Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion
The issue of rock deterioration in chemical environments has drawn much attention in recent years in the rock engineering community. In this study, a series of 30 freeze-thaw cycling tests are conducted on sandstone samples soaked in H2SO4 solution and in pure water, prior to the application of nucl...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/9687843 |
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| author | Jielin Li Rennie B. Kaunda Longyin Zhu Keping Zhou Feng Gao |
| author_facet | Jielin Li Rennie B. Kaunda Longyin Zhu Keping Zhou Feng Gao |
| author_sort | Jielin Li |
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| description | The issue of rock deterioration in chemical environments has drawn much attention in recent years in the rock engineering community. In this study, a series of 30 freeze-thaw cycling tests are conducted on sandstone samples soaked in H2SO4 solution and in pure water, prior to the application of nuclear magnetic resonance (NMR) on the rock specimens. The porosity of the sandstone, the distribution of transverse relaxation time T2, and the NMR images are acquired after each freeze-thaw cycle. The pore size distribution curves of the sandstone after freeze-thaw cycles, four categories of pore scale, and the features of freeze-thaw deterioration for pores of different sizes in H2SO4 solution and pure water are established. The result shows that, with the influence of the acid environment and the freeze-thaw cycles, the mass of the samples largely deteriorates. As the freeze-thaw cycles increase, the porosity of rocks increases approximately linearly. The distribution of the NMR T2 develops gradually from 4 peaks to 5 or even to 6. Magnetic resonance imaging (MRI) dynamically displays the process of the freeze-thaw deterioration of the microstructure inside the sandstones under acid conditions. The results also show pore expansion in rocks under the coupling effects of chemistry and the freeze-thaw cycles, which differ largely from the freeze-thaw deterioration of the rock specimens placed in pure water. |
| format | Article |
| id | doaj-art-ce6f639bea574a2eba6b0d316e6b3916 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-ce6f639bea574a2eba6b0d316e6b39162025-02-03T07:24:42ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/96878439687843Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical ErosionJielin Li0Rennie B. Kaunda1Longyin Zhu2Keping Zhou3Feng Gao4School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaDepartment of Mining Engineering, Colorado School of Mines, 1600 Illinois Street, Golden, Colorado 80401, USASchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaThe issue of rock deterioration in chemical environments has drawn much attention in recent years in the rock engineering community. In this study, a series of 30 freeze-thaw cycling tests are conducted on sandstone samples soaked in H2SO4 solution and in pure water, prior to the application of nuclear magnetic resonance (NMR) on the rock specimens. The porosity of the sandstone, the distribution of transverse relaxation time T2, and the NMR images are acquired after each freeze-thaw cycle. The pore size distribution curves of the sandstone after freeze-thaw cycles, four categories of pore scale, and the features of freeze-thaw deterioration for pores of different sizes in H2SO4 solution and pure water are established. The result shows that, with the influence of the acid environment and the freeze-thaw cycles, the mass of the samples largely deteriorates. As the freeze-thaw cycles increase, the porosity of rocks increases approximately linearly. The distribution of the NMR T2 develops gradually from 4 peaks to 5 or even to 6. Magnetic resonance imaging (MRI) dynamically displays the process of the freeze-thaw deterioration of the microstructure inside the sandstones under acid conditions. The results also show pore expansion in rocks under the coupling effects of chemistry and the freeze-thaw cycles, which differ largely from the freeze-thaw deterioration of the rock specimens placed in pure water.http://dx.doi.org/10.1155/2019/9687843 |
| spellingShingle | Jielin Li Rennie B. Kaunda Longyin Zhu Keping Zhou Feng Gao Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion Advances in Civil Engineering |
| title | Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion |
| title_full | Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion |
| title_fullStr | Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion |
| title_full_unstemmed | Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion |
| title_short | Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion |
| title_sort | experimental study of the pore structure deterioration of sandstones under freeze thaw cycles and chemical erosion |
| url | http://dx.doi.org/10.1155/2019/9687843 |
| work_keys_str_mv | AT jielinli experimentalstudyoftheporestructuredeteriorationofsandstonesunderfreezethawcyclesandchemicalerosion AT renniebkaunda experimentalstudyoftheporestructuredeteriorationofsandstonesunderfreezethawcyclesandchemicalerosion AT longyinzhu experimentalstudyoftheporestructuredeteriorationofsandstonesunderfreezethawcyclesandchemicalerosion AT kepingzhou experimentalstudyoftheporestructuredeteriorationofsandstonesunderfreezethawcyclesandchemicalerosion AT fenggao experimentalstudyoftheporestructuredeteriorationofsandstonesunderfreezethawcyclesandchemicalerosion |