Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, China
The organic soil is widely distributed around Dianchi Lake in Kunming, which is rich in the humic group (HG). In order to explore the effect of HG on the strength development of organic soil, this paper adopts the method of adding humic acid (HA) reagent into the undisturbed cohesive soil (blending...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/3884337 |
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| author | Siyang Huang Jing Cao Cheng Kong Yue Gao Yunfei Song Fangyi Liu Huafeng Sun Zhengcong Lai Weiming Zhu Hanhua Xu |
| author_facet | Siyang Huang Jing Cao Cheng Kong Yue Gao Yunfei Song Fangyi Liu Huafeng Sun Zhengcong Lai Weiming Zhu Hanhua Xu |
| author_sort | Siyang Huang |
| collection | DOAJ |
| description | The organic soil is widely distributed around Dianchi Lake in Kunming, which is rich in the humic group (HG). In order to explore the effect of HG on the strength development of organic soil, this paper adopts the method of adding humic acid (HA) reagent into the undisturbed cohesive soil (blending method) and soaking it in fulvic acid (FA) solution (steeping method) to simulate the organic soil. Then, the effect of HG on soil is analyzed by the unconfined compressive strength (UCS) and the scanning electron microscope (SEM) tests. The UCS test shows that HA can significantly reduce the UCS of the samples, and it continues to decrease with the increase of the HA reagent content. FA can substantially enhance the UCS of the samples, which continues to increase with the concentration of FA solution (decreasing the pH value). Under each HG condition, the steeping of FA can significantly increase the UCS of the sample when the content of the HA reagent is less than 10%, and the growth rate of the UCS decreases when it is greater than 10%. With the increase of steeping age, the UCS of the 5% HA samples continued to increase and gradually became stable, and when the content of the HA reagent is more than 5%, the UCS curve first increases and then decreases. The SEM test shows that adding HA reagent can significantly increase the pore size, improve the connectivity between the pores, and weaken the connection of the soil structure. The steeping of FA can reduce the pore size, weaken the connectivity between the pores, and strengthen the connection of the sample structure. |
| format | Article |
| id | doaj-art-22fbf5f48de8469eb8bf86dc7e4cdb06 |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-22fbf5f48de8469eb8bf86dc7e4cdb062025-08-20T03:54:48ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/3884337Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, ChinaSiyang Huang0Jing Cao1Cheng Kong2Yue Gao3Yunfei Song4Fangyi Liu5Huafeng Sun6Zhengcong Lai7Weiming Zhu8Hanhua Xu9Faculty of Civil Engineering and MechanicsFaculty of Civil Engineering and MechanicsPowerChina Kunming Engineering Corporation LimitedShenzhen Geotechnical Investigation & Surveying Institute (Group) Ltd.Faculty of Civil Engineering and MechanicsFaculty of Civil Engineering and MechanicsFaculty of Civil Engineering and MechanicsFaculty of Civil Engineering and MechanicsFaculty of Civil Engineering and MechanicsKunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.The organic soil is widely distributed around Dianchi Lake in Kunming, which is rich in the humic group (HG). In order to explore the effect of HG on the strength development of organic soil, this paper adopts the method of adding humic acid (HA) reagent into the undisturbed cohesive soil (blending method) and soaking it in fulvic acid (FA) solution (steeping method) to simulate the organic soil. Then, the effect of HG on soil is analyzed by the unconfined compressive strength (UCS) and the scanning electron microscope (SEM) tests. The UCS test shows that HA can significantly reduce the UCS of the samples, and it continues to decrease with the increase of the HA reagent content. FA can substantially enhance the UCS of the samples, which continues to increase with the concentration of FA solution (decreasing the pH value). Under each HG condition, the steeping of FA can significantly increase the UCS of the sample when the content of the HA reagent is less than 10%, and the growth rate of the UCS decreases when it is greater than 10%. With the increase of steeping age, the UCS of the 5% HA samples continued to increase and gradually became stable, and when the content of the HA reagent is more than 5%, the UCS curve first increases and then decreases. The SEM test shows that adding HA reagent can significantly increase the pore size, improve the connectivity between the pores, and weaken the connection of the soil structure. The steeping of FA can reduce the pore size, weaken the connectivity between the pores, and strengthen the connection of the sample structure.http://dx.doi.org/10.1155/2022/3884337 |
| spellingShingle | Siyang Huang Jing Cao Cheng Kong Yue Gao Yunfei Song Fangyi Liu Huafeng Sun Zhengcong Lai Weiming Zhu Hanhua Xu Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, China Advances in Materials Science and Engineering |
| title | Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, China |
| title_full | Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, China |
| title_fullStr | Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, China |
| title_full_unstemmed | Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, China |
| title_short | Study on Strength Development Mechanism of Organic Soil in Dianchi Lake, China |
| title_sort | study on strength development mechanism of organic soil in dianchi lake china |
| url | http://dx.doi.org/10.1155/2022/3884337 |
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