Study on swelling properties of an expansive soil deposit in Saskatchewan, Canada

Azam, Shahid; Shah, Imran; Raghunandan, Mavinakere Eshwaraiah; Ito, Maki

doi:10.1007/s10064-012-0457-0

Cited by 28 publications

(11 citation statements)

References 19 publications

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“…The clay has been used as a compacted liner for various applications: wastewater treatment plant [1], livestock manure storage [2], and municipal landfill [3]. The high specific surface area (50 m 2 /g) along with a high cation exchange capacity (40 cmol(+)/kg) of Regina clay [4] are useful in retaining several ionic species present in salt-rich water. A combination of physical and chemical processes are operative in active clay media such as ion exchange, filtration, settling, precipitation, volatilization, and adsorption [5].…”

Section: Introductionmentioning

confidence: 99%

Salts Removal from Synthetic Solution-Potash Brine by Non-Planted Constructed Wetlands

Chairawiwut

McMartin

Azam

2016

Water

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Four pilot-scale non-planted constructed wetlands (CWs) were employed to study the fate and transport of the two dominant chloride salts contained in brine resulting from solution mining activities in the potash industry. The simulated brine contained a 10:1 ratio of NaCl:KCl based on authentic brine characteristics. The multi-layer soils functioned as a main salt filtering component comprising of Regina Clay, sand and gravels. The CW systems were operated in three batches of 16 days (experiments 1-3). K + ions were removed by 92% (4.6 mg/L) from the effluent, while Clá nd Na + were removed in lower proportions of 51% (85.3 mg/L) and 45% (53.2 mg/L), respectively. Over time, the retained quantities of the three target salt ions decreased, indicating that clay sorption capacity may have been reached. This study demonstrated that Regina Clay has substantial sorbent capacity for salt ions contained in simulated potash brine solution.

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Section: Introductionmentioning

confidence: 99%

Salts Removal from Synthetic Solution-Potash Brine by Non-Planted Constructed Wetlands

Chairawiwut

McMartin

Azam

2016

Water

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“…Swelling of expansive soil often causes partial and full damages to various civil engineering structures, especially to lightly loaded structures such as houses, pavements, and canals. Swelling of soil causes many geotechnical problems for foundations, and pavement cracks beside canals, hydraulic structures, underground and/or rested on soil tanks [1]. Clay's ability to expansion due to increases in water content, which may be the result of ground water exert an upward pressure on foundation.…”

Section: Introductionmentioning

confidence: 99%

“…Expansion of clays and the associated swelling pressure results considerable damages, if the swelling pressure of the soil exceeds the foundation load, uplift causes walls, beams and columns to crack [2]. Many treatment procedures are available for expansive soils [1] and [3]. Excavation of expansive soils and replacement with non-expansive or treated soils used to reduce soil heave under a foundation or subgrade.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Expansive Soil in New Urban Areas Surrounding Cairo

2019

ERJ. Engineering Research Journal

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Swelling soils in Egypt are found in several areas such as new Cairo, Madinat-Nasr, Alshrouk city, Assuit, New vally, Aswan and Edfu … etc. This paper discusses the physico-chemical properties and engineering behavior of expansive clays founded in Egyptian desert surrounding Cairo city. Five expansive soil samples were collected at the foundation levels of five different sites in new-built cities surrounding Cairo. Laboratory tests were performed on these soil samples to investigate physical properties of the various samples. Also, soil particle structure and clay mineralogy were investigated using Scanning Electron Microscope and X-Ray Diffraction. The obtained results show that clay mineral, its percentage, chemical composition and consistency limits affecting the swelling behavior. Also, the effect of replacement layer thickness on swelling reduction ratio is studied. The results proved that the efficiency of replacement layers in reducing the swell of expansive soil. Then, Data fit software is used to correlate the experimental results

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“…Borehole drillings were made in July 2006 and May 2009 at Cross place, Regina, and the materials used for this numerical modelling had been investigated by Azam et al (2013). Figure 6(a) shows the grain size distribution curves for a sample obtained in May 2009.…”

Section: Materials Propertiesmentioning

confidence: 99%

A two stage model for moisture-induced deformations in expansive soils

Ito

Azam

Hu³

2014

Environ Syst Res

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Background: Moisture-induced suction changes in expansive soils due to infiltration and evaporation result in failure of civil infrastructure. The objective of this paper was to develop a two stage deformation model by simultaneously calculating soil suction and stress state. The model predictions were validated using a one-year field monitoring data. Results: Deformations in expansive soils closely match cyclical suction changes corresponding to seasonal weather variations. Volume changes fluctuated close to the ground surface and gradually decreased with depth (overburden pressure) due to isolation from meteorological effects. The top 2 m depth was found to be the active zone susceptible to moisture variations. Conclusions: The model agreed well with the monitoring data trends with deviations attributed to analytical assumptions in the equations, ineffective capture of antecedent soil conditions, possible soil heterogeneity and anisotropy, and hysteresis in soil saturation and desaturation.

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Study on swelling properties of an expansive soil deposit in Saskatchewan, Canada

Cited by 28 publications

References 19 publications

Salts Removal from Synthetic Solution-Potash Brine by Non-Planted Constructed Wetlands

Salts Removal from Synthetic Solution-Potash Brine by Non-Planted Constructed Wetlands

Experimental Study of Expansive Soil in New Urban Areas Surrounding Cairo

A two stage model for moisture-induced deformations in expansive soils

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