Direct Shear Strength of Clay Reinforced with Coir Fiber

Widianti, Anita; Diana, Willis; Hasana, Maratul

doi:10.30737/ukarst.v4i2.1020

Cited by 9 publications

(7 citation statements)

References 9 publications

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“…They presented improvements in mechanical properties such as UCS values, shear-strength parameters, and flexibility. Previous research found that coir fibre improves the stiffness, strength [48], and bearing capacity of clay soil [49].…”

Section: Unconfined Compression-strength Testmentioning

confidence: 99%

Compressive and Shear Strengths of Coir Fibre Reinforced Activated Carbon Stabilised Lateritic Soil

et al. 2022

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Constructing structures on lateritic soil is challenging in geotechnical engineering due to the various physical and geotechnical characteristics. Many studies investigated different stabiliser materials to strengthen the geotechnical parameters of lateritic soil. This study used activated carbon and coir fibre (ACF) to stabilise lateritic soils as an environmentally friendly binder. Experiments including the unconfined compressive strength (UCS) test and the direct shear test (DST) are performed to investigate the mechanical properties of ACF-stabilised soil for different percentages of activated carbon (AC). Before and after ACF stabilisation, microstructural characterisations of soil samples were performed using field emission scanning electron microscopy (FESEM) and surface-area analysis (BET). The experimental results demonstrate that 3% ACF can considerably enhance the compressive strength, while 2% ACF significantly improves the shear strength, of lateritic soil. Accordant to the UCS results, using fibre in AC-stabilised soil improves post-peak behaviour and residual strength. Moreover, 2% ACF can significantly improve shear strength by creating an interlocking matrix among AC, soil particles, and fibre. The microstructural characterisation based on the findings obtained by FESEM and BET analysis confirms that AC particles fill soil voids. AC restrains the soil movement when exposed to external stresses. In addition, the formation of gel in the stabilised soil matrix binds the soil particles, increasing the strength of the ACF-stabilised soil in comparison with untreated soil.

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Section: Unconfined Compression-strength Testmentioning

confidence: 99%

Compressive and Shear Strengths of Coir Fibre Reinforced Activated Carbon Stabilised Lateritic Soil

et al. 2022

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“…Se conformaron tres muestras de suelo fino de consistencia blanda, y fibra de cáñamo de 4 cm de longitud, con dos diferentes proporciones de cáñamo según el peso seco requerido para cada ensayo, asignando las muestras como Arcilla Patrón, A p , Arcilla con 0.5 % de cáñamo, A0.5 %, y Arcilla con 0.75 % de Cáñamo, A 0.75 % (Abou Diab et al, 2018;Mazhoud et al, 2017;Widianti y Diana, 2020). El material que se seleccionó para reunir las tres mezclas de suelo, se obtuvo del resultado de la excavación realizada en la operación de pilotaje del edificio de posgrados de la Universidad Pedagógica y Tecnológica de Colombia [UPTC] ubicado en la zona urbana nororiental de la ciudad de Tunja.…”

Section: Materialesunclassified

Efecto de la aplicación de cáñamo en las propiedades de resistencia y resistividad de una arcilla

Cárdenas¹,

Moreno²,

Vega³

2022

rev. Logos cienc. tecnol.

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La investigación tiene el objetivo de hallar el efecto y proporción adecuada de la fibra de cáñamo de 4 cm de longitud, en las propiedades de resistencia y resistividad de una arcilla. Las propiedades investigadas incluyen la humedad óptima (wópt); el peso unitario seco máximo (γdmáx), cohesión (c); ángulo de fricción (Φ), resistencia a la compresión inconfinada (qu), y resistividad eléctrica (ρ). Los ensayos de compactación Proctor modificado (ASTM D 1557-12), corte directo consolidado no drenado (CU) para suelos cohesivos (ASTM 6528-17), resistencia a la compresión inconfinada (ASTM D2166-16) y del ensayo de los cuatro electrodos de Wenner (ASTM G57-01l), se aplicaron en tres muestras de arcilla con diferentes proporciones de fibra de cáñamo; muestra patrón, Ap, de 100 % arcilla de la ciudad de Tunja, Colombia, muestra con 0.5 % y 0.75 % de fibra de cáñamo, A0.5 %, y A0.75 %, con relación al peso seco del material. Los resultados del presente estudios indican que el porcentaje óptimo de cáñamo es 0.5 %, evidenciando disminución en las propiedades de compactación, y aumento de las propiedades de resistencia al corte, resistencia a la compresión inconfinada, y de resistividad eléctrica, sin embrago, ante mayor presencia de fibra, se presenta destrucción de la matriz arcillosa.

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“…1). Widianti et al [25] have tested the soil's engineering properties in previous studies, as shown in Table 1. Table 1 shows that the clay which was used is high plasticity clay.…”

Section: Soilmentioning

confidence: 99%

“…Several studies conducted UCS tests from soil mixed with coir fiber and other materials, including lime [16], using a mixture of bentonite, lime, gypsum [17], rice husk ash [6], [18], [19], fly ash [20], lime and coir fiber ash [16], carbon tetrachloride & sodium hydroxide [21], polypropylene fiber [22], basalt fiber [23], organic polymers and sisal fiber [24]. Widianti et al [25] have studied direct shear strength on clay strengthened with coconut fiber. The maximum shear strength is generated at fiber content of 0.75%.…”

Section: Introductionmentioning

confidence: 99%

Unconfined Compressive Strength of Clay Strengthened by Coconut Fiber Waste

Widianti¹,

Diana²,

Fikriyah³

2021

Advances in Engineering Research

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Indonesia is a country that produces the largest coconut in the world. 35% of the coconut volume is coir. Coir is a waste that has not been widely used for construction work. The coir fibers have the highest tensile strength among other natural fibers and have resistance to compressive forces. In this study, the unconfined compressive strength (UCS) of clay strengthened with coconut fiber is presented. The specimens were made with the fiber percentage of 0.00%; 0.25%; 0.50%; 0.75%; and 1.00% by weight of the mixture. This study concluded that the clay's UCS has increased along with the more coconut fiber added. The maximum value of UCS and secant modulus was obtained in clay with fibers of 0.75%. The clay strengthened with coconut fiber becomes stiffer than the initial clay, thereby improving its soil stability.

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Direct Shear Strength of Clay Reinforced with Coir Fiber

Cited by 9 publications

References 9 publications

Compressive and Shear Strengths of Coir Fibre Reinforced Activated Carbon Stabilised Lateritic Soil

Compressive and Shear Strengths of Coir Fibre Reinforced Activated Carbon Stabilised Lateritic Soil

Efecto de la aplicación de cáñamo en las propiedades de resistencia y resistividad de una arcilla

Unconfined Compressive Strength of Clay Strengthened by Coconut Fiber Waste

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