Experimental Study on Unconfined Compressive Strength of Basalt Fiber Reinforced Clay Soil

Gao, Lei; Hu, Guohui; Xu, Nan; Fu, Jing-Li; Xiang, Chao; Yang, Chen

doi:10.1155/2015/561293

Cited by 68 publications

(38 citation statements)

References 15 publications

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“…Vidal first proposed the concept of soil modification in the 1960s [1]. This technology has been developed rapidly and is now widely used in roadbeds, retaining walls, anti-seismic infrastructures, and other fields [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Consolidation Properties of Nano-Bentonite Mixed Clayey Soil

et al. 2020

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As a new soil improvement method, adding nano-bentonite can enhance the engineering properties of soil. To study the stabilization effect of nano-bentonite on soil consolidation properties, a series of one-dimensional odometer tests were conducted on a clayey soil with different nano-bentonite mixing contents (i.e., 0.5%, 1%, 1.5%, and 2%). The effects of nano-bentonite on the coefficient of consolidation and permeability of the test soil were analyzed. The results show that adding a certain amount of nano-bentonite does not significantly affect the original consolidation characteristics of soil samples, but displays a notable effect on accelerating water drainage. Among all the soil samples, when the nano-bentonite mixing content is 0.5%, the final compression amount is the largest and the final void ratio is the smallest. The coefficients of consolidation and permeability increase with increasing nano-bentonite mixing content under high stress state. The test results indicate that nano-bentonite can facilitate internal cementation of soil particles, which effectively reduces the compressibility of clayey soil.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Consolidation Properties of Nano-Bentonite Mixed Clayey Soil

et al. 2020

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“…It can be observed that the basalt fibers were closely surrounded by soil particles, soil matrix, and cementitious products in Figure 21(c). With the basalt fiber content of 0.6%, the randomly distributed basalt fibers and cemented soil matrix interact with each other and generate a stable internal space structure [27,42]. Consequently, the macroscale mechanical behaviors presented in previous sections have a maximum improvement of cement-fly ash-stabilized soil with 0.6% basalt fiber, which include the enhancements of static compressive strength, dynamic compressive strength, and energy absorption capacity.…”

Section: Microstructure Analysis Of Basalt Fiber-reinforced Cement-flmentioning

confidence: 95%

“…is is an evidence to certify that the excess basalt fiber has a negative effect on the improvement of dynamic compressive strength. e enhancement in dynamic compressive strength can be explained by the following reasons: (1) with the addition of basalt fiber, the interfacial bonding strength between fiber and soil matrix is enhanced [42]; (2) the formation of fiberhydration products-soil mixture provides a better adhesion among soil particles; (3) the stable three-dimensional fibersoil net generated inside the stabilized soil due to the bridging capacity of basalt fiber [27,42]; and (4) the good impact resistance of basalt fiber [27]. erefore, the cementfly ash-stabilized soil has a significant improvement in dynamic compressive strength with the inclusion of basalt fiber.…”

Section: Dynamic Compressive Strengthmentioning

confidence: 99%

Effect of Basalt Fiber Addition on Static‐Dynamic Mechanical Behaviors and Microstructure of Stabilized Soil Compositing Cement and Fly Ash

Cao

Wang

2019

Advances in Civil Engineering

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The purpose of this article is to evaluate the influence of basalt fiber content on the static-dynamic mechanical properties and microstructure of cement-fly ash-stabilized soil. The optimum mixed contents of cement and fly ash were obtained from the results of a series of physical and mechanical experiments. Based on the optimum mixed contents of cement and fly ash, the static-dynamic mechanical performances and microstructure of cement-fly ash-stabilized soil reinforced with basalt fiber were studied by means of the unconfined compression test, dynamic compression test (namely, SHPB test), and SEM test. The results demonstrated that the addition of basalt fiber in cement-fly ash-stabilized soil significantly enhanced the static-dynamic mechanical properties of stabilized soil. With basalt fiber content varying from 0% to 1.2%, the unconfined compressive strength, dynamic compressive strength, dynamic increase factor, and specific energy absorption of stabilized soil showed an upward trend first and a downward trend subsequently. The unconfined compressive strength, dynamic compressive strength, and energy absorption ability have a maximum improvement under the optimum basalt fiber content of 0.6%. In addition, the inclusion of basalt fiber can change the failure pattern of cement-fly ash-stabilized soil. The fractal dimension of broken fragments decreased gradually with the increasing basalt fiber content and increased correspondingly with the increasing impact loading pressure. With the basalt fiber content of 0.6%, a stable internal space structure produced inside stabilized soil. However, there are many fiber-fiber weak interfaces that appeared inside stabilized soil under the basalt fiber content of 1.2%. The microstructural observations can be considered as the good interpretations to verify the macroscopic mechanical characteristics.

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“…e results indicated that with a fiber length of 10 mm and content of 1.0%, sisal fiberreinforced silty clay is 20% stronger than nonreinforced silty clay. Gao et al [12] performed a series of unconfined compressive strength tests on clay soil reinforced with basalt fibers under the condition of optimum water content and maximum dry density. Experimental results showed that basalt fibers can effectively improve the unconfined compression strength of clay soil.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Mechanical Behaviors of Fiber-Reinforced Fly Ash-Soil Mixture

Zhang

Xiao

et al. 2019

Advances in Materials Science and Engineering

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In recent years, applications of different types of solid waste in fiber-reinforced soil are developed to improve the strength of soil. This study presents an experimental investigation of mechanical properties of polypropylene fiber-reinforced fly ash-soil mixtures. A series of direct shear tests and unconfined compression tests were carried out. The effects of fly ash content and fiber content on compaction characteristics, shear strength, strength parameters, and unconfined compressive strength of the reinforced soil are investigated and discussed. Results reveal that when the fly ash content of the specimen exceeds 20% and the curing period exceeds 14 days, specimens become more brittle in the unconfined compression tests. It can be deduced that 30% fly ash and 1% fiber provide the optimum content, and the inclusion of fiber reinforcement has positive benefits on the mechanical properties of the reinforced soil to a certain extent.

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Experimental Study on Unconfined Compressive Strength of Basalt Fiber Reinforced Clay Soil

Cited by 68 publications

References 15 publications

Experimental Investigation of Consolidation Properties of Nano-Bentonite Mixed Clayey Soil

Experimental Investigation of Consolidation Properties of Nano-Bentonite Mixed Clayey Soil

Effect of Basalt Fiber Addition on Static‐Dynamic Mechanical Behaviors and Microstructure of Stabilized Soil Compositing Cement and Fly Ash

Experimental Investigation of Mechanical Behaviors of Fiber-Reinforced Fly Ash-Soil Mixture

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