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- Microstructure (4)
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- Contaminated soil (1)
- Earthen sites (1)
- Expansive soil (1)
- Freeze-thaw cycle (1)
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- Temperature effect (1)
- Unconfined compressive strength (UCS) (1)
- Vapor equilibrium technique (1)
- Water retention capacity (1)
Articles 1 - 6 of 6
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Temperature Effect On Water Retention Capacity Of Nanning Expansive Soil And Its Microscopic Mechanism, Zhao-Tian Zeng, Zhe-Qi Cui, De-An Sun, Zhi Yao, Bin Pan
Temperature Effect On Water Retention Capacity Of Nanning Expansive Soil And Its Microscopic Mechanism, Zhao-Tian Zeng, Zhe-Qi Cui, De-An Sun, Zhi Yao, Bin Pan
Rock and Soil Mechanics
To explore the variation of water retention capacity of expansive soil at different temperatures, the calibration curves of Whatman No.42 filter paper were measured by vapor equilibrium method at 5, 25, 40 ℃ and 60 ℃, and the bilinear calibration equation considering temperature effect was established. The results show that the water retention capacity of the filter paper decreases with the increase of temperature, and the effect on the high suction section of calibration curve is weaker than the low suction section. On this basis, Nanning expansive soil is taken as the research object, and the soil-water characteristic curves of …
Strength Deterioration Characteristics Of Lime-Metakaolin Improved Earthen Site Soil Under Freeze-Thaw Cycles, Xin-Ming Li, Hao-Yang Zhang, Di Wu, Yan-Rui Guo, Ke-Bin Ren, Yun-Zhi Tan
Strength Deterioration Characteristics Of Lime-Metakaolin Improved Earthen Site Soil Under Freeze-Thaw Cycles, Xin-Ming Li, Hao-Yang Zhang, Di Wu, Yan-Rui Guo, Ke-Bin Ren, Yun-Zhi Tan
Rock and Soil Mechanics
The Central Plains are located in an area that experiences seasonal freeze-thaw cycles, which can have significant effects on the soil structure of soil relics. To determine if lime-metakaolin (L-MK) is a feasible alternative to natural hydraulic lime (NHL) for earth site restoration work, tests were conducted using lime, metakaolin and silty sand from the site as main raw materials. Mass loss, unconfined compressive strength and splitting tensile strength tests were carried out on L-MK improved silty sand soil undergoing different numbers of freeze-thaw cycles to study its strength characteristics in depth. X-ray diffraction (XRD) thermogravimetry (TG), and scanning electron …
Mechanical Properties Of Sand 3d Printed Rock-Like Samples Based On Different Post-Processing Methods, Wei Tian, Xiao-Hui Wang, Wei Yun, Xu Cheng
Mechanical Properties Of Sand 3d Printed Rock-Like Samples Based On Different Post-Processing Methods, Wei Tian, Xiao-Hui Wang, Wei Yun, Xu Cheng
Rock and Soil Mechanics
3D printing, a rapid prototyping technology, has great potential for applications in laboratory rock tests, but the low strength and stiffness of 3D printed samples have been one of the key problems that need to be addressed. In order to find a way to enhance the strength and stiffness of 3D printed rock-like samples, GS19 sand and furan resin were selected as printing materials, and sand 3D printed rock-like samples were used as research objects. Based on this, the samples were post-processed using three different methods: vacuum infiltration, low-temperature treatment, and combination of infiltration and low-temperature. Uniaxial compression tests were …
Effects Of Lead Contamination On Macro-Water Retention And Micro-Structural Evolution Of Loess, Shao-Jie Wen, Wen-Chieh Cheng, Wen-Le Hu
Effects Of Lead Contamination On Macro-Water Retention And Micro-Structural Evolution Of Loess, Shao-Jie Wen, Wen-Chieh Cheng, Wen-Le Hu
Rock and Soil Mechanics
The physical and chemical reactions between heavy metals in landfill leachate and soil may change the microstructure of soil, then the diffusion and migration of heavy metals and other toxic substances, threaten human health and surrounding environment. In order to investigate the effects of heavy metal contamination on macroscopic water retention and microstructure of loess, the soil-water characteristic curves of Pb-contaminated loess were measured by axial translation technique. Characterization of mesoscopic structure changes was clarified by scanning electron microscopy (SEM), mercury injection (MIP), X-ray diffraction (XRD) and Zeta potential. The results show that the air-entry values of Pb-contaminated loess decrease …
Soil-Water Characteristic Of Biochar-Clay Mixture In The Full Suction Range, Ming-Yu Li, Wen-Jing Sun, Qiang Huang, De-An Sun
Soil-Water Characteristic Of Biochar-Clay Mixture In The Full Suction Range, Ming-Yu Li, Wen-Jing Sun, Qiang Huang, De-An Sun
Rock and Soil Mechanics
Soil-water characteristic curve (SWCC) plays an important role in defining the hydro-mechanical behavior of unsaturated soils. Biochar has the properties of porous structure, high specific surface area and high adsorption. The hydraulic characteristics of biochar-amended soil may change due to the influence of natural environmental factors when applied as the cover layer of landfills. In order to study the effect of biochar content on the water retention behavior of biochar-clay mixture in full suction range, the suction of samples was controlled by vapor equilibrium technique (suction range 3–368 MPa), filter paper method (suction range 0–40 MPa) and pressure plate method …
Mechanical Properties Of Slag-Fly Ash Based Geopolymer Stabilized Sandy Soil, Jin-Jin Zhang, Bo Li, Chuang Yu, Mao-Yu Zhang
Mechanical Properties Of Slag-Fly Ash Based Geopolymer Stabilized Sandy Soil, Jin-Jin Zhang, Bo Li, Chuang Yu, Mao-Yu Zhang
Rock and Soil Mechanics
Silicate cement as a conventional soil curing agent has problems of high energy consumption and high emissions, and researchers have been seeking a more economical and environmentally friendly alternative to cement. In this study, geopolymers based on ground granulated blast-furnace slag (GGBS) and fly ash (FA) were used to reinforce sandy soils, and the effects of different factors on the mechanical properties of geopolymer stabilized sandy soils were investigated by adjusting the type and ratio of exciter, slag-fly ash ratio, water-cement ratio, and curing conditions. The specimens were studied in depth by unconfined compressive strength (UCS) test, electron computed tomography …