Effects of High Temperature on the Mechanical Properties of Chinese Marble

Zhu, Zhennan; Tian, Hong; Jiang, Guosheng; Wan, Cheng

doi:10.1007/s00603-018-1426-0

Cited by 68 publications

(16 citation statements)

References 21 publications

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“…An increased in the porosity makes the rock sample less compact and consequently result to the reduction of the rock strength. These observations are similar to those reported by Zhu, Tian, Jiang, & Cheng (2018) for Chinese marbles. They observed that at a temperature above 200°C the trend of the strength of some marble with temperature can either increasing or decreasing while most marble basically decrease with temperature from 200 to 800°C.…”

Section: Figure 6 Variation Of Ucs Of the Limestone Samples With Different Temperatures Figure 7 Variation Of Ucs Of The Marble Samples Wsupporting

confidence: 92%

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Idris¹

2018

Min. miner. depos.

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Purpose. Limestone and marble are carbonate rocks with several structural and engineering applications. The physical and mechanical properties of the rocks are fundamental as they determine their suitability for various use. Temperature is one of the critical factors that could affect the properties of the rocks and consequently their engineering application. Therefore, a better understanding of how the temperature, especially when it is higher than ambient, will affect the properties of the rocks is essential. In this work, the effects of the elevated temperature on some physical and mechanical properties of the carbonate rocks have been studied.Methods. Cubic samples of the rocks were prepared and heated in a furnace to different temperatures up to 900°C at an interval of 100°C and then cooled to the room temperature for testing. Porosity, dry density and uniaxial compressive strength (UCS) of the samples were determined under the effect of the elevated temperature. The porosity and dry density were determined using the saturation and buoyancy method while the UCS was estimated from the point load index tests performed on the samples.Findings. The results of this work indicate that the elevated temperature has significant effects on the physical and mechanical properties of the rocks. The porosity of the rocks showed an increasing trend as the temperature was increased while the density steadily decreased especially at the temperature above 300°C. The UCS of the rocks also declines with increased temperature but with an intermittent increase in their strength at a specific heating temperature.Originality. Most of the available studies on Nigerian carbonate rocks are focused on the estimation of physical and mechanical properties of the rocks without considering changes in these properties when the rocks are subjected to high temperatures. This study therefore aims to fill the gap by investigating the effects of the elevated temperatures on the physical and mechanical properties of some of the Nigerian carbonate rocks. Practical implications.The results of this study further increase understanding of the effect of high temperature on carbonate rocks, and also help to identify the critical temperature at which the properties of carbonate rocks undergo significant and irreversible changes. This information is very important for restoration of valuable fire-damaged structures made of carbonate rocks.

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Section: Figure 6 Variation Of Ucs Of the Limestone Samples With Different Temperatures Figure 7 Variation Of Ucs Of The Marble Samples Wsupporting

confidence: 92%

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Idris¹

2018

Min. miner. depos.

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“…When the temperature is above 500°C, the magnesium calcite (MgCO 3 ) starts to be decomposed into MgO and CO 2 at around 520°C. e thermal decomposition of calcium carbonate (CaCO 3 ) also starts at around 530°C and becomes dramatic around 897°C [28,36]. erefore, the density shows a dramatic reduction, while the ultrasonic velocity shows a relatively small variation after the drastic degradation in the previous stage.…”

Section: Physical Propertiesmentioning

confidence: 99%

“…It can be observed that the peak strength does not decrease dramatically below 450°C but drops sharply when the temperature is above 450°C, especially when temperature reaches 900°C. e possible reason for this phenomenon may be that the thermal decomposition of magnesium calcite and calcium carbonate occurs until the temperature is above 500°C and calcium carbonate decomposes dramatically around 900°C [28,36]. e occurrence of thermal decomposition aggravates the generation and propagation of lots of microcracks, which further leads to the deterioration of peak strength.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Experimental Study on Mechanical Property and Pore Distribution of Limestone Specimens after Heat Treatment under Different Heating Conditions

Feng

Yin

et al. 2021

Advances in Materials Science and Engineering

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The thermal effect of rocks not only depends on the temperature level but also may be influenced by the factors including heating environment, heating rate, and cooling method. In this study, approximate vacuum (V) and air circulation (A) heating condition are, respectively, applied on the limestone specimens in the whole heating process. Then, physical, mechanical, and nuclear magnetic resonance (NMR) tests were carried out to investigate the effect of heating conditions on the rock properties. The results show that heating conditions have significant effects on mechanical properties of limestone specimens (including peak strength, elasticity modulus, secant modulus, and crack initiation stress), which are due to the interference effect on the oxidation and thermal decomposition. It is worth noting that the significant temperature range of the heating condition is 450 ∼ 750°C, during which the mechanical performances of heat-treated specimens under V condition obviously outperform those under A condition. Combining the NMR results and the microstructure images from scanning electron microscope (SEM) technology, the evolution of pore distribution was revealed. As temperature increases from room temperature to 900°C, porosity increases gradually. However, pore distribution changes from small and medium pores dominating to large pore dominating and then to medium pore dominating. For limestone specimens after high-temperature treatment above 450°C, mineral crystals may melt and reconsolidate, filling in some of the previously large pores generated by thermal decomposition.

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“…is is due to the fact that the ground temperature will increase with the buried depth (the ground temperature gradient is generally 30∼50°C/km [5]), especially for nuclear waste disposal projects, and the temperature of the rock could even reach thousands of degrees. e mechanical properties of various types of rocks such as granite [6], sandstone [7], marble [8], and salt rock [9] have been studied under real-time temperature.…”

Section: Introductionmentioning

confidence: 99%

A Novel Fatigue Damage Model of Rock considering Temperature Effects

Zhu

Cai

et al. 2020

Advances in Civil Engineering

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The deformation rules and failure types of rock fatigue damage at different temperatures are quite different, and existing constitutive theory cannot describe them quantitatively. A novel rock fatigue damage model considering the effects of temperature was presented based on phenomenology. In this model, the residual strain method was used to define the fatigue damage, and the Harris attenuation function was introduced to characterize the cyclic damage evolution. The proposed model has considered the influence of the initial damage and temperature, and the model parameters can be easily calculated. The accuracy of the model was verified by comparing the calculated values of cyclic upper strain and fatigue life with previous test results. The physical significance of the model parameters shows that parameter a is related to fatigue stress ratio and lithology, while parameter b is related to temperature. The study has some reference values for the fatigue damage model of rock considering the influence of temperature.

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Effects of High Temperature on the Mechanical Properties of Chinese Marble

Cited by 68 publications

References 21 publications

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Experimental Study on Mechanical Property and Pore Distribution of Limestone Specimens after Heat Treatment under Different Heating Conditions

A Novel Fatigue Damage Model of Rock considering Temperature Effects

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