Effects of Freeze–Thaw Cycles on Strength and Wave Velocity of Lime-Stabilized Basalt Fiber-Reinforced Loess

Wang, Wensong; Cao, Guansen; Li, Ye; Zhou, Yuxi; Lu, Ting; Zheng, Bin; Geng, Weile

doi:10.3390/polym14071465

Cited by 16 publications

(9 citation statements)

References 59 publications

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“…Based upon the W-D cycle tests, soil dynamic triaxial tests, and SEM tests on the loess samples, the dynamic properties of compacted loess were systematically studied under diferent W-D cycles number. Te conclusions were obtained as follows [22]:…”

Section: Discussionmentioning

confidence: 99%

Effect of Wetting and Drying Cycles on the Dynamic Properties of Compacted Loess

Wang

Zhao

Zhang

et al. 2022

Advances in Civil Engineering

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This paper investigates the dynamic properties of compacted loess under wetting and drying (W-D) cycles. A series of tests were conducted on compacted loess samples, namely, the soil dynamic triaxial test and the scanning electron microscopy (SEM) test. The test results showed that the dynamic stress-strain relationship of the compacted loess under the action of W-D cycles accords with the Hardin–Drnevich model. The initial dynamic shear modulus (G0) and the maximum dynamic shear stress (τy) of the compacted loess first decreased and then increased with the number of W-D cycles (n) increasing. The damping ratio (λ) increased linearly with the dynamic strain (εd) increasing in the semilogarithmic coordinate. The defined change rate of the damping ratio (η) first increased and then decreased with the n increasing. The macrostructure and microstructure characteristics of samples in the process of W-D cycles indicate that the increasing number of pores in the humidifying process and the cracks on the surface and inside of samples during dehumidification lead to the structural damage and dynamic properties reduction of compacted loess. The main reasons for structure strengthening and dynamic properties increasing are that soil particle structure develops to mosaic structure, pore structure develops to uniform small pore, and matrix suction makes soil sample tend to be dense.

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Section: Discussionmentioning

confidence: 99%

Effect of Wetting and Drying Cycles on the Dynamic Properties of Compacted Loess

Wang

Zhao

Zhang

et al. 2022

Advances in Civil Engineering

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“…Jia et al [12] discovered that adding basalt fiber strengthens soil, mainly by increasing the cohesion of silty clay to improve the shear strength of soil. Wang et al [13] pointed out that adding lime and basalt fiber increases soil's resistance to frost damage, and enhances its unrestricted compressive strength as the fiber quantity increases. The unconfined compressive strength values of samples with a lime content of 3% and 0.5%, 1%, and 1.5% fiber content increased by 39 kPa, 75 kPa, and 106 kPa, respectively.…”

Section: Introductionmentioning

confidence: 99%

Study on the Shear Strength of Loess Solidified by Guar Gum and Basalt Fiber

Xi,

Sun,

et al. 2024

Materials

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Loess is widely distributed in the northwest and other regions, and its unique structural forms such as large pores and strong water sensitivity lead to its collapsibility and collapse, which can easily induce slope instability. Guar gum and basalt fiber are natural green materials. For these reasons, this study investigated the solidification of loess by combining guar gum and basalt fiber and analyzed the impact of the guar gum content, fiber length, and fiber content on the soil shearing strength. Using scanning electron microscopy (SEM), the microstructure of loess was examined, revealing the synergistic solidification mechanism of guar gum and basalt fibers. On this basis, a shear strength model was established through regression analysis with fiber length, guar gum content, and fiber content. The results indicate that adding guar gum and basalt fiber increases soil cohesion, as do fiber length, guar gum content, and fiber content. When the fiber length was 12 mm, the fiber content was 1.00%, and the guar gum content was equal to 0.50%, 0.75%, or 1.00%, the peak strength of the solidified loess increased by 82.80%, 85.90%, and 90.40%, respectively. According to the shear strength model, the predicted and test data of the shear strength of solidified loess are evenly distributed on both sides of parallel lines, indicating a good fit. These findings are theoretically significant and provide practical guidance for loess solidification engineering.

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“…The cement soil's peak and residual strengths increase with the fibers' content [23]. For fiber-reinforced loess, the main research elements were: unconfined compressive strength under dry and wet cycles and freeze-thaw cycles [24,25]; unconfined compressive strength [26,27]; triaxial shear behaviors [28][29][30]. The research method mainly uses the control variables method, which examines changes in the level of each independent variable while the other variables are held constant.…”

Section: Introductionmentioning

confidence: 99%

Effect of Polypropylene Fiber on the Unconfined Compressive Strength of Loess with Different Water Content

Ni¹,

Zhong²,

Wang³

2023

Journal of Renewable Materials

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Fiber-reinforced soils have been of great interest to experimenters for building foundations' strength performance, time, and economy. This paper investigates the effects of water content and polypropylene fiber dosage and length on loess's unconfined compressive strength (UCS) according to the central composite response surface design test procedure. The water content is 11%-25%, the mass ratio of fiber to soil is 0.1%-0.9%, and the fiber length ranges from 6-18 mm. The response surface method (RSM) developed full quadratic models of different variables with response values. After analysis of variance (ANOVA), the mathematical model developed in this study was statistically significant (p ≤ 0.05) and applicable to the optimization process. The optimization results showed that the optimal water content values, fiber amount, and fiber length were 16.41%, 0.579%, and 14.90 mm, respectively. The unconfined compressive strength of the optimized specimens was increased by 288.017 kPa. The research results can reference the design and construction of fiber-reinforced soil in practical projects such as road base engineering and foundation engineering.

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Effects of Freeze–Thaw Cycles on Strength and Wave Velocity of Lime-Stabilized Basalt Fiber-Reinforced Loess

Cited by 16 publications

References 59 publications

Effect of Wetting and Drying Cycles on the Dynamic Properties of Compacted Loess

Effect of Wetting and Drying Cycles on the Dynamic Properties of Compacted Loess

Study on the Shear Strength of Loess Solidified by Guar Gum and Basalt Fiber

Effect of Polypropylene Fiber on the Unconfined Compressive Strength of Loess with Different Water Content

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