Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature granite
To study the mechanical properties and damage characteristics of cooled high-temperature rocks, uniaxial compression tests on granite cooled using two different media (water and concrete) after high-temperature treatment at 200–800 °C were conducted. The stage damage characteristics of the rock were...
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Elsevier
2025-02-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24017477 |
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| author | Xingchen Liu Feng Huang Aichen Zheng Dong Yang |
| author_facet | Xingchen Liu Feng Huang Aichen Zheng Dong Yang |
| author_sort | Xingchen Liu |
| collection | DOAJ |
| description | To study the mechanical properties and damage characteristics of cooled high-temperature rocks, uniaxial compression tests on granite cooled using two different media (water and concrete) after high-temperature treatment at 200–800 °C were conducted. The stage damage characteristics of the rock were analyzed in terms of mechanical deformation, acoustic emission, and temperature field. A rock brittleness evaluation method for the entire deformation process, considering the stress–strain relationship and energy storage–dissipation mechanism of rocks, is proposed. Experimental results showed that, as the heating temperature increased, the mass loss rate, volume expansion rate, and wave velocity attenuation rate of the rock increased, whereas the specific heat capacity decreased. Under a uniaxial compression load, the failure mode of the rock samples evolved from splitting to conical failure as the heating temperature increased. The mass of the exfoliated rock debris was nonlinear and positively correlated with the heating temperature. The energy storage limit Uel, energy storage efficiency η, pre-peak brittleness index Kpre, post-peak brittleness index Kpost, and whole-process brittleness index K‾a of the rock decreased as heating temperature increased. Under the same high-temperature treatment conditions, the higher the thermal conductivity of the cooling medium, the more significant the cooling impact damage. |
| format | Article |
| id | doaj-art-5dee3b6adca04dc383948943d9bd08f3 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-5dee3b6adca04dc383948943d9bd08f32025-02-02T05:27:14ZengElsevierCase Studies in Thermal Engineering2214-157X2025-02-0166105716Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature graniteXingchen Liu0Feng Huang1Aichen Zheng2Dong Yang3State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; Corresponding author. No. 66 Xuefu Avenue, Nan'an District, Chongqing, China.School of Civil Engineering, Chongqing Vocational Institute of Engineering, Chongqing, 402260, ChinaSchool of Civil Engineering, Chongqing City Vocational College, Chongqing, 402160, ChinaTo study the mechanical properties and damage characteristics of cooled high-temperature rocks, uniaxial compression tests on granite cooled using two different media (water and concrete) after high-temperature treatment at 200–800 °C were conducted. The stage damage characteristics of the rock were analyzed in terms of mechanical deformation, acoustic emission, and temperature field. A rock brittleness evaluation method for the entire deformation process, considering the stress–strain relationship and energy storage–dissipation mechanism of rocks, is proposed. Experimental results showed that, as the heating temperature increased, the mass loss rate, volume expansion rate, and wave velocity attenuation rate of the rock increased, whereas the specific heat capacity decreased. Under a uniaxial compression load, the failure mode of the rock samples evolved from splitting to conical failure as the heating temperature increased. The mass of the exfoliated rock debris was nonlinear and positively correlated with the heating temperature. The energy storage limit Uel, energy storage efficiency η, pre-peak brittleness index Kpre, post-peak brittleness index Kpost, and whole-process brittleness index K‾a of the rock decreased as heating temperature increased. Under the same high-temperature treatment conditions, the higher the thermal conductivity of the cooling medium, the more significant the cooling impact damage.http://www.sciencedirect.com/science/article/pii/S2214157X24017477Mechanical propertiesHigh-temperature graniteCooling impact damageEnergy storage–dissipation indicator |
| spellingShingle | Xingchen Liu Feng Huang Aichen Zheng Dong Yang Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature granite Case Studies in Thermal Engineering Mechanical properties High-temperature granite Cooling impact damage Energy storage–dissipation indicator |
| title | Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature granite |
| title_full | Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature granite |
| title_fullStr | Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature granite |
| title_full_unstemmed | Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature granite |
| title_short | Effects of two different cooling impact treatments on the thermal damage and mechanical properties of high-temperature granite |
| title_sort | effects of two different cooling impact treatments on the thermal damage and mechanical properties of high temperature granite |
| topic | Mechanical properties High-temperature granite Cooling impact damage Energy storage–dissipation indicator |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24017477 |
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