On the swelling potential of compacted high plasticity clays

Ferber, Valéry; Auriol, Jean-Claude; Cui, Yu Jun; Magnan, Jean-Pierre

doi:10.1016/j.enggeo.2008.10.008

Cited by 73 publications

(20 citation statements)

References 11 publications

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“…Clay soils are important in the construction of buildings, dams, roads, airports, pavements and highways [25][26][27][28][29][30][31][32][33][34]. Soil problems encountered in geotechnical engineering need to be solved.…”

Section: Previous Related Studiesmentioning

confidence: 99%

The Importance of Clay in Geotechnical Engineering

Ural¹

2018

Current Topics in the Utilization of Clay in Industrial and Medical Applications

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Clay is a very important material in geotechnical engineering, because it is often observed in geotechnical engineering practice. Generally, this soil type has numerous problems due to its low strength, high compressibility and high level of volumetric changes. Clay needs to be improved before it can be used in road construction, dams, slurry walls, airports and waste landfills. Improved gradation, a reduction in plasticity and swelling potential, as well as an increase in strength and workability, generally improve the stability of clay. Clay is a fine-grained soil, but not all fine-grained soils are clay. Clay minerals are very electrochemically active; thus, they affect soil microstructures. Due to these characteristics, many important soil problems related to clay have been observed in the past, the importance of which is understood. In this chapter, the properties of clay, as well as the use of clay in geotechnical engineering and geotechnical studies on clay, are examined.

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Section: Previous Related Studiesmentioning

confidence: 99%

The Importance of Clay in Geotechnical Engineering

Ural¹

2018

Current Topics in the Utilization of Clay in Industrial and Medical Applications

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“…Cohesive soils compacted by means of higher energy are characterised by a larger volume increase in the presence of water. Conventional swelling tests performed on four clays (Ferber et al, 2009) confirmed the influence of initial moisture content and dry density on the swelling potential. Mercury intrusion porosimetry measurements suggested that the influence of the moisture content and the dry density was related to the microstructure changes and showed that swelling leads to an increase in micropores and a decrease in macropores.…”

Section: Geotechnical Researchmentioning

confidence: 99%

One-dimensional compression and swelling of compacted fly ash

Zabielska-Adamska

2018

Geotechnical Research

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The aim of the paper is to prove that the compressibility and swelling of compacted fly ash in both unsaturated and fully saturated conditions are dependent on the moisture content at the compaction and on the compaction energy, as in the case of cohesive soils. The studies have been conducted on samples compacted at various water contents in conventional oedometers and the Rowe hydraulic consolidation cell and in California bearing ratio moulds (swelling tests). The one-dimensional compressibility of saturated fly ash is much higher than that of unsaturated fly ash. Deformation of unsaturated samples increases with moisture at compaction, and the samples compacted with greater effort are less compressible. The consolidation of the saturated samples decreases with their moisture content at compaction and at the reduction of the compaction energy. The swelling of ash samples decreases as the moisture during compaction increases and when compaction energy is lower. The highest swelling was obtained for the fly ash with the highest optimum water content.

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“…These clayey materials undergo volumetric changes upon wetting and drying, and eventually cause ground heave and settlement problems. Volume change of these types of clayey materials is a major cause of natural disasters, since it causes extensive damage to structures and infrastructure (Sabtan 2005;Abu Seif 2006, 2007Chen et al 2007;Huang and Wu 2007;Assadi and Shahaboddin 2009;Avsar et al 2009;Ferber et al 2009). This problematic phenomenon is owing mainly to small particle size, large specific surface area, swelling clay minerals, and high cation exchange capacity (CEC) (Fityus and Buzzi 2009;Nalbantoglu 2004;Nalbantoglu and Gucbilmez 2001).…”

Section: Introductionmentioning

confidence: 98%

Efficiency of quicklime in reducing the swelling potential of pulverized expansive shale, Northern Jeddah, Saudi Arabia

Seif

2014

Bull Eng Geol Environ

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Expansive shale has been found extensively all over the world, especially in tropical and sub-tropical regions. The ground heave that results from shale swelling potential is a multi-factorial phenomenon. Remarkably, the expansive shale of Saudi Arabia varies considerably due to variations in its ancient environmental climatic conditions. The studied shale of Bathan Formation at Al-Rehaili northeastern Jeddah is considered a problematic expansive material and classified as clayey shale of high plasticity (CH). Clay mineral species of these lacustrine sediments are composed mainly of smectite, kaolinite, and smectiteillite mixed layered. Exchangeable sodium percentage values of the Bathan Formation, northern Jeddah are very low. Addition of quicklime (up to 3 %) decreases consistency limits. The destructive effect of quicklime addition (up to 3 %) on the swelling potentiality of these clayey-rich sediments is due to the formation of highly swell ettringite. Mechanical properties, such as unconfined compression strength, have been improved due to the cementation effect of lime as well as the creation of new crystalline compounds such as calcium silicates and ettringite. Adding quicklime percent should not exceed 3 % to prevent increasing pH value and to avoid formation of ettringite which has higher ability to swell.

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On the swelling potential of compacted high plasticity clays

Cited by 73 publications

References 11 publications

The Importance of Clay in Geotechnical Engineering

The Importance of Clay in Geotechnical Engineering

One-dimensional compression and swelling of compacted fly ash

Efficiency of quicklime in reducing the swelling potential of pulverized expansive shale, Northern Jeddah, Saudi Arabia

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