Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base
Understanding the evolution of mechanical properties and pore structure of semirigid base under large temperature difference is of great significance for evaluating the durability and safety of semirigid base structure and studying the damage cracking mechanism and prevention technology of semirigid...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/4603007 |
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| author | Ming Dai Jia Pan Yanjun Shen Jianbo Deng Yeermulati Muhadeer |
| author_facet | Ming Dai Jia Pan Yanjun Shen Jianbo Deng Yeermulati Muhadeer |
| author_sort | Ming Dai |
| collection | DOAJ |
| description | Understanding the evolution of mechanical properties and pore structure of semirigid base under large temperature difference is of great significance for evaluating the durability and safety of semirigid base structure and studying the damage cracking mechanism and prevention technology of semirigid base induced by large temperature difference climate. This paper studies the variation law of peak stress and dynamic modulus, the evolution characteristics of pore structure, and the pore size distribution of semirigid base after different cycles at different temperature intervals. Based on the analysis of peak stress and dynamic modulus test results, the degradation effect of freeze-thaw environment (−20°C∼20°C) on semirigid base is far greater than that of high-temperature environment (20°C∼60°C) and low-temperature environment (−5°C∼−30°C). There are significant decreases in peak stress and dynamic modulus of semirigid base in the late cycle (12 to 15 cycles). Under low-temperature and freeze-thaw environments, the axial load resistance of semirigid base is significantly correlated with the deformation resistance, and the correlation between the two is not significant under high-temperature environment. The variability of the thermal expansion and contraction characteristics of the internal microscopic phases of the semirigid base and the force characteristics of the pore interface phases are the root causes of the damage and cracking of the pavement base in a large temperature difference climate. |
| format | Article |
| id | doaj-art-38fcbd86efcb4b18b22b8af31bc54580 |
| institution | Kabale University |
| issn | 1687-8094 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-38fcbd86efcb4b18b22b8af31bc545802025-02-03T01:07:21ZengWileyAdvances in Civil Engineering1687-80942022-01-01202210.1155/2022/4603007Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid BaseMing Dai0Jia Pan1Yanjun Shen2Jianbo Deng3Yeermulati Muhadeer4China Railway Construction Xinjiang Jingxin Expressway Co.College of Architecture and Civil EngineeringCollege of Geology and EnvironmentChina Railway Construction Xinjiang Jingxin Expressway Co.China Railway Construction Xinjiang Jingxin Expressway Co.Understanding the evolution of mechanical properties and pore structure of semirigid base under large temperature difference is of great significance for evaluating the durability and safety of semirigid base structure and studying the damage cracking mechanism and prevention technology of semirigid base induced by large temperature difference climate. This paper studies the variation law of peak stress and dynamic modulus, the evolution characteristics of pore structure, and the pore size distribution of semirigid base after different cycles at different temperature intervals. Based on the analysis of peak stress and dynamic modulus test results, the degradation effect of freeze-thaw environment (−20°C∼20°C) on semirigid base is far greater than that of high-temperature environment (20°C∼60°C) and low-temperature environment (−5°C∼−30°C). There are significant decreases in peak stress and dynamic modulus of semirigid base in the late cycle (12 to 15 cycles). Under low-temperature and freeze-thaw environments, the axial load resistance of semirigid base is significantly correlated with the deformation resistance, and the correlation between the two is not significant under high-temperature environment. The variability of the thermal expansion and contraction characteristics of the internal microscopic phases of the semirigid base and the force characteristics of the pore interface phases are the root causes of the damage and cracking of the pavement base in a large temperature difference climate.http://dx.doi.org/10.1155/2022/4603007 |
| spellingShingle | Ming Dai Jia Pan Yanjun Shen Jianbo Deng Yeermulati Muhadeer Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base Advances in Civil Engineering |
| title | Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base |
| title_full | Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base |
| title_fullStr | Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base |
| title_full_unstemmed | Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base |
| title_short | Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base |
| title_sort | experimental study on the effect of large temperature difference on compressive strength and pore structure of semirigid base |
| url | http://dx.doi.org/10.1155/2022/4603007 |
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