Experimental Study on Unconsolidated Undrained Shear Strength Characteristics of Synthetic Cotton Fiber Reinforced Soil

Liu, Jianlong; Hou, Tian-shun; Luo, Yi; Cui, Yi-xiang

doi:10.1007/s10706-019-01129-z

Cited by 28 publications

(15 citation statements)

References 11 publications

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“…A considerable improvement appeared in the FAS specimen, even the 0.5% FC admixture of PP fiber. A similar phenomenon was also presented in these studies [ 16 , 37 , 46 ], in which physical friction occurred between FAS particles and PP fibers. FC and FL can both contribute increasingly to shear strength value, as in the low FC and FL reinforced FAS specimen, a fiber net failed to be constituted because of the major gap between fibers; as the FC and FL are going higher, FAS particles find it difficult to make contact with the fiber, and even a “floating” state is then present in fiber construction [ 46 ].…”

Section: Discussionsupporting

confidence: 84%

“…A similar phenomenon was also presented in these studies [ 16 , 37 , 46 ], in which physical friction occurred between FAS particles and PP fibers. FC and FL can both contribute increasingly to shear strength value, as in the low FC and FL reinforced FAS specimen, a fiber net failed to be constituted because of the major gap between fibers; as the FC and FL are going higher, FAS particles find it difficult to make contact with the fiber, and even a “floating” state is then present in fiber construction [ 46 ]. Displacement dislocation happened when subject to axial stress due to the elastic modulus of PP fiber being higher than the FAS specimen, leading to a non-consecutive deformation.…”

Section: Discussionsupporting

confidence: 84%

“…This may be because the FL 6 mm PP fibers are too short to form a more robust structure. The FAS specimens with FL 12 mm and 24 mm fibers depict a phenomenon that shear strength is not increased with the large fiber length in the end [ 37 , 46 ]. For example, under 200 kPa confining stress and FC 1%, the deviator stress increases from 539.6 to 689.4 kPa as the FL is elongated from 6 mm to 12 mm.…”

Section: Test Results and Discussionmentioning

confidence: 99%

“…Under the unconsolidated undrained experiment condition, the effective stress circles of the saturated soil are overlapped with each other, which implies that the strength envelope of the total stress circle is a horizontal line (as shown in Figure 10 ) [ 46 ]. The UU triaxial test results of saturated soil are usually analyzed by the Mohr–Coulomb strength theory, and the intercept of the strength envelope on the vertical axis is the shear strength, termed

.…”

Section: Test Results and Discussionmentioning

confidence: 99%

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The Triaxial Test of Polypropylene Fiber Reinforced Fly Ash Soil

Zhang

Xiao

et al. 2022

Materials

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Recently, soil reinforcement using arranged or randomly distributed fibers has attracted increasing attention in geotechnical engineering. In this study, polypropylene (PP) fibers with three lengths (6, 12, and 24 mm) and three mass percentages (0.5%, 1%, and 1.5%) were used to reinforce a coal fly ash soil (FAS) mixture. Unconsolidated, undrained triaxial tests were carried out in order to study the mechanical properties of the polypropylene fiber-reinforced FAS mixture and evaluate the impact of fiber on the shear strength of the FAS mixture. It is found that the fiber length of 12 mm could significantly improve the shear strength of the polypropylene fiber reinforced FAS mixture, and little effect is shown on the shear strength while using a fiber length of 24 mm. Additional fibers enhance the energy absorption capacity of the FAS specimens and therefore the highest energy absorption capacity occurs when the fiber content is 1% and the fiber length is 12 mm. The peak deviator stress enhances impressively with the addition of polypropylene fiber. The impact of fiber on the peak deviator stress is the largest when fiber content is within 1.0%. The fiber length has little effect on the peak deviator stress when it exceeds 12 mm.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionsupporting

confidence: 84%

Section: Test Results and Discussionmentioning

confidence: 99%

.…”

Section: Test Results and Discussionmentioning

confidence: 99%

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The Triaxial Test of Polypropylene Fiber Reinforced Fly Ash Soil

Zhang

Xiao

et al. 2022

Materials

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“…Reference [74] reported that biopolymers have found useful applications in soil amendment. The strength of cotton fibre-reinforced soil was found to increase compared with unreinforced soil [75]. Sadrolodabaeea, Claramunt [76] fabricated composite materials from short fibre textile materials from cotton wastes for building insulations.…”

Section: Geotechnical Applicationsmentioning

confidence: 99%

Cotton Wastes Functionalized Biomaterials from Micro to Nano: A Cleaner Approach for a Sustainable Environmental Application

et al. 2021

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The exponential increase in textile cotton wastes generation and the ineffective processing mechanism to mitigate its environmental impact by developing functional materials with unique properties for geotechnical applications, wastewater, packaging, and biomedical engineering have become emerging global concerns among researchers. A comprehensive study of a processed cotton fibres isolation technique and their applications are highlighted in this review. Surface modification of cotton wastes fibre increases the adsorption of dyes and heavy metals removal from wastewater. Cotton wastes fibres have demonstrated high adsorption capacity for the removal of recalcitrant pollutants in wastewater. Cotton wastes fibres have found remarkable application in slope amendments, reinforcement of expansive soils and building materials, and a proven source for isolation of cellulose nanocrystals (CNCs). Several research work on the use of cotton waste for functional application rather than disposal has been done. However, no review study has discussed the potentials of cotton wastes from source (Micro-Nano) to application. This review critically analyses novel isolation techniques of CNC from cotton wastes with an in-depth study of a parameter variation effect on their yield. Different pretreatment techniques and efficiency were discussed. From the analysis, chemical pretreatment is considered the most efficient extraction of CNCs from cotton wastes. The pretreatment strategies can suffer variation in process conditions, resulting in distortion in the extracted cellulose’s crystallinity. Acid hydrolysis using sulfuric acid is the most used extraction process for cotton wastes-based CNC. A combined pretreatment process, such as sonication and hydrolysis, increases the crystallinity of cotton-based CNCs. The improvement of the reinforced matrix interface of textile fibres is required for improved packaging and biomedical applications for the sustainability of cotton-based CNCs.

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Experimental study on the performance of the modified loess by polypropylene fiber mixed with bentonite and cement

Yuan

Lü

et al. 2022

Bull Eng Geol Environ

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Experimental Study on Unconsolidated Undrained Shear Strength Characteristics of Synthetic Cotton Fiber Reinforced Soil

Cited by 28 publications

References 11 publications

The Triaxial Test of Polypropylene Fiber Reinforced Fly Ash Soil

The Triaxial Test of Polypropylene Fiber Reinforced Fly Ash Soil

Cotton Wastes Functionalized Biomaterials from Micro to Nano: A Cleaner Approach for a Sustainable Environmental Application

Experimental study on the performance of the modified loess by polypropylene fiber mixed with bentonite and cement

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