Treatment of an expansive soil using vegetable (DISS) fibre

Gheris, Abderrahim; Hamrouni, Adam

doi:10.1007/s41062-020-0281-5

Cited by 14 publications

(7 citation statements)

References 22 publications

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“…Thus, for the optimum water content, initially at 1% fiber, a decrease is observed, and then it increases according to the percentage of fiber added (Figure 10). Authors in [20,21] noticed the same result, which is most likely due to the higher water absorption capacity of fibers (fiber hydrophilicity) compared to soil. In addition, the decrease in the dry density noticed is explained by the low specific weight of the fibers compared to the grains of the soil, as the fibers prevent the particles of soil from approaching each other.…”

Section: Effect Of Diss Fibers On Compaction Propertiesmentioning

confidence: 57%

“…Previously, Diss fibers were used to cover the roofs of houses and in particular as reinforcements in mixtures during the manufacture of the walls of old earthen dwellings because of their good mechanical, hydrous, and hygrothermal qualities [17][18][19]. Recently, this material has been involved in the development of soil reinforcement materials in geotechnics [20]. The use of natural fibers, either to manufacture eco-geotextiles or mixed with the soil to form a composite material, has recently met with some success in the field of construction (stability of soils and embankments, control of erosion, infiltration, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Use of Eco-Friendly Materials in the Stabilization of Expansive Soils

et al. 2022

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Volume change of expansive soils is a challenging issue, which affects various engineering structures all over the world. Consequently, we need environmentally-friendly and cost-effective soil stabilizers to address the challenges related to expansive soils. The utilization of natural fibers allows for the reduction in environmental impact since they are renewable and biodegradable raw materials. Moreover, the current article presents an experimental approach to study the effect of natural fibers on the mechanical behavior of expansive soils. Various experimental tests—such as Atterberg limits, standard compaction, direct shear, swelling potential, and swelling pressure—were conducted on control and treated soil samples using different percentages of fibers. The results of measurements of the physico-mechanical properties after reinforcement of the soil with 1%, 5%, and 10% of natural fibers indicate that the mechanical behavior of expansive soils is greatly influenced by the addition of natural fibers. To conclude, 86% reduction was observed in the swelling coefficient of treated soil. Future research can be done to check the durability of the current practice in detail.

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Section: Effect Of Diss Fibers On Compaction Propertiesmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Use of Eco-Friendly Materials in the Stabilization of Expansive Soils

et al. 2022

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“…Interaction between ground (soils, rockfill) and plane strain piles is described using erface elements. e material of the interface element could be modeled by a new material, which has the same strength properties of the rounding soil (or rockfill) multiplied by a factor, called strength reducing factor for interface � �� , as expressed in uations (23) and (24). In the most cases, � �� equals 2/3.…”

Section: Materials Model For Structural Elementsmentioning

confidence: 99%

“…Recently, a large volume of research works used seismic fragility curves as a useful tool to evaluate the seismic performance of pile-supported wharves. [23][24][25][26][27][28][29][30] Several port structures use batter piles to provide lateral resistance and to limit deflections from lateral loads, such as ship berthing and seismic loads. In the past, engineers contest the use of batter piles due to the poor performance under earthquake, caused by the lack of proper design of the batter piles head connections.…”

Section: Introductionmentioning

confidence: 99%

The influence of the soil constitutive models on the seismic analysis of pile-supported wharf structures with batter piles in cut-slope rock dike

Deghoul

Gabi

Hamrouni

2020

Studia Geotechnica Et Mechanica

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AbstractIn coastal regions, earthquakes caused severe damage to marine structures. Many researchers have conducted numerical investigations in order to understand the dynamic behavior of these structures. The most frequently used model in numerical calculations of soil is the linear-elastic perfectly plastic model with a Mohr-Coulomb failure criterion (MC model). It is recommended to use this model to represent a first-order approximation of soil behavior. Therefore, it is necessary to accommodate soil constitutive models for the specific geotechnical problems.In this paper, three soil constitutive models with different accuracy were applied by using the two-dimensional finite element software PLAXIS to study the behavior of pile-supported wharf embedded in rock dike, under the 1989 Loma Prieta earthquake. These models are: a linear-elastic perfectly plastic model (MC model), an elastoplastic model with isotropic hardening (HS model), and the Hardening Soil model with an extension to the small-strain stiffness (HSS model).A typical pile-supported wharf structure with batter piles from the western United States ports was selected to perform the study. The wharf included cut-slope (sliver) rock dike configuration, which is constituted by a thin layer of rockfill overlaid by a slope of loose sand. The foundation soil and the backfill soil behind the wharf were all dense sand. The soil parameters used in the study were calibrated in numerical soil element tests (Oedometer and Triaxial tests).The wharf displacement and pore pressure results obtained using models with different accuracy were compared to the numerical results of Heidary-Torkamani et al.[28] It was found that the Hardening Soil model with small-strain stiffness (HSS model) gives clearly better results than the MC and HS models.Afterwards, the pile displacements in sloping rockfill were analyzed. The displacement time histories of the rock dike at the top and at the toe were also exposed. It can be noted that during the earthquake there was a significant lateral ground displacement at the upper part of the embankment due to the liquefaction of loose sand. This movement caused displacement at the dike top greater than its displacement at the toe. Consequently, the behavior of the wharf was affected and the pile displacements were important, specially the piles closest to the dike top.

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“…and (2) chemical stabilization (by adding materials such as fly ash, salts, cement, lime, etc.). Recently, the addition of synthetic fibers [5][6][7][8][9][10][11][12][13] and natural fibers [13][14][15][16][17][18][19] has been considered among effective soil improvement techniques. Many studies have shown that the use of fibers (of natural or synthetic origin) gives satisfying results regarding the expansive behavior of soils [1-4, 8, 9, 12-14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polypropylene Fibers on Swelling Potential and Shear Strength of Clay

2023

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Expansive clays can cause major problems for urban development (roads, railways, infrastructure, etc.); therefore, reducing the swelling potential of clays has always been a concern in the geotechnical field. The presented paper investigates the effect of polypropylene reinforcement fibers on the swelling potential and shear strength of clay. The samples studied were taken from the clayey region of Mila, located in the northern east of Algeria. The experimental procedure adopted in this research consists first of the assessment of the physical, mechanical, and mineralogical characteristics of the soil samples without reinforcement. Then, swelling pressure, swelling rate, and swelling index are used to assess the swelling potential of these samples. After the reinforcement using a variety of polypropylene fiber concentrations (2 to 6% of the weight of the dry clay), the free swelling is clearly reduced. The optimum reinforcement rate in this case is 4%, in which the swelling was reduced by 90.7%. Finally, to offer more insights regarding the impact of clay reinforcement using polypropylene fibers, the effect of this later on the mechanical properties of the studied clay was also analyzed through the tangential shear strength. It was found that the polypropylene fibers increased the tangential shear resistance of Mila’s clay. Doi: 10.28991/CEJ-2023-09-03-04 Full Text: PDF

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Treatment of an expansive soil using vegetable (DISS) fibre

Cited by 14 publications

References 22 publications

Use of Eco-Friendly Materials in the Stabilization of Expansive Soils

Use of Eco-Friendly Materials in the Stabilization of Expansive Soils

The influence of the soil constitutive models on the seismic analysis of pile-supported wharf structures with batter piles in cut-slope rock dike

Effect of Polypropylene Fibers on Swelling Potential and Shear Strength of Clay

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