An Experimental Study on Engineering Properties of Rubber Particles-Improved Fly Ash Soil

Li, Chang Yu; Liu, Han Bing; Wei, Hai

doi:10.4028/www.scientific.net/amm.71-78.3401

Cited by 14 publications

(7 citation statements)

References 2 publications

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“…Liu et al [24] also studied the use of fly ash to improve granite residual soils. In their study, they showed that the shear strength of granite residual soil was improved and the permeability coefficient was reduced after a sufficient age of maintenance (e.g., 14 days), and the optimum dosage of fly ash was also 15%.…”

Section: Slope Stability Analysismentioning

confidence: 99%

“…Li et al [23] utilized fly ash to improve sandy soil and found that the incorporation of fly ash into sandy soil can effectively improve the shell capacity of sandy soil. Liu et al [24] mixed granite residual soil and fly ash and found that fly ash effectively enhanced the shell capacity of granite residual soil after treatment. Through conventional indoor tests, microanalysis and other means, Xie et al [25] concluded that fly ash particles improve granite residual soil by occupying large pores in the ground, which gives rise to mutual adhesion.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Improvement of Granite Residual Soil Caused by Fly Ash and Its Slope Stability under Rainfall Conditions

Hu,

Liu

et al. 2024

Applied Sciences

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Granite residual soil has distinctive engineering characteristics due to its unique properties, and the resulting slopes are less stable and less resistant to rain erosion. The granite residual soil was improved by the addition of 5%, 10%, 15% and 20% fly ash, and the effects of fly ash on the intensity index and penetration of granite residual soil were investigated by triaxial strength tests and permeability tests. In combination with scanning electron microscopy measurements, a study of the stability of fly ash-modified granite residual soil slopes by modeling rainfall using the finite element software ABAQUS revealed the following: (1) the permeability coefficients of the residual granitic soils decreased by one order of magnitude when fly ash was added; (2) the improvement in the triaxial strength index of the improved soil was most pronounced when the dosage of fly ash was 15%, so that a dosage of 15% was considered optimal; and (3) numerical simulations concluded that the stability of the slope formed by 15% fly ash-improved soil fill improved significantly relative to the original slope, with the coefficient of safety increasing from 1.06 to 1.42, and the resistance to water seepage also significantly improved.

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Section: Slope Stability Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the Improvement of Granite Residual Soil Caused by Fly Ash and Its Slope Stability under Rainfall Conditions

Hu,

Liu

et al. 2024

Applied Sciences

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“…Finally, all ingredients were mixed evenly after the calculated amount of water was added. According to the previous research of [6][7][8], the modified soil in this mixture ratio has fairly good anti-freeze-thaw stability as a green and sustainable road subgrade material with good performance for seasonal frozen regions. Before testing, the mixture was placed in the humidor for 24 h. The physical indicators of the modified soil are listed in Table 2.…”

Section: Preparation Of the Modified Soilmentioning

confidence: 99%

“…Based on soil stabilization technology, a novel subgrade material that is silty clay modified by fly ash and crumb rubber was proposed by our research group. It has been proven that the modified soil possesses greater performance in conventional physical properties of strength, deformation, and stability, especially after freeze-thaw cycles [6][7][8]. This modified soil is also regarded as a sustainable subgrade material because it disposes and recycles the large amount of industry waste fly ash and rubber products.…”

Section: Introductionmentioning

confidence: 99%

Study on the Vibration Isolation Performance of Composite Subgrade Structure in Seasonal Frozen Regions

2020

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Silty clay modified by fly ash and crumb rubber is a kind of sustainable subgrade filler that has good freeze–thaw resistance stability, but weak vibration isolation performance. The objective of this study was to improve the vibration isolation of the modified soil and investigate the vibration isolation effect of the composite subgrade structure of extruded polystyrene (XPS) plates and the modified soil by the indoor impact test. First, the vibration isolation performance of silty clay, modified soil, and composite subgrade structure was respectively evaluated. Second, the effect of the XPS plate’s thickness and vibration intensity on the vibration performance of the composite subgrade structure were evaluated. Third, the vibration isolation performance of the test groups under the condition of freeze–thaw cycles was assessed. The results show that the vibration isolation performance of the subgrade can be effectively improved by setting XPS plates. The composite subgrade structure has a certain vibration isolation effect, especially in the vertical direction. Considering the vibration isolation performance and costs, 5 cm was the optimum XPS plate thickness. The composite subgrade structure showed a great vibration isolation performance under the condition of freeze–thaw cycles, so it is suitable for application in road subgrade in seasonal frozen regions.

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“…SR and y ash were mixed to produce embankment materials [13]. Fly ash can significantly improve the mechanical properties of SR [14]. SR has a significant effect on the expansion of expansive soil [15].…”

Section: Introductionmentioning

confidence: 99%

Study on Strength Test and Application of Lime Soil in Pavement Base Modified by Soda Residue

Zhu

Yin

et al. 2022

Advances in Civil Engineering

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To solve the difficult problems of large-scale utilization of solid waste soda residue (SR) as a resource and reduce the cost of road building materials, the technical idea of using SR instead of part of lime to prepare lime soil of pavement base was put forward. Through laboratory tests, the basic characteristics of SR and the optimum moisture content and maximum dry density of soda residue lime soil (SRLS) under different proportioning conditions were tested. The test results showed that (1) with the change of SR content in the range of 0%–12%, the optimum moisture content of SRLS showed the change law of first increasing and then decreasing, but the change range was small; (2) the UCS of SRLS gradually increased with the extension of curing age, with the strength increasing faster in the early stage and slower in the later stage. The UCS of SRLS with SR content in the range of 0%–12% shows the law of first increasing and then decreasing, and the UCS value was the highest when the content of SR is 3%. Compared to the control group, the increase in the amplitude of UCS is as high as 34.6%; (3) appropriate content of SR will increase the gelation of C-S-H and N-A-S-H, and at the same time generated hydrated calcium sulfate and other cementitious materials, enhancing the cementation and strength of SRLS. However, when the content of SR is too much, the excess SR will not participate in hydration reaction even reduce the strength of lime soil. The cost of road materials per kilometer in the test section of SRLS base can be saved by 164,000 yuan, and the treatment cost per ton of SR in alkali factory can be reduced by about 80 yuan. The research results have remarkable economic, technical, and social benefits, which can provide technical reference for large-scale recycling of solid waste SR.

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An Experimental Study on Engineering Properties of Rubber Particles-Improved Fly Ash Soil

Cited by 14 publications

References 2 publications

Research on the Improvement of Granite Residual Soil Caused by Fly Ash and Its Slope Stability under Rainfall Conditions

Research on the Improvement of Granite Residual Soil Caused by Fly Ash and Its Slope Stability under Rainfall Conditions

Study on the Vibration Isolation Performance of Composite Subgrade Structure in Seasonal Frozen Regions

Study on Strength Test and Application of Lime Soil in Pavement Base Modified by Soda Residue

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