Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining Agent
To control pores in the backfill, the air-entraining agents (AEAs) are used as an admixture to realize the pore structure changes under artificial action and explore the effect of pore structure on strength. Two AEAs at different dosages were added to the backfill. The relationship was then analyzed...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6694744 |
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| _version_ | 1832559713975271424 |
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| author | Fengwen Zhao Jianhua Hu Dongjie Yang Ye Kuang Hongxing Xiao Minghua Zheng Xueliang Wang |
| author_facet | Fengwen Zhao Jianhua Hu Dongjie Yang Ye Kuang Hongxing Xiao Minghua Zheng Xueliang Wang |
| author_sort | Fengwen Zhao |
| collection | DOAJ |
| description | To control pores in the backfill, the air-entraining agents (AEAs) are used as an admixture to realize the pore structure changes under artificial action and explore the effect of pore structure on strength. Two AEAs at different dosages were added to the backfill. The relationship was then analyzed between them from the macro- and mesoscopic aspects. The results indicate that AEA can regulate pore structure changes of AEACPB. With the increase in AEA content, the total pore volume of different pore sizes in AEACPB increases, in which the proportion of big and medium pore gradually increases while the proportion of small pore gradually decreases. The AEACPB’s UCS is linearly negatively correlated with the porosity and pore percentage, which is the primary factor affecting the AEACPB of the pore structure. When the total pores’ volume in the AEACPB is constant, the influence of different pore structures differs. A higher proportion of small pores leads to a linear increase in strength; a higher proportion of medium pores leads to a linear decrease in strength; and a higher proportion of big pores leads to an exponential decrease in strength. And the fractal dimension has a linear negative correlation with the UCS by fractal theory analysis. |
| format | Article |
| id | doaj-art-a7137f46ea1c4eb48632e3b892230498 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-a7137f46ea1c4eb48632e3b8922304982025-02-03T01:29:22ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66947446694744Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining AgentFengwen Zhao0Jianhua Hu1Dongjie Yang2Ye Kuang3Hongxing Xiao4Minghua Zheng5Xueliang Wang6School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410081, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410081, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410081, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410081, ChinaHubei Sanning Mining Co., Ltd., Yichang, Hubei 443100, ChinaHubei Sanning Mining Co., Ltd., Yichang, Hubei 443100, ChinaHubei Sanning Mining Co., Ltd., Yichang, Hubei 443100, ChinaTo control pores in the backfill, the air-entraining agents (AEAs) are used as an admixture to realize the pore structure changes under artificial action and explore the effect of pore structure on strength. Two AEAs at different dosages were added to the backfill. The relationship was then analyzed between them from the macro- and mesoscopic aspects. The results indicate that AEA can regulate pore structure changes of AEACPB. With the increase in AEA content, the total pore volume of different pore sizes in AEACPB increases, in which the proportion of big and medium pore gradually increases while the proportion of small pore gradually decreases. The AEACPB’s UCS is linearly negatively correlated with the porosity and pore percentage, which is the primary factor affecting the AEACPB of the pore structure. When the total pores’ volume in the AEACPB is constant, the influence of different pore structures differs. A higher proportion of small pores leads to a linear increase in strength; a higher proportion of medium pores leads to a linear decrease in strength; and a higher proportion of big pores leads to an exponential decrease in strength. And the fractal dimension has a linear negative correlation with the UCS by fractal theory analysis.http://dx.doi.org/10.1155/2021/6694744 |
| spellingShingle | Fengwen Zhao Jianhua Hu Dongjie Yang Ye Kuang Hongxing Xiao Minghua Zheng Xueliang Wang Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining Agent Advances in Civil Engineering |
| title | Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining Agent |
| title_full | Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining Agent |
| title_fullStr | Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining Agent |
| title_full_unstemmed | Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining Agent |
| title_short | Study on the Relationship between Pore Structure and Uniaxial Compressive Strength of Cemented Paste Backfill by Using Air-Entraining Agent |
| title_sort | study on the relationship between pore structure and uniaxial compressive strength of cemented paste backfill by using air entraining agent |
| url | http://dx.doi.org/10.1155/2021/6694744 |
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