Compressibility and permeability of Bangkok clay compared with kaolinite and bentonite

Horpibulsuk, Suksun; Yangsukkaseam, Narongded; Chinkulkijniwat, Avirut; Du, Yan-Jun

doi:10.1016/j.clay.2011.02.014

Cited by 141 publications

(64 citation statements)

References 21 publications

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“…In the bentonite treatment, the clay content was increased by 2% compared with the control treatment ( Table 1). Compared with other clay minerals, bentonite has a high liquid limit and high expansibility as a result of water absorbance [53]. We considered that the slight addition of bentonite clay probably absorbed more water, and as a result the water content in the soil increased.…”

Section: Discussionmentioning

confidence: 99%

Effects of Bentonite, Charcoal and Corncob for Soil Improvement and Growth Characteristics of Teak Seedling Planted on Acrisols in Northeast Thailand

Kayama

Nimpila

Hongthong

et al. 2016

Forests

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Abstract:When teak (Tectona grandis L. f.) is planted on acrisols in Northeast Thailand, its growth is suppressed by low pH, infertility, and low water holding capacity. To examine materials capable of increasing water holding capacity in soil and improving teak growth, we conducted an experiment with teak seedlings. We selected bentonite, charcoal, and corncob and added these materials at a rate of 4% to sandy soil from northeast Thailand. Teak seedlings were potted on these soils and raised from July 2013 to July 2014. We compared growth, photosynthetic rates, leaf water potential, and concentrations of elements in plant organs among bentonite, charcoal, corncob, and no addition (control) treatments. Water content in the soils was increased for the bentonite and charcoal treatments. Teak seedlings potted in these two conditions did not suffer from drought stress. Comparing the growth traits of the teak seedlings, the charcoal treatment produced larger root growth and promoted the uptake of phosphorus and potassium, whereas the bentonite treatment did not show positive effects on growth or nutrient acquisition. In contrast, the corncob treatment decreased water content in the soil, and teak seedling growth was suppressed. We concluded that charcoal was a useful material to improve teak growth in sandy soils.

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Section: Discussionmentioning

confidence: 99%

Effects of Bentonite, Charcoal and Corncob for Soil Improvement and Growth Characteristics of Teak Seedling Planted on Acrisols in Northeast Thailand

Kayama

Nimpila

Hongthong

et al. 2016

Forests

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“…It has been reported that w L increases marginally with increasing concentration of ions in the pore water. Increasing the concentration and the valence of the ions in the pore fluid causes coagulation of the minerals, which leads to a higher liquid limit (Horpibulsuk et al 2011;Sridharan and Venkatappa Rao 1975;Sridharan et al 1986Sridharan et al , 1988.…”

Section: Kaolinite Mineralsmentioning

confidence: 99%

“…basalt and volcanic ash in arid environments where both pH and concentration of the electrolytes are high (Mitchell and Soga 2005;Popescu 1986). Leaching effects may change the concentration of cations in the pore water of a deposited smectiterich clay, which may alter the adsorbed cations (Horpibulsuk et al 2011), and hence the properties of the clay after sedimentation.…”

Section: Diffuse Double Layers Of Clay Particlesmentioning

confidence: 99%

“…NaCl in saline waters causes the thickness of the diffuse double layer to shrink, limiting the volume change behaviour (Thøgersen 2001;Sridharan and Venkatappa Rao 1973). Thus, the w L decreases with an increase of salinity for smectite-rich clays (Horpibulsuk et al 2011;Sridharan and Venkatappa Rao 1975;Sridharan et al 1986Sridharan et al , 1988. The liquid limit, plastic limit, undrained shear strength and deformation potential, etc.…”

Section: Diffuse Double Layers Of Clay Particlesmentioning

confidence: 99%

“…These samples were initially prepared as slurries with water content above w L and preconsolidated to σ v = 163 kPa in a floating-ring acrylic consolidometer, to achieve a sufficient firmness for the sample to be handled in the laboratory during trimming. Previously, a significant amount of work has been carried out on reconstituted specimens (Krizek and Sheeran 1970;Burland 1990;Horpibulsuk et al 2007;Horpibulsuk et al 2011). …”

Section: Preparation Of Slurry Samplesmentioning

confidence: 99%

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Influence of smectite content on the deformation behaviour of clay

Lodahl¹

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A number of structures are planned to be constructed on or in the Palaeogene clays in Denmark, e.g. the re-development of Aarhus Ø and the construction of the Femern Fixed Link. The Palaeogene clays are generally of very high plasticity, hold low strengths and have high deformation potentials despite being previously compressed by past glaciations. When unloaded the clay adsorbs water and swells profoundly. These geotechnical traits pose a challenge and must be accounted for when designing a structure situated on high plasticity clays. When not considered, the features of the Palaeogene clay may pose a safety concern for the building and settlements may develop over time.Previous studies on Palaeogene clays in Denmark have shown, that the well-known index relations used in Danish geotechnical practice are generally not valid for the in situ behaviour of high plasticity clays. Moreover, several studies illustrates how the vertical yield stress derived from the compression curves of high plasticity clays does not reflect the previously sustained overburden, which normally is the case for clays of low to medium plasticity. The feature have been described as "lack of stress memory".The present thesis investigates the 1D deformation behaviour of high plasticity clays. The effects of the clay mineral smectite on the deformation and swelling potential of the high plasticity clays are of special focus. Based on 1D compression tests the deformation potential of a range of artificial specimens made from mixtures of kaolinite and smectite minerals were investigated. Features typically observed for Danish Palaeogene clays were also observed for the artificial mixtures, e.g. high plasticity and low stiffness, which have both been related to the smectite content in the tested, artificial specimens.Based on a number of tests, conducted following different loading programmes, a deformation model framework is presented which captures the essential features of the high plasticity clays. The model reproduces the compression curves obtained from testing of artificial specimens quite well and have also successfully been applied to reproduce compression curves from oedometer tests on intact natural highly plastic clays presented in literature. Based on the conducted tests it was observed that the lack of stress memory was related to the void ratio increase on a former unloading step, and thus directly affected by the smectite content of the specimen and the extent of unloading. It was also found that the compression potential in normally and overconsolidated conditions is dictated by smectite content but also affected by the length of the stress path followed during testing. III ResuméFlere bygge-og anlaegsprojekter er planlagt opført på de danske palaeogene lere, f.eks. udviklingen af Aarhus Ø og etableringen af den faste forbindelse over Femern Baelt. De palaeogene lere har generelt meget høj plasticitet, lave styrker og høje deformationspotentialer, selvom de tidligere er blevet belastet af isen under forgangne istider. Nå...

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Evaluation of the hydraulic conductivity of aquifers with piles

Sun

2013

Hydrogeol J

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Compressibility and permeability of Bangkok clay compared with kaolinite and bentonite

Cited by 141 publications

References 21 publications

Effects of Bentonite, Charcoal and Corncob for Soil Improvement and Growth Characteristics of Teak Seedling Planted on Acrisols in Northeast Thailand

Effects of Bentonite, Charcoal and Corncob for Soil Improvement and Growth Characteristics of Teak Seedling Planted on Acrisols in Northeast Thailand

Influence of smectite content on the deformation behaviour of clay

Evaluation of the hydraulic conductivity of aquifers with piles

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