Mechanical Properties and Structural Evolution of Sludge-cured Lightweight Soils Subjected to Freeze-thaw Cycles
文献类型：期刊论文
| 作者 | Yang, Aiwu1; Yang, Shaopeng1; Zhong, Xiaokai2; Zhang, Xianwei3 |
| 刊名 | KSCE JOURNAL OF CIVIL ENGINEERING
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 26期号:11页码:4478 |
| 关键词 | Freeze-thaw cycles Sludge-solidified lightweight soil Structural Quantitative parameter Compressive modulus |
| ISSN号 | 1226-7988 |
| 英文摘要 | The rational and effective disposal of sludge has always been a key topic of interest. Freeze-thaw cycles can change the mechanical properties and structural characteristics of soils, leading to a range of engineering geological problems. The sludge curing technology can be used to transform municipal sludge into a new type of sludge-cured lightweight soil. The effects of the number of freeze-thaw cycles and freezing temperature on the unconfined compressive strength and compression modulus of the improved sludge-solidified lightweight soil were investigated by unconfined compressive strength and one-dimensional compression tests. A structural quantitative parameter that considers the freeze-thaw cycles, i.e., the freeze-thaw structural potential, is proposed. The variation pattern of the freeze-thaw structural potential under the influence of different factors was analysed. The test results show that the strength and compression modulus initially rapidly decreased, and then tended to be stable with the increase in the number of freeze-thaw cycles. A lower freezing temperature led to smaller strength and compression modulus. The first two freeze-thaw cycles had a greater influence on the freeze-thaw structure potential. The influence of freezing temperature on the freeze-thaw structural potential is significant when the pressure and number of freeze-thaw cycles are small, and diminishes as the pressure and number of freeze-thaw cycles increase. It was found that there was a good non-linear relationship between the freeze-thaw structural potential and both the unconfined compressive strength and compressive modulus. On this basis, models for the freeze-thaw structural potential as a function of the unconfined compressive strength and compression modulus, taking into account the effects of freezing temperature and the number of freeze-thaw cycles, are proposed respectively, and the accuracy of the models is further verified. The results can provide a reference for the applications of solidified light soil in various fields including engineering fillings in seasonally frozen areas. |
| 学科主题 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000850764700002 |
| 出版者 | KOREAN SOCIETY OF CIVIL ENGINEERS-KSCE |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35153]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China 2.Key Laboratory of Soft Soil Characteristics and Engineering Environment of Tianjin, Tianjin Chengjian University, Tianjin 300384, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China |
| 推荐引用方式 GB/T 7714 | Yang, Aiwu,Yang, Shaopeng,Zhong, Xiaokai,et al. Mechanical Properties and Structural Evolution of Sludge-cured Lightweight Soils Subjected to Freeze-thaw Cycles[J]. KSCE JOURNAL OF CIVIL ENGINEERING,2022,26(11):4478. |
| APA | Yang, Aiwu,Yang, Shaopeng,Zhong, Xiaokai,&Zhang, Xianwei.(2022).Mechanical Properties and Structural Evolution of Sludge-cured Lightweight Soils Subjected to Freeze-thaw Cycles.KSCE JOURNAL OF CIVIL ENGINEERING,26(11),4478. |
| MLA | Yang, Aiwu,et al."Mechanical Properties and Structural Evolution of Sludge-cured Lightweight Soils Subjected to Freeze-thaw Cycles".KSCE JOURNAL OF CIVIL ENGINEERING 26.11(2022):4478. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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