Shear strength and microstructure characteristics of soil reinforced with lignocellulosic fibers-Sustainable materials for construction

Moslemi, Alireza; Tabarsa, Alireza; Mousavi, S. Yasin; Monfared, M H Aryaie

doi:10.1016/j.conbuildmat.2022.129246

Cited by 21 publications

(5 citation statements)

References 34 publications

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“…If friction is dominant, then the important parameters in the use of this fiber will be the diameter and length of the fiber, so as to ensure the size of the surface of the fiber interacting with the soil. SEM results show that the increased strength of the fiber-stabilized soil is caused by a physical process [42].…”

Section: Unconfined Compressive Strength Of Stabilized Claymentioning

confidence: 93%

“…This friction, together with the restrain effect, even increases the durability of the fiber-reinforced soil against freeze-thaw cycling [26]. In addition, the curing time also reduces the pore water pressure, thereby increasing the strength of the fiber-reinforced soil [42]. The increase in strength is directly proportional to the number of fibers used.…”

Section: Unconfined Compressive Strength Of Stabilized Claymentioning

confidence: 99%

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Tensile Strength and Durability of Oil Palm Empty Fruit Bunch Fiber in Soft Soil

Arifin¹

2022

GEOMATE

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Natural fibers are already being used to stabilize the soil. However, the exact mechanism by which natural fibers improve the shear strength of soil is still not clear, and it varies according to the morphology of each fiber. Its durability in the soil is also an important issue in the use of natural fibers for soil stabilization. This study focused on the strength and durability of oil palm empty fruit bunch (OPEFB) fiber as a stabilizing material for soft clay. The durability was determined according to the changes in tensile strength and friction of the soil after a certain period. The clay was obtained from Banyu Hirang in South Kalimantan. The OPEFB fiber was obtained without further treatment from a palm oil processing plant. Tensile, soil-fiber friction, and unconfined compression tests were conducted for mixtures of fiber and soil. Preparations were made for each test with the same duration and conditions (1, 7, 14, 28, and 90 days) in closed and open conditions. The results showed that the average tensile strength of the fiber before use was 101 MPa. This value decreased sharply after 14 days in the soil, leaving a strength of 35.71 MPa in the open condition and 23.89% in the closed condition on the 90th day. The soil-fiber friction increased with increasing time, reaching 0.15 MPa in both conditions from the initial value of 0.06 MPa. The compressive strength of the soil-fiber mixture also increased with time. The corresponding scanning electron microscope results strengthened the findings of this study.

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Section: Unconfined Compressive Strength Of Stabilized Claymentioning

confidence: 93%

Section: Unconfined Compressive Strength Of Stabilized Claymentioning

confidence: 99%

Tensile Strength and Durability of Oil Palm Empty Fruit Bunch Fiber in Soft Soil

Arifin¹

2022

GEOMATE

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“…Therefore, as the axial deformation increases, the frictional and/or adhesion forces at the ber-soil interface and the tensile strength of the bers are mobilized. In this way, the deformation of the soil particles near the bers is limited, and the reinforced soil acts as an integrated structure [44,45]. When PP ber-reinforced soil is subjected to an axial load, the soil matrix bears the load at strain levels less than 1-3%.…”

Section: Stress-strain Behavior Analysismentioning

confidence: 99%

Experimental Investigation of the Mechanical Properties of Polypropylene Fiber-Reinforced Clay Soil and Development of Predictive Models: Effects of Fiber Length and Fiber Content

Yazici,

Keskin

2023

Preprint

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This study investigated the mechanical properties of a low plasticity clay soil reinforced with polypropylene (PP) fiber in various contents (0.05%, 0.10%, 0.15%, 0.20%) and lengths (6, 12, 19 mm). The reinforced specimens were subjected to unconsolidated-undrained (UU) triaxial compression tests under three different confining pressures (50, 100, and 200 kPa). The optimum fiber contents in specimens reinforced with 6, 12, and 19 mm PP fiber were determined as 0.15%, 0.15%, and 0.20%, respectively. As a result, the highest values regarding deviator stress at failure (σdev), energy absorption capacity (EAC), and shear strength parameters occurred in specimens containing 0.20% PP (19 mm). As a result of the reinforcement process, the most remarkable improvements in the σdev, cohesion, internal friction angle, and EAC values of the natural soil are 59.95%, 21.80%, 63%, and 34.70%, respectively. Linear and non-linear relationships between σdev and fiber length, fiber content, and confining pressure were investigated by multiple linear regression (MLR) and artificial neural network (ANN) methods. Equations were generated to predict σdev of a low plasticity clay soil reinforced with PP fiber and were made available to geotechnical researchers.

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“…Coir, jute, palm, and kenaf, as examples Improved soil strength, cost-effectiveness, high availability, eco-friendliness, and healing ability for wetting-drying cycles [73][74][75][76][77].…”

Section: Natural Fibersmentioning

confidence: 99%

Key Success Factors for the Practical Application of New Geomaterials

Alelvan,

Santos,

Pierozan

et al. 2023

Sustainability

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Geomaterials comprise naturally formed materials through geological processes, such as soils and rocks, or artificially processed materials, including mineral waste and geosynthetics. These materials find extensive use in geotechnical structures, such as slopes, dams, and pavements, among others. However, two issues commonly arise in earthworks: the materials available in the region do not meet the minimum engineering requirements, resulting in high transportation costs, and the exploitation of new deposits increases environmental impacts. Consequently, there is a need to develop stabilization and reinforcement techniques aimed at creating new geomaterials (NGs) to expand the range of local material applications. In this context, the present study evaluates the key success factors (KSFs) related to the application of NGs in geotechnical structures. The Delphi method was employed through a structured questionnaire developed after an extensive literature review. Brazilian experts from the public, private, and academic sectors were selected to identify the obstacles and potential pathways for the practical application of NGs. The outcomes of the study indicated that the lack of standardization, the complex behavior of geomaterials under varying conditions, as well as technical and economic limitations serve as barriers impeding the widespread adoption of NGs. Finally, a roadmap proposal was devised, encompassing a series of actions intended to facilitate the broader utilization of NGs.

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Shear strength and microstructure characteristics of soil reinforced with lignocellulosic fibers-Sustainable materials for construction

Cited by 21 publications

References 34 publications

Tensile Strength and Durability of Oil Palm Empty Fruit Bunch Fiber in Soft Soil

Tensile Strength and Durability of Oil Palm Empty Fruit Bunch Fiber in Soft Soil

Experimental Investigation of the Mechanical Properties of Polypropylene Fiber-Reinforced Clay Soil and Development of Predictive Models: Effects of Fiber Length and Fiber Content

Key Success Factors for the Practical Application of New Geomaterials

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