Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl
Expansive soil experiences periodic swelling and shrinkage during the alternate wet and dry environments, which will result in severe damage to the slope stability. In this study, a promising modifier OTAC-KCl is introduced, which has a good diffusivity and is soluble in water or other solvents easi...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/304276 |
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| _version_ | 1832565172057669632 |
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| author | Bao-tian Wang Can-hong Zhang Xue-lian Qiu En-yue Ji Wen-hui Zhang |
| author_facet | Bao-tian Wang Can-hong Zhang Xue-lian Qiu En-yue Ji Wen-hui Zhang |
| author_sort | Bao-tian Wang |
| collection | DOAJ |
| description | Expansive soil experiences periodic swelling and shrinkage during the alternate wet and dry environments, which will result in severe damage to the slope stability. In this study, a promising modifier OTAC-KCl is introduced, which has a good diffusivity and is soluble in water or other solvents easily. Firstly, a reasonable combination of ameliorant 0.3% STAC and 3% KCl is chosen referring to the free swell test. Then, the best curing period, 14 days, is gotten from UCS tests. The effect of wetting and drying cycles on engineering properties of expansive soil improved by OTAC-KCl admixtures after 14-day curing is also studied accordingly. Both treated and untreated expansive soil samples are prepared for the cyclic wetting-drying tests which mainly include cyclic swelling potential and cyclic strength tests. Experimental results show that the swelling potential of expansive soil samples stabilized with OTAC-KCl is suppressed efficiently, and the untreated soil specimens will collapse when immersed in water while the treated specimens keep in good conditions. Moreover, expansive soil samples modified with 0.3% OTAC + 3% KCl show enough durability on the swelling ability, shear strength, and unconfined compressive strength, which means, that both the physical and the mechanical properties of stabilized expansive soil have been improved effectively. |
| format | Article |
| id | doaj-art-7729efe9fc7e46d2a2f4aab26745b649 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-7729efe9fc7e46d2a2f4aab26745b6492025-02-03T01:09:00ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/304276304276Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KClBao-tian Wang0Can-hong Zhang1Xue-lian Qiu2En-yue Ji3Wen-hui Zhang4Key Laboratory of Ministry of Education for Geotechnics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, ChinaKey Laboratory of Ministry of Education for Geotechnics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, ChinaChina Coal Technology and Engineering Group, Nanjing Design and Research Institute Co. Ltd., Nanjing, Jiangsu 210031, ChinaKey Laboratory of Ministry of Education for Geotechnics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, ChinaKey Laboratory of Ministry of Education for Geotechnics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, ChinaExpansive soil experiences periodic swelling and shrinkage during the alternate wet and dry environments, which will result in severe damage to the slope stability. In this study, a promising modifier OTAC-KCl is introduced, which has a good diffusivity and is soluble in water or other solvents easily. Firstly, a reasonable combination of ameliorant 0.3% STAC and 3% KCl is chosen referring to the free swell test. Then, the best curing period, 14 days, is gotten from UCS tests. The effect of wetting and drying cycles on engineering properties of expansive soil improved by OTAC-KCl admixtures after 14-day curing is also studied accordingly. Both treated and untreated expansive soil samples are prepared for the cyclic wetting-drying tests which mainly include cyclic swelling potential and cyclic strength tests. Experimental results show that the swelling potential of expansive soil samples stabilized with OTAC-KCl is suppressed efficiently, and the untreated soil specimens will collapse when immersed in water while the treated specimens keep in good conditions. Moreover, expansive soil samples modified with 0.3% OTAC + 3% KCl show enough durability on the swelling ability, shear strength, and unconfined compressive strength, which means, that both the physical and the mechanical properties of stabilized expansive soil have been improved effectively.http://dx.doi.org/10.1155/2015/304276 |
| spellingShingle | Bao-tian Wang Can-hong Zhang Xue-lian Qiu En-yue Ji Wen-hui Zhang Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl Advances in Materials Science and Engineering |
| title | Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl |
| title_full | Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl |
| title_fullStr | Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl |
| title_full_unstemmed | Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl |
| title_short | Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl |
| title_sort | research on wetting drying cycles effect on the physical and mechanical properties of expansive soil improved by otac kcl |
| url | http://dx.doi.org/10.1155/2015/304276 |
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