dynamic strength decrease by 67.5% and 8.4-16.3%, respectively. Moreover, a higher dynamic compressive strength, smaller fragments, and more fine powder are generated by impact failure with a larger strain rate. Smaller fragments and more fine powder are observed after impact failure as the number of thermal cycles increases. The tests further reveal that the dynamic properties of thermally damaged granite are closely related to the microcracks induced by thermal cycling.

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Microscopic characterization of microcrack development in marble after cyclic treatment with high temperature

Cited by 43 publications

References 60 publications

Petrographic and petrophysical characterisation and structural function of the heritage stones in Fuwairit Archaeological Site (NE Qatar): implications for heritage conservation

Petrographic and petrophysical characterisation and structural function of the heritage stones in Fuwairit Archaeological Site (NE Qatar): implications for heritage conservation

Experimental Study on Mechanical Damage and Fracture Characteristics of Granite under Different Water Cooling Conditions

Thermal cycling effects on the dynamic behavior of granite and microstructural observations

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