Effect of desiccation cracking on the hydraulic conductivity of a compacted clay liner

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

doi:10.1007/bf00300424

Cited by 94 publications

(54 citation statements)

References 14 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: 64%

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: 64%

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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“…Albrecht and Benson (2001) reported considerable volumetric shrinkage as the clay content increased in soils where smectite clays dominated, while illite, kaolinite, and quartz soils demonstrated less shrinkage. Similarly, Omidi et al (1996) reported higher volumetric shrinkage in smectite soils compared to illite soils. This was linked to the capability of smectite clays to absorb more interlayer water and consequently undergo higher volumetric shrinkage upon drying.…”

Section: Introductionmentioning

confidence: 93%

“…If the volumetric shrinkage is restricted, cracks may occur when the soil's tensile strength fails to resist the growing tensile stresses (Nahlawi and Kodikara, 2006;Tang et al, 2011). Volume shrinkage and cracking were shown to significantly affect the hydraulic performance of CCLs (e.g., Omidi et al, 1996;Rayhani et al, 2007Rayhani et al, , 2008. Omidi et al (1996) suggested that soils with volumetric shrinkage of less than 11% would result in quite stable hydraulic performance under desiccation.…”

Section: Introductionmentioning

confidence: 97%

“…Volume shrinkage and cracking were shown to significantly affect the hydraulic performance of CCLs (e.g., Omidi et al, 1996;Rayhani et al, 2007Rayhani et al, , 2008. Omidi et al (1996) suggested that soils with volumetric shrinkage of less than 11% would result in quite stable hydraulic performance under desiccation. However, clayey soils with volumetric shrinkage higher than 11% would experience an increase in their permeability.…”

Section: Introductionmentioning

confidence: 98%

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Hydraulic performance of compacted clay liners under simulated daily thermal cycles

Aldaeef

Rayhani

2015

Journal of Environmental Management

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“…Generally, clayey soils with high plasticity need more W-D cycles to reach the equilibrium state than silty or sandy soils (Al-Wahab and El-Kedrah, 1995;Omidi et al, 1996;Yesiller et al, 2000).…”

Section: Equilibrium State During Multiple W-d Cyclesmentioning

confidence: 98%

Desiccation and cracking behaviour of clay layer from slurry state under wetting–drying cycles

Tang¹,

Cui²,

Shi³

et al. 2011

Geoderma

288

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a b s t r a c tLaboratory tests were conducted to investigate the effect of wetting-drying (W-D) cycles on the initiation and evolution of cracks in clay layer. Four identical slurry specimens were prepared and subjected to five subsequent W-D cycles. The water evaporation, surface cracks evolution and structure evolution during the W-D cycles were monitored. The effect of W-D cycles on the geometric characteristics of crack patterns was analyzed by image processing. The results show that the desiccation and cracking behaviour was significantly affected by the applied W-D cycles: the measured cracking water content θ c , surface crack ratio R sc and final thickness h f of the specimen increased significantly in the first three W-D cycles and then tended to reach equilibrium; the formed crack patterns after the second W-D cycle were more irregular than that after the first W-D cycle; the increase of surface cracks was accompanied by the decrease of pore volume shrinkage during drying. In addition, it was found that the applied W-D cycles resulted in significant rearrangement of specimen structure: the initially homogeneous and non-aggregated structure was converted to a clear aggregated-structure with obvious inter-aggregate pores after the second W-D cycle; the specimen volume generally increased with increasing cycles due to the aggregation and increased porosity. The image analysis results show that the geometric characteristics of crack pattern were significantly influenced by the W-D cycles, but this influence was reduced after the third cycle. This is consistent with the observations over the experiment, and indicates that the image processing can be used for quantitatively analyzing the W-D cycle dependence of clay desiccation cracking behaviour.

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Effect of desiccation cracking on the hydraulic conductivity of a compacted clay liner

Cited by 94 publications

References 14 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

Hydraulic performance of compacted clay liners under simulated daily thermal cycles

Desiccation and cracking behaviour of clay layer from slurry state under wetting–drying cycles

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