The influence of amendments on the volumetric shrinkage and integrity of compacted clay soils used in landfill liners

Omidi, G. H.; Prasad, T. V.; Thomas, James C.; Brown, K. W.

doi:10.1007/bf00279161

Cited by 47 publications

(14 citation statements)

References 3 publications

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“…In all cases, nano-Similar studies have found that the highest reduction of the volumetric shrinkage and expansive strain was observed for CNFs which were long, generally straight and had diameters of approximately 200 nm (Blandine et al 2016). It is noticed that for bentonite modified soil specimens (S2 & S3), the volumetric shrinkage strain was reduced by more than 11%, making them suitable to be used as liners (Omidi et al 1996a(Omidi et al , 1996b. Figure 21 shows the schematic diagram (interpreted from Figures 13 and 22) of the mechanical behavior during the interface between NCs and soil particles.…”

Section: Effect Of Ncs On Shrinkage and Expansive Strainsmentioning

confidence: 60%

Effects of Nano-Carbon Reinforcement on the Swelling and Shrinkage Behaviour of Soil

Taha¹,

Alsharef²,

Al-Mansob³

et al. 2018

JSM

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In this study, the performance of two types of nanocarbons (NCs), namely carbon nanotubes (CNTs) Keywords: Compaction; desiccation cracks; nano-fiber reinforcement; volume change ABSTRAK Dalam kajian ini, prestasi dua jenis nanokarbon (NC), iaitu tiub nano karbon (CNT) dan serat nano karbon (CNF) terhadap sifat pengecutan tiga dimensi dan sifat pembengkakan tiga jenis lempung dikaji. Spesimen tanah dicampur

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Section: Effect Of Ncs On Shrinkage and Expansive Strainsmentioning

confidence: 60%

Effects of Nano-Carbon Reinforcement on the Swelling and Shrinkage Behaviour of Soil

Taha¹,

Alsharef²,

Al-Mansob³

et al. 2018

JSM

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“…Additionally, hydraulic conductivity increases with about three orders of magnitude due to desiccation cracking [2]. A few have considered soil additives (lime, sand, and cement) to increase the soil strength and resistance to cracking [3][4][5][6]. However, based on the previous studies, the lime or cement additives did not sufficiently suppress desiccation cracking and the low permeability of clayey soils with high water contents.…”

Section: Introductionmentioning

confidence: 99%

Potential of Using Nanocarbons to Stabilize Weak Soils

Alsharef

Taha

Firoozi

et al. 2016

Applied and Environmental Soil Science

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Soil stabilization, using a variety of stabilizers, is a common method used by engineers and designers to enhance the properties of soil. The use of nanomaterials for soil stabilization is one of the most active research areas that also encompass a number of disciplines, including civil engineering and construction materials. Soils improved by nanomaterials could provide a novel, smart, and eco-and environment-friendly construction material for sustainability. In this case, carbon nanomaterials (CNMs) have become candidates for numerous applications in civil engineering. The main objective of this paper is to explore improvements in the physical properties of UKM residual soil using small amounts (0.05, 0.075, 0.1, and 0.2%) of nanocarbons, that is, carbon nanotube (multiwall carbon nanotube (MWCNTs)) and carbon nanofibers (CNFs). The parameters investigated in this study include Atterberg's limits, optimum water content, maximum dry density, specific gravity, pH, and hydraulic conductivity. Nanocarbons increased the pH values from 3.93 to 4.16. Furthermore, the hydraulic conductivity values of the stabilized fine-grained soil samples containing MWCNTs decreased from 2.16 − 09 m/s to 9.46 − 10 m/s and, in the reinforcement sample by CNFs, the hydraulic conductivity value decreased to 7.44 − 10 m/s. Small amount of nanocarbons (MWCNTs and CNFs) decreased the optimum moisture content, increased maximum dry density, reduced the plasticity index, and also had a significant effect on its hydraulic conductivity.

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“…Chemical agents such as cement and lime have been used to reduce the shrinkage potential and suppress the crack development in soils [12,13]. However, lime or cement additives did not completely suppress the soil desiccation cracking when the initial water content was high, and more importantly, might harm plant growth and cause irreversible environmental concerns [14]. The addition of fiber reinforcement has been adopted by a number of researchers in the past few decades (e.g., [15,16]).…”

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confidence: 99%

Desiccation Cracking Behavior of MICP-Treated Bentonite

et al. 2019

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This study aims to characterize the effect of microbial-induced calcite precipitation (MICP) on the desiccation cracking behaviors of compacted calcium bentonite soils. We prepare six groups of samples by mixing bentonites with deionized water, pure bacteria solution, pure cementation solution, and mixed bacteria and cementation solutions at three different percentages. We use an image processing tool to characterize the soil desiccation cracking patterns. Experimental results reveal the influences of fluid type and mixture percentage on the crack evolution and volumetric deformation of bentonite soils. MICP reactions effectively delay the crack initiation and remediate desiccation cracking, as reflected by the decreased geometrical descriptors of the crack pattern such as surface crack ratio. The mixture containing 50% bacteria and 50% cementation solutions maximizes the MICP treatment and works most effectively in lowering the soil cracking potential. This study provides new insights into the desiccation cracking of expansive clayey soils and shows the potential of MICP applications in the crack remediation.

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The influence of amendments on the volumetric shrinkage and integrity of compacted clay soils used in landfill liners

Cited by 47 publications

References 3 publications

Effects of Nano-Carbon Reinforcement on the Swelling and Shrinkage Behaviour of Soil

Effects of Nano-Carbon Reinforcement on the Swelling and Shrinkage Behaviour of Soil

Potential of Using Nanocarbons to Stabilize Weak Soils

Desiccation Cracking Behavior of MICP-Treated Bentonite

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