碳酸钙纳米材料固化土在路基中的物理性质变化

IF 0.7 4区 材料科学 Q3 Materials Science
Guoying Guo, Xin Li, Wenjun Guo, Ling Yang, Wei Wang
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引用次数: 0

摘要

利用适当的材料来增强路基的物理特性对于当前的交通建设和维护至关重要。本研究提出了一种采用纳米碳酸钙材料的固化方法,以解决路基土壤位移和沉降问题。研究中还开发了一种方法来探索最佳固化材料配比。此外,该研究还开发了一种方法,用于测试和分析用纳米材料固化的土壤的力学性能,包括拉伸应力、三轴剪切应力和摩尔损伤包络的测量。研究表明,用碳酸钙纳米材料处理的土壤在固化剂掺量为 6% 的情况下,固化 7 天后的无压抗压强度为 0.40 兆帕。将掺量提高到 18% 后,土壤的破坏荷载达到 0.100 kN。此外,当固化剂掺量为 6% 时,土壤的三轴剪切应力-应变曲线在线性阶段的斜率为 264.47。固化剂掺量为 6% 时,土壤三轴剪切应力-应变曲线线性阶段的斜率为 264.47。在固化剂掺量相同的情况下,固化土摩尔包线的内摩擦角为 22.66 度。对使用固化土替代路基的位移分析表明,使用该研究方法填筑路堤后,观察到的最大位移仅为 377 毫米。实验结果支持了该研究的假设,即纳米碳酸钙颗粒的应用可显著提高路基的物理特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The change of physical properties of calcium carbonate nanomaterials cured soil in road substrates
The utilization of appropriate materials to enhance road subgrade’s physical characteristics is crucial for current transportation construction and maintenance. This study proposes a curing method that employs calcium carbonate nanomaterials to address the problem of soil displacement and settlement in roadway subgrades. A method was developed during the study to explore the optimal curing material ratio. Additionally, this study developed a method for testing and analyzing the mechanical properties of soils cured with nanomaterials, including measures of tensile stress, triaxial shear stress, and Moore’s damage envelope. The study demonstrated that the unconfined compressive strength of the soil treated with calcium carbonate nanomaterials was 0.40 MPa after 7 days of curing with a 6% doping of the curing agent. Increasing the doping to 18% resulted in a breaking load of the soil reaching 0.100 kN. Furthermore, the triaxial shear stress–strain curve of the soil exhibited a slope of 264.47 during the linear phase when the curing agent was dosed at 6%. The slope of the linear phase of the stress–strain curve for triaxial shear at 6% curing agent doping was found to be 264.47. The cured soil molar pack line exhibited an internal friction angle of 22.66 degrees at the same curing agent dosage. The displacement analysis of the replacement roadbed with cured soil revealed a maximum observed displacement of only 377 mm after filling the embankment using the study method. The experimental results provide support for the hypothesis of the study, which suggests that the application of calcium carbonate nanoparticles can significantly enhance the physical characteristics of road subgrade.
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来源期刊
Materials Express
Materials Express NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
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69
审稿时长
>12 weeks
期刊介绍: Information not localized
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