Interfacial shear strength of fiber reinforced soil

Tang, Chao‐Sheng; Shi, Bin; Zhao, Lizheng

doi:10.1016/j.geotexmem.2009.10.001

Cited by 324 publications

(121 citation statements)

References 42 publications

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“…Figure 5 shows some typical curves of the shear stress versus shear strain for the test specimens, where the shear stress has a general tendency to increase with the shear strain increasing. It is similar to the researches by Hasan et al [15] and Tang et al [26]. In addition, it should be noted that the shear strength of the mixture is equal to the shear stress at the shear strain of 10% [15].…”

Section: E Ects Of Vertical Pressure and C Stc On Shearsupporting

confidence: 90%

Mechanical Properties of Scrap Tire Crumbs‐Clayey Soil Mixtures Determined by Laboratory Tests

2018

Advances in Materials Science and Engineering

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Some laboratory tests, such as Proctor compaction test, direct shear and cyclic direct shear tests, consolidation test, and unconfined compression test, were performed on scrap tire crumbs-clayey soil mixtures to study the mechanical properties of the mixtures. e results show that (1) the maximum dry unit weight and the corresponding optimum moisture content of the mixtures decrease rapidly with the increase of scrap tire crumbs content (C STC ), showing good potential for using the mixtures as lightweight fill material; (2) it is not possible to prepare the mixture when C STC exceeds 30% due to the occurrence of cracks in the mixture after removing from a mould; and (3) the shear strength of mixtures approximately increases by 20% when C STC is up to 30%, while the residual strength decreases by 15%, compared with that of pure clayey soil. During shearing, the dilation of the mixtures occurs, particularly under the condition of a high C STC and a low vertical pressure. Besides, the compressive strength and consolidation settlement of the mixtures decrease with C STC increasing. e results indicate that it is possible for scrap tire crumbs used to improve clayey soil, which is suitable to act as a fill material.

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Section: E Ects Of Vertical Pressure and C Stc On Shearsupporting

confidence: 90%

Mechanical Properties of Scrap Tire Crumbs‐Clayey Soil Mixtures Determined by Laboratory Tests

2018

Advances in Materials Science and Engineering

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“…Accordingly, finer sand is of much higher fiber bond strength, and therefore, is less likely to fail through the slipping mechanism, compared with coarse sand [29]. Moreover, Tang et al [21] conducted a number of single fiber pull-out tests and reported that interfacial peak strength and interfacial residual strength increase with an increase in dry density of soil, but decrease with an increase in water content [7]. In this research, the sand was fine grained (with a mean grain size of 0.19 mm), and specimens were prepared at a high relative density (70%) under dry conditions.…”

Section: Effect Of Fiber On Strength Parametersmentioning

confidence: 99%

“…Diambra et al [14] reported that most common techniques of preparing reinforced specimens, like moist tamping, lead to sub-horizontal orientation of fibers. Tang et al [21] conducted single fiber pull out tests to study the interfacial shear strength of polypropylene fiber reinforced soil. They suggested that interfacial mechanical interaction between reinforcement and soil particles is a key factor in controlling the engineering properties of reinforced soil.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Mechanical Properties ofFiber-Reinforced Sand under Triaxial Compressionand Direct Shear

Noorzad

Zarinkolaei

2015

Open Geosciences

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This research investigates the behavior of sand reinforced with polypropylene fiber. To do this, 40 direct shear tests and 40 triaxial tests were performed on the coastal beaches of Babolsar, a city in the North of Iran. The effect of parameters such as fiber content, length of fiber and normal or confining pressure on the behavior of Babolsar sand have been studied. In this study, four various fiber contents (0, 0.25, 0.5 and 1 percent), three different lengths of fiber (6, 12 and 18 mm) and four normal or confining pressures (50, 100, 200 and 400 kPa) have been employed. The test results show that fiber inclusion has a significant effect on the behavior of sand. In both direct shear and triaxial tests, the addition of fibers improved shear strength parameters (C, φ), increased peak shear strength and axial strain at failure, and also limited the amount of post-peak reduction in shear resistance. The comparison of the test results revealed that due to better fiber orientation toward the direction of principal tensile strain in triaxial test as compared to direct shear tests, the fiber efficiency and its effect on soil behavior is much more significant in triaxial specimens.

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“…A further four indirect factors affect these parameters: water content, size effect, soil dry density and cement inclusions. To identify the physics at the micro-scale, Tang et al (2010) and Li (2005) performed micro-mechanical tests using apparatus to assess single-fibre pull-out. While such tests may be criticised with regard to the non-uniform distribution of stress along the fibre due to a slight arching of the fibres (Michalowski and Cermák, 2003), they provide an important insight into the controlling interface mechanics.…”

Section: 1mentioning

confidence: 99%

Mixing and compaction of fibre- and lime-modified cohesive soil

Gelder

Fowmes

2016

Proceedings of the Institution of Civil Engineers - Ground Impr

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Citation: GELDER, C. and FOWMES, G.J., 2015. Mixing and compaction of fibre-and lime-modified cohesive soil.Proceedings of the ICE -Ground Improvement, 169 (2), pp. 98-108.Additional Information:• Fibre reinforcement is a versatile method of increasing the shear strength of soils for earthwork applications. However, research to date has encountered a number of problems when utilising cohesive host soils. The aim of this study was to develop a suitable site-applicable method of mixing fibre into cohesive host soils. Intermediate plasticity clay reinforced with monofilament polypropylene fibres was used in the laboratory investigations. In order to mix the fibres successfully, the initial moisture content of the host soil was increased prior to the introduction of fibres. By introducing quicklime, excess moisture was removed through the hydration process, and a portion of free water was effectively held within aggregations of flocculated clay particles, thereby having little influence on the dynamic boundaries. Fibrous inclusions within the clay clods resisted compactive effort, forming an interlocked structure. As a result, the optimum moisture content increased and the maximum dry density decreased. This trend was heavily dependent on the interfacial shear resistance along the fibre boundary, which consequently decreased as the water content increased or the compactive effort was increased. Results from strength tests confirmed that both peak and post-peak shear strength increased, creating a more ductile material capable of maintaining shear strength at high levels of strain.

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Interfacial shear strength of fiber reinforced soil

Cited by 324 publications

References 42 publications

Mechanical Properties of Scrap Tire Crumbs‐Clayey Soil Mixtures Determined by Laboratory Tests

Mechanical Properties of Scrap Tire Crumbs‐Clayey Soil Mixtures Determined by Laboratory Tests

Comparison of Mechanical Properties ofFiber-Reinforced Sand under Triaxial Compressionand Direct Shear

Mixing and compaction of fibre- and lime-modified cohesive soil

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