Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing
In order to study the damage characteristics of the yellow sandstone containing pores under the freeze-thaw cycle, the uniaxial compression test of saturated water-stained yellow sandstones with different freeze-thaw cycles was carried out by rock servo press, the microstructure was qualitatively an...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/5921901 |
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| author | Huren Rong Jingyu Gu Miren Rong Hong Liu Jiayao Zhang Hao Dong |
| author_facet | Huren Rong Jingyu Gu Miren Rong Hong Liu Jiayao Zhang Hao Dong |
| author_sort | Huren Rong |
| collection | DOAJ |
| description | In order to study the damage characteristics of the yellow sandstone containing pores under the freeze-thaw cycle, the uniaxial compression test of saturated water-stained yellow sandstones with different freeze-thaw cycles was carried out by rock servo press, the microstructure was qualitatively analyzed by Zeiss 508 stereo microscope, and the microdamage mechanism was quantitatively studied by using specific surface area and pore size analyzer. The mechanism of weakening mechanical properties of single-hole yellow sandstone was expounded from the perspective of microstructure. The results show the following. (1) The number of freeze-thaw cycles and single-pore diameter have significant effects on the strength and elastic modulus of the yellow sandstone; the more the freeze-thaw cycles and the larger the pore size, the lower the strength of the yellow sandstone. (2) The damage modes of the yellow sandstone containing pores under the freeze-thaw cycle are divided into five types, and the yellow sandstone with pores is divided into two areas: the periphery of the hole and the distance from the hole; as the number of freeze-thaw cycles increases, different regions show different microscopic damage patterns. (3) The damage degree of yellow sandstone is different with freeze-thaw cycle and pore size. Freeze-thaw not only affects the mechanical properties of yellow sandstone but also accelerates the damage process of pores. (4) The damage of the yellow sandstone by freeze-thaw is logarithmic function, and the damage of the yellow sandstone is a power function. The damage equation of the yellow sandstone with pores under the freezing and thawing is a log-power function nonlinear change law and presents a good correlation. |
| format | Article |
| id | doaj-art-178252a054b048d89d1af587f27042f5 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
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| series | Advances in Civil Engineering |
| spelling | doaj-art-178252a054b048d89d1af587f27042f52025-08-20T03:54:20ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/59219015921901Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and ThawingHuren Rong0Jingyu Gu1Miren Rong2Hong Liu3Jiayao Zhang4Hao Dong5Department of Civil Engineering Shanxi University, Taiyuan, Shanxi 030013, ChinaHebei Institute of Architecture and Civil Engineering, Zhangjiakou, Hebei 075024, ChinaShijiazhuang Tiedao University, Shijiazhuang 050043, Hebei, ChinaDepartment of Civil Engineering Shanxi University, Taiyuan, Shanxi 030013, ChinaHebei Institute of Architecture and Civil Engineering, Zhangjiakou, Hebei 075024, ChinaHebei Institute of Architecture and Civil Engineering, Zhangjiakou, Hebei 075024, ChinaIn order to study the damage characteristics of the yellow sandstone containing pores under the freeze-thaw cycle, the uniaxial compression test of saturated water-stained yellow sandstones with different freeze-thaw cycles was carried out by rock servo press, the microstructure was qualitatively analyzed by Zeiss 508 stereo microscope, and the microdamage mechanism was quantitatively studied by using specific surface area and pore size analyzer. The mechanism of weakening mechanical properties of single-hole yellow sandstone was expounded from the perspective of microstructure. The results show the following. (1) The number of freeze-thaw cycles and single-pore diameter have significant effects on the strength and elastic modulus of the yellow sandstone; the more the freeze-thaw cycles and the larger the pore size, the lower the strength of the yellow sandstone. (2) The damage modes of the yellow sandstone containing pores under the freeze-thaw cycle are divided into five types, and the yellow sandstone with pores is divided into two areas: the periphery of the hole and the distance from the hole; as the number of freeze-thaw cycles increases, different regions show different microscopic damage patterns. (3) The damage degree of yellow sandstone is different with freeze-thaw cycle and pore size. Freeze-thaw not only affects the mechanical properties of yellow sandstone but also accelerates the damage process of pores. (4) The damage of the yellow sandstone by freeze-thaw is logarithmic function, and the damage of the yellow sandstone is a power function. The damage equation of the yellow sandstone with pores under the freezing and thawing is a log-power function nonlinear change law and presents a good correlation.http://dx.doi.org/10.1155/2020/5921901 |
| spellingShingle | Huren Rong Jingyu Gu Miren Rong Hong Liu Jiayao Zhang Hao Dong Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing Advances in Civil Engineering |
| title | Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing |
| title_full | Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing |
| title_fullStr | Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing |
| title_full_unstemmed | Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing |
| title_short | Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing |
| title_sort | strength and microscopic damage mechanism of yellow sandstone with holes under freezing and thawing |
| url | http://dx.doi.org/10.1155/2020/5921901 |
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