Mechanical properties of fiber and cement reinforced heavy metal-contaminated soils as roadbed filling

Huang, Yucheng; Chen, Ji; Tian, Angran; Wu, Hui-long; Zhang, Yuqing; Tang, Qiang

doi:10.1007/s11771-020-4426-7

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…Huang et al [18] found that the appropriate reinforcement of polypropylene fibers and cement is an effective way to recycle heavy metal contaminated soil (HMCS) as substitutable fillers in roadbed. Cheng et al [19] investigated the primary yielding and yield locus for cement stabilized marine clay. Wang et al [20] Investigated the durability and swelling of solidified/stabilized dredged marine soils with class-f fly ash, cement, and lime.…”

Section: Introductionmentioning

confidence: 99%

Investigation of ferronickel slag powder for marine applications by using MIP method

Shanmugasundar¹,

Krishnan²,

Babu

et al. 2022

Mater. Res. Express

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The main aim of this work is to study the performance of the ferro-nickel slag in the powder form and to analyze the permeability performance using MIP method. The test is carried out under two different conditions. It is performed in clean water and a marine environment. Under these conditions different admixture conditions were examined. The change in impermeability of soil and cements for various admixture conditions were examined and the values were measured. A Mercury Intrusion Porosimeter (MIP) was used to examine the pore structure. Permeability values shown increasing trend in both clean water and in a marine environment. The Impermeability values shown increasing trend in marine environment compared with the clean water. During experimentation when Ferronickel slag powder exceeds 20 percentage. The impermeability reduces gradually and it gets decreased.40 percentages of ferronickel slag powder obtained were seemed to be optimum. Based on the results obtained from Mercury Intrusion Porosimeter (MIP), synergetic integration of ferro nickel slag powder on mixing with the soil-cement creates a micro-aggregate effect and the porosity of soil-cement which in turn increased the resistance for sea water erosions. Keywords- Permeability Test, Ferro-Nickel Slag Powder, Impermeability, Clean Water, Marine Environment, Pore Structure.

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Section: Introductionmentioning

confidence: 99%

Investigation of ferronickel slag powder for marine applications by using MIP method

Shanmugasundar¹,

Krishnan²,

Babu

et al. 2022

Mater. Res. Express

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“…Microbial-induced calcite precipitation (MICP) is a bacteria-induced bio-mineralization process, which has been paid close attention to civil, infrastructure and environmental engineering [1][2][3]. Taking advantage of natural biological processes, it contributes to additional cementation at particle to particle contacts of soils, i.e., strength, stiffness or permeability improvement of soils [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of MICP on Physical and Mechanical Properties of Silt with Different Fine Particle Content and Pore Ratio

et al. 2021

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Microbial-induced calcium carbonate precipitation (MICP) is a new soil remediation technology, which can improve the physical and mechanical properties of soil by transporting bacterial solution and cementation solution to loose soil and precipitating calcium carbonate precipitation between soil particles through microbial mineralization. Based on this technique, the effects of different fine particle content and pore ratio on the physical and chemical properties of silt after reinforcement were studied. The content of calcium carbonate, the ability of silt to fixed bacteria, unconfined compressive strength (UCS), permeability coefficient and microstructure of the samples were determined. The results showed the following: In the process of calcium carbonate precipitation induced by microorganisms, more than 50% bacterial suspension remained on the surface of silt particles and their pores. The higher the bacterial fixation rate of silt, the more CaCO3 was generated during the solidification process. The bacterial fixation rate and CaCO3 content both decreased with the increase in the pore ratio and increased with the increase in the fine particle content. XRD and SEM images show that the calcium carbonate is mainly composed of spherical vaterite and acicular cluster aragonite. There is an obvious correlation between unconfined compressive strength and CaCO3 content of silt. When CaCO3 content accumulates to a certain extent, its strength will be significantly improved. The unconfined compressive strength of silt A with pore ratio of 0.75 and fine particle content of 75% is 2.22 MPa when the single injection amount of cementing fluid is 300 mL. The permeability coefficient of cured silt can be reduced by 1 to 4 orders of magnitude compared with that of untreated silt. In particular, the permeability of MICP-treated silt A is almost impermeable.

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“…3d) and f), the UCS and the deformation modulus of WCCS-Zn are more than that of WCCS-Cu. It is considered that when in a higher heavy metal content (5000 mg/kg), the solidification effect of cement on Zn 2+ is greater [35][36][37]. The failure strain of WCCS-Zn is the largest, followed by WCCS-Cu and WCCS-Pb.…”

Section: Effects Of Heavy Metal Content and Typementioning

confidence: 99%

The Potential of Wheat Straw Fibre in Treatment of Heavy Metal-Contaminated Soil: Mechanical Properties Research

Tian¹,

Chen²,

Feng³

et al. 2022

Pol. J. Environ. Stud.

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Soil contamination by heavy metals threatens human health, and the disposal of heavy metal-contaminated soil remains a serve problem worldwide. The heavy metals in soil degrade soil mechanical properties, while the utilization of contaminated soil is difficult. In previous studies, to decrease the impact of heavy metals, different types of cement and fibres were used to improve soil mechanical properties. This paper investigates the validity of combined use of wheat straw fibre and Portland cement in heavy metal-contaminated soil, and discusses the effect in mechanical properties. Wheat straw reinforced soil (WS), wheat straw and cement reinforced soil (WCS) and wheat straw and cement reinforced heavy metal-contaminated soil (WCCS), were tested via different heavy metal content and type, different fibre content and length, different cement content and curing age. The unconfined compressive strength (UCS), failure strain, deformation modulus, cohesion and internal friction angle were determined by series of unconfined compressive strength tests and direct shear tests.

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Mechanical properties of fiber and cement reinforced heavy metal-contaminated soils as roadbed filling

Cited by 6 publications

References 34 publications

Investigation of ferronickel slag powder for marine applications by using MIP method

Investigation of ferronickel slag powder for marine applications by using MIP method

The Effect of MICP on Physical and Mechanical Properties of Silt with Different Fine Particle Content and Pore Ratio

The Potential of Wheat Straw Fibre in Treatment of Heavy Metal-Contaminated Soil: Mechanical Properties Research

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