Hydraulic performance of compacted clay liners under simulated daily thermal cycles

Aldaeef, Abdulghader A.; Rayhani, Mohammad T.

doi:10.1016/j.jenvman.2015.07.036

Cited by 31 publications

(12 citation statements)

References 15 publications

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“…The decrease in the MDD of the soils could be due to the generation or presence of micro-cracks within the soil fabric which could produce voids and fissures during compaction and finally reduced the MDD of the tested soils [14]. Similar behaviour was also obtained by Aldaeef [10] while working on hydraulic performance of compacted clay liners under the influence of both temperature and leachate exposures. The increase in OMC may also be linked to the production of microcracks.…”

Section: Effect Of Repeated Heat Treatment On Moisture Dry Density Resupporting

confidence: 66%

“…This is because soils may experience induced temperature changes from engineering structures such as groundwater heat pump [7], hot buried or oil and gas pipelines, buried electricity or high-voltage cables [8], and radioactive waste depositories [9]. In addition, the induced temperature change may also be as a result of daily and seasonal thermal cycles as observed in clay liner and embankments made of lateritic soils [10] or through natural wild forest fires and thermal remediation processes [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Effect of cyclic heating on some engineering characteristics of some soils from Ilorin, Nigeria

Owoyemi

Afolagboye

2020

SN Appl. Sci.

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Section: Effect Of Repeated Heat Treatment On Moisture Dry Density Resupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Effect of cyclic heating on some engineering characteristics of some soils from Ilorin, Nigeria

Owoyemi

Afolagboye

2020

SN Appl. Sci.

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“…Load at failure Cross sectional area at failure of change in clay size fraction, surface charge and specific surface area of fabrics, dehydration and decomposition of soil particles, changes in mineralogy and variation in macro-and microstructure of the soils [34,35]. Elevated temperature influences the LL of the soil such that it modifies the specific surface of the soil, its fabrics as well as interparticle contacts thereby giving rise to the reduction or disappearance of diffuse double layer [7].…”

Section: Temperature Effect On Atterberg Limitsmentioning

confidence: 99%

Experimental investigation on the effects of elevated temperature on geotechnical behaviour of tropical residual soils

Attah

Etim

2020

SN Appl. Sci.

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The engineering performance of soil after exposure to temperature is increasingly important in geotechnical and geoenvironmental engineering. Most thermal remediation of soil concentrates more on the remediation outcome and eliminates the effects temperature will have on the engineering properties of the soil itself. This paper presents the results of laboratory study conducted on two lateritic soils to investigate effect of elevated temperature difference on their geotechnical properties. The soils were classified as A-7-6 (8) and A-7-5 (4) based on the AASHTO soil classification system. After subjecting the soil samples to elevated temperatures (25, 50, 100, 150 and 200 °C), tests such as Atterberg limit, compaction, California bearing ratio (CBR), unconfined compressive strength (UCS) and scanning electron microscopy were carried on the samples. The results showed a decrease in Atterberg limit and increase in maximum dry density. The peak CBR for both the soils was obtained at 150 °C. The UCS increased with curing time but decreased with increased preheat temperature for both soils. The microanalysis result portrayed changes in morphological structure of fabrics which indicates a breakdown in the microstructural properties of the soil due to temperature variation. Generally, the statistical analysis of variance showed that temperature has significant effect on the geotechnical properties of residual soils.

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“…In many cases, especially in developing countries, compacted clay liners (CCLs) allowing a very low saturated hydraulic conductivity, far below 1 × 10 −9 m/s, and utilizing locally available earthen materials, equipment, workmanship, and technologies, were assumed to be useful for top and bottom sealing of landfills, as they are probably more durable, easier to maintain, and cheaper than the synthetic liners. The application of certified artificial liners in developing countries requires transfer of know-how, technical support, qualified staff, and monitoring systems to allow its long-term performance, also after the closure of the landfill [4,[13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Hydraulic and Swell–Shrink Characteristics of Clay and Recycled Zeolite Mixtures for Liner Construction in Sustainable Waste Landfill

2021

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This paper presents research considering hydraulic as well as swelling and shrinkage characteristics of potential recycled fine particle materials for compacted clay liner for sustainable landfills. Five locally available clay soils mixed with 10% (by mass) of NaP1 recycled zeolite were tested. The performed analysis was based on determined plasticity, cation exchange capacity, coefficient of saturated hydraulic conductivity after compaction, several shrinkage and swelling characteristics as well as, finally, saturated hydraulic conductivity after three cycles of drying and rewetting of tested specimens and the reference samples. The obtained results showed that addition of zeolite to clay soils allowed reduction in their saturated hydraulic conductivity to meet the required threshold (≤1 × 10−9 m/s) of sealing capabilities for compacted clay liner. On the other hand, an increase in plasticity, swelling, and in several cases in shrinkage, of the clay–zeolite mixture was observed. Finally, none of the tested mixtures was able to sustain its sealing capabilities after three cycles of drying and rewetting. Thus, the studied clayey soils mixed with sustainable recycled zeolite were assessed as promising materials for compacted liner construction. However, the liner should be operated carefully to avoid extensive dissication and cracking.

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Hydraulic performance of compacted clay liners under simulated daily thermal cycles

Cited by 31 publications

References 15 publications

Effect of cyclic heating on some engineering characteristics of some soils from Ilorin, Nigeria

Effect of cyclic heating on some engineering characteristics of some soils from Ilorin, Nigeria

Experimental investigation on the effects of elevated temperature on geotechnical behaviour of tropical residual soils

Hydraulic and Swell–Shrink Characteristics of Clay and Recycled Zeolite Mixtures for Liner Construction in Sustainable Waste Landfill

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