Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and Lime
Expansive soil has harmful effect on engineering. Rice husk ash (RHA) has high pozzolanic activity, so it can form new cementing material with lime or cement to solidify soil. In this paper, the tests of free expansion rate, water ratio limit, and optimum moisture content (OMC) are carried out; then...
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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/10.1155/2020/9646205 |
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| _version_ | 1832550858863149056 |
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| author | Jinrong Ma Yunhe Su Yuyi Liu Xiangling Tao |
| author_facet | Jinrong Ma Yunhe Su Yuyi Liu Xiangling Tao |
| author_sort | Jinrong Ma |
| collection | DOAJ |
| description | Expansive soil has harmful effect on engineering. Rice husk ash (RHA) has high pozzolanic activity, so it can form new cementing material with lime or cement to solidify soil. In this paper, the tests of free expansion rate, water ratio limit, and optimum moisture content (OMC) are carried out; then, RHA and lime were added to artificial soil in different proportions of 5, 10, 15, and 20% by weight, in which the ratio of RHA to lime is 80 : 20. The unconfined compressive strength (UCS) in different curing age is measured, and the improvement effect of RHA and lime to expansive soil can be obtained. Finally, the reason of improvement effect is explained by using the scanning electron microscope (SEM). The results of the study show that (1) for the best utilization effect, the optimum percentage of RHA is 12% and lime is 3%; (2) the UCS is 2.6 times of the pure soil after curing of 14 d under the optimum percentage; (3) the curing age has a significant effect on strength; (4) the main reason for the strength increase of the modified soil is that the crystal produced by the pozzolanic activity fills the pores of the soil. |
| format | Article |
| id | doaj-art-bc253e0f0a6c4da6994470d2cbb9e187 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-bc253e0f0a6c4da6994470d2cbb9e1872025-02-03T06:05:46ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/96462059646205Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and LimeJinrong Ma0Yunhe Su1Yuyi Liu2Xiangling Tao3State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaAnhui Huizhou Geology Security Institute Co., Ltd., Hefei 230000, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaExpansive soil has harmful effect on engineering. Rice husk ash (RHA) has high pozzolanic activity, so it can form new cementing material with lime or cement to solidify soil. In this paper, the tests of free expansion rate, water ratio limit, and optimum moisture content (OMC) are carried out; then, RHA and lime were added to artificial soil in different proportions of 5, 10, 15, and 20% by weight, in which the ratio of RHA to lime is 80 : 20. The unconfined compressive strength (UCS) in different curing age is measured, and the improvement effect of RHA and lime to expansive soil can be obtained. Finally, the reason of improvement effect is explained by using the scanning electron microscope (SEM). The results of the study show that (1) for the best utilization effect, the optimum percentage of RHA is 12% and lime is 3%; (2) the UCS is 2.6 times of the pure soil after curing of 14 d under the optimum percentage; (3) the curing age has a significant effect on strength; (4) the main reason for the strength increase of the modified soil is that the crystal produced by the pozzolanic activity fills the pores of the soil.http://dx.doi.org/10.1155/2020/9646205 |
| spellingShingle | Jinrong Ma Yunhe Su Yuyi Liu Xiangling Tao Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and Lime Advances in Civil Engineering |
| title | Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and Lime |
| title_full | Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and Lime |
| title_fullStr | Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and Lime |
| title_full_unstemmed | Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and Lime |
| title_short | Strength and Microfabric of Expansive Soil Improved with Rice Husk Ash and Lime |
| title_sort | strength and microfabric of expansive soil improved with rice husk ash and lime |
| url | http://dx.doi.org/10.1155/2020/9646205 |
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