Vane shear strength of bio-improved sand reinforced with natural fibre

Qureshi, Mohsin Usman; Al-Hilly, Abdulsalam; Al-Zeidi, Ola; Al-Barrami, Ashwaq; Al-Jabri, Ahed

doi:10.1051/e3sconf/20199212004

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…Date palm fibers along with xanthan gum were used to enhance dune sand. Results showed that fiber increased the vane shear strength of the treated sand at a low concentration of xanthan, while high xanthan contents (2%) experienced almost the same strength with and without adding fiber [175]. The addition of sheep wool along with sodium alginate showed significant growth in the compressive strength performance of cohesive soil from 2.23 MPa for natural soil to 4.44 MPa for reinforced biotreated soil.…”

Section: Effect Of Adding Fibermentioning

confidence: 95%

“…For sand treated by xanthan gum, it has been reported that the MDD and OMC behaviors were symmetrical such that 1% biopolymer caused the highest MDD and lowest OMC to be reached, then by increasing the biopolymer content, MDD reduced and OMC started to increase. The initial growth in MDD was due to the lubrication effect of biopolymer until 1%, while for higher content, xanthan showed a negative effect so that a swelling behavior of the treated soil was observed [151,175]. The xanthan-treated clay showed different behavior in comparison to the biomodified sand.…”

Section: Compaction Testmentioning

confidence: 98%

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Biopolymers as Green Binders for Soil Improvement in Geotechnical Applications: A Review

et al. 2021

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Soil improvement using biopolymers has attracted considerable attention in recent years, with the aim to reduce the harmful environmental effects of traditional materials, such as cement. This paper aims to provide a review on the environmental assessment of using biopolymers as binders in soil improvement, biopolymer-treated soil characteristics, as well as the most important factors affecting the behavior of the treated soil. In more detail, environmental benefits and concerns about the use of biopolymers in soil improvement as well as biopolymer–soil interaction are discussed. Various geotechnical properties are evaluated and compared, including the unconfined compressive strength, shear strength, erosion resistance, physical properties, and durability of biopolymer-treated soils. The influential factors and soil and environmental conditions affecting various geotechnical characteristics of biopolymer-treated soils are also discussed. These factors include biopolymer concentration in the biopolymer–soil mixture, moisture condition, temperature, and dehydration time. Potential opportunities for biopolymers in geotechnical engineering and the challenges are also presented.

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Section: Effect Of Adding Fibermentioning

confidence: 95%

Section: Compaction Testmentioning

confidence: 98%

Biopolymers as Green Binders for Soil Improvement in Geotechnical Applications: A Review

et al. 2021

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“…The purpose of the current study is to develop a suitable methodology to apply the EICP technique to improve dune sand in Oman. Other ongoing eco-friendly practices include using biopolymers such as xanthan gum [17][18][19][20] to improve the strength and durability of dune sand. For the current study, the literature review revealed that the microbial technique is slower and needs a longer duration if we compare microbial and chemical cementation.…”

Section: Introductionmentioning

confidence: 99%

Enzyme Induced Calcite Precipitation (EICP) for Engineering Application by Using Plant Based Biomaterials

Alshibli

Alsaidi

Akhtar³

et al. 2022

MSF

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This research investigated the effect of reactant concentrations, reaction medium, urease enzyme source, and calcium source on the precipitation rate of calcium carbonate (CaCO3). This project is aiming to develop a biochemical reaction by using Enzyme Induced Calcite Precipitation (EICP) technique. This new technique would help in replacing the traditional cementation for the dune sand stabilization and promise an environmentally friendly and sustainable approach in the field of construction materials. Jack beans and soybeans were employed as a substrate to catalyze the urea hydrolysis in the study. The sources of calcium used in the experiments were calcium chloride (CaCl2), eggshell and sesame. In addition, both seawater and distilled water were used as a reaction medium to distinguish the effect on calcium carbonate precipitation. The experiments showed that using sesame at a concentration of 4.5 g, 5 g of urea and 6 g of jack bean at 60 mL of distilled water, is the best reaction conditions to precipitate 100.288 g of calcium carbonate. Further, the results indicated that the calcium carbonate precipitation enhanced by using 5 g of urea, 5 g of CaCl2 and 5 g of soybean at 50 mL of seawater. The precipitation amount was 25.593 g. These results provide a useful way for the bio cementation by following the EICP technique to address the issues of environment friendly practice of ground improvement.

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“…The unconfined compressive strength increases with sediment contentment up to 75% and then decreases with the increase in sediment content. Also, to further develop the dune sand properties there were different added substances have been utilized; such as the use of marble waste [9], biopolymer and fibres [10], sediments [8], cement and dust [11], and fly ash [12].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Fine Soil as Potential Source for Core of Rock-Fill Dam

Alsaidi

Alshezawi

2022

KEM

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This study investigates the use of wadi sediments as a potential source for the core of rock-fill dams. The current practice utilizes clay and silty materials for the core of the rock-fill dam. In Oman, clay is not abundantly available, so there is a need to propose a local alternative material as a potential source for the core of the rock-fill dam. Dredged sediment is believed to have properties like clay but is a waste material deposited in reservoirs. The samples of wadi sediments were grouped from the reservoir of Wadi Jizzi Dam, located a few kilometers away from the city of Sohar. A detailed laboratory-testing program investigates the physical characteristics, grain size distribution, liquid and plastic limits, specific gravity, compaction, hydraulic conductivity (permeability), swelling potential, and unconfined compressive strength. All the tests were performed following the British Standard. The pure dredged sediment has a hydraulic conductivity of 7.11x10-6 cm/s, which is comparable to the requirements of the core of the dam. To improve the other properties of the dredged sediment, it is mixed in different proportions with dune sand collected from the Al-Sharqia Desert of Oman. The test results suggest that a mixture ratio of 50% of sediment to the dune sand gives optimal strength, durability, and permeability. On the other hand, for the comparison purposes, bentonite was mixed with sand by various percentage. The microscopic investigation and X-ray diffraction (XRD) analysis tests on dredged sediments suggest that the material can be utilized without causing any environmental concerns. The outcomes of this study is expected to assist the practitioners in achieving cost-effectiveness and sustainability in the design.

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Vane shear strength of bio-improved sand reinforced with natural fibre

Cited by 8 publications

References 21 publications

Biopolymers as Green Binders for Soil Improvement in Geotechnical Applications: A Review

Biopolymers as Green Binders for Soil Improvement in Geotechnical Applications: A Review

Enzyme Induced Calcite Precipitation (EICP) for Engineering Application by Using Plant Based Biomaterials

Utilization of Fine Soil as Potential Source for Core of Rock-Fill Dam

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