Predicting the Behaviour of Fibre Reinforced Cement Treated Clay

Nguyen, Lam; Fatahi, Behzad; Khabbaz, Hadi

doi:10.1016/j.proeng.2016.06.020

Cited by 13 publications

(6 citation statements)

References 14 publications

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“…Later, several studies reported the influence of PET fiber inclusion on the mechanical properties of soils [17][18][19][20][21]. The behavior of soils reinforced with PP fibers has also been extensively studied [12,[22][23][24][25][26][27][28]. However, there is a lack of studies involving the inclusion of polymeric strips taken from recyclable materials as soil reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Reinforcing Effect of Polypropylene Waste Strips on Compacted Lateritic Soils

et al. 2020

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This study evaluated the strength properties of compacted lateritic soils reinforced with polypropylene (PP) waste strips cut from recycled plastic packing with the goal of promoting sustainability through using local materials for engineering work and reusing waste materials as low-cost reinforcements. Waste PP strips with widths of 15 mm and different lengths were uniformly mixed with clayey sand (SC) and clay (CL) soils with the goal of using these materials as low-cost fiber reinforcements. The impact of different PP strip contents (0.25% to 2.0%) and lengths (10, 15, 20, and 30 mm) on the unconfined compressive strength (UCS) of the soils revealed an optimum combination of PP strip content and length. Statistical analysis showed that PP strip content has a greater effect than the PP strip length on the UCS for both soils. Results led to the definition of an empirical equation to estimate the UCS of strip-reinforced soils. The results from direct shear tests indicate that the SC soil showed an increase in both apparent cohesion and friction angle after reinforcement, while the CL soil only showed an increase in friction angle after reinforcement. California bearing ratio (CBR) tests indicate that the SC soil experienced a 70% increase in CBR after reinforcement, while the CBR of the CL soil was not affected by strip inclusion.

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Section: Introductionmentioning

confidence: 99%

Reinforcing Effect of Polypropylene Waste Strips on Compacted Lateritic Soils

et al. 2020

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“…The mechanism of action of dispersed reinforcement in soil has been described by Gray and Ohashi, among others [42,43]. To predict the effect of applied reinforcement, many researchers attempt to create a model and derive an equation that could predict changes in properties, such as compressive strength, tensile strength, strain, stiffness, modulus values, and other parameters [12,25,40,44,45]. A relationship between mixture porosity and unconfined compressive strength was also observed.…”

Section: Introductionmentioning

confidence: 99%

Influence of Dispersed Reinforcement on Mechanical Properties of Stabilized Soil

2021

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Stabilized soils are commonly used as part of pavement construction in highway engineering. The everyday use of this material makes it necessary to classify it. One of the basic methods of determining the mechanical properties of a material is the Unconfined Compressive Strength (UCS) test, from which the material elasticity can be determined. The scope of the research included the design and making of soil mixtures stabilized with polypropylene fibers modified cement. This paper presents the effect of the amount of dispersed reinforcement on the maximum compressive strength, the secant modulus at half the ultimate stress (), the secant modulus at the ultimate stress (), and the tangent modulus (). The materials chapter characterizes the soil, cement, and dispersed reinforcement used. The test methods section describes the tests performed and the procedure for interpreting the results. The results section describes the relationship between elastic modulus and compressive strength. The discussion section compares the obtained results with the works of other authors. The work is concluded with a summary containing the most important conclusions resulting from the work.

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“…Robin et al [17] used the Modified Cam Clay model to observe the modification of mechanical parameters due to lime treatment. Nguyen et al [18] also used the Modified Cam Clay model to predict the failure behavior of fiber-reinforced cement-treated clay. 3D finite element analysis was achieved to simulate the rutting behavior of the soil stabilized with foamed sulphur asphalt [19].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Time-Dependent Strength and Stiffness in Palm Oil Fuel Ash-Stabilized Soil: Early and Long-Term Effects

Al-Dalain,

Ezreig,

Ismail

2024

Civ Eng J

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Over the years, investigating the behavior of soft soil, stabilized using different techniques, has been recognized as a critical priority for geotechnical engineers. Numerous soil constitutive models have been utilized to simulate stabilized soil behavior, improve strength and ductility, and analyze load-deformation responses. However, further investigation is required to study stabilized soil's time-dependent strength and stiffness, especially at an early curing age. Early strength and stiffness development is crucial in engineering construction for improving building quality and efficiency and minimizing crack risk. Furthermore, estimating UCS from an early age aid in safety evaluation and ground-improvement analysis. Researchers are increasingly recognizing palm oil fuel ash (POFA) as an eco-friendly alternative to traditional soil stabilizers due to its abundant availability. This study proposes an advanced concrete constitutive model to simulate the time-dependent strength and stiffness of POFA-stabilized and cement-stabilized soil due to pozzolanic interactions. The model accurately measures strength and stiffness improvement from an early curing age to 28 days using finite element analysis (FEA) before then comparing the experimental results. Based on the experimental results, the UCS values of palm oil fuel ash-stabilized soil grew to 3.18 MPa and 3.89 MPa after seven and 28 days with an optimum content of 30% (POFA): 10% Magnesium Oxide (MgO). It exhibited a significant increase in early strength with 64.02% compared with cement-stabilized soil. For stiffness results, a slight increment of 9.26% was observed. Employing FEM, the sensitivity of the parameters to stress-strain behavior was investigated. Finally, the validity of the concrete constitutive model to predict the time-dependent strength and stiffness of stabilized soil was proved. Doi: 10.28991/CEJ-SP2024-010-05 Full Text: PDF

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Predicting the Behaviour of Fibre Reinforced Cement Treated Clay

Cited by 13 publications

References 14 publications

Reinforcing Effect of Polypropylene Waste Strips on Compacted Lateritic Soils

Reinforcing Effect of Polypropylene Waste Strips on Compacted Lateritic Soils

Influence of Dispersed Reinforcement on Mechanical Properties of Stabilized Soil

Numerical Analysis of Time-Dependent Strength and Stiffness in Palm Oil Fuel Ash-Stabilized Soil: Early and Long-Term Effects

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