On the compressibility and shear strength of natural clays

Burland, J. B.

doi:10.1680/geot.1990.40.3.329

Cited by 1,438 publications

(1,152 citation statements)

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“…In his fortieth Rankine lecture, Burland (1990) by an italic and subscript v. Hence, e v indicates the void ratio associated with the vertical 140 effective stress. For two parameters introduced in this study, differences exist between the 141 parameters used in the two systems: the parameters * 100 e (the void ratio of the soil in a 142 reconstituted state at p = 100 kPa) and * 1000 e (the void ratio at p = 1,000 kPa …”

Section: Burland's Work On the Compression Behaviour Of Reconstitutedmentioning

confidence: 99%

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Estimation of the compression behaviour of reconstituted clays

Liu

Zhuang

Horpibulsuk

2013

Engineering Geology

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The void index is a relative quantity measuring the position of the current void ratio of a clay against the void ratios of the clay at two specific vertical effective stresses (i.e., σ v ′ = 100 kPa and σ v ′ =1000 kPa). Based on this concept, a simple systematic tool is proposed for estimating the compression behaviour of reconstituted clays over a wide range of stresses and water contents. Following the practice of geotechnical engineering computation, the compression behaviour of clays is idealised as linear segments in the Iv ~ lnp′ (or the void index and the mean effective stress) space. Considering the variation in the available data, there are three related but independent models for describing the compression behaviour of reconstituted clays. The accuracy of estimation increases with the level of available data. The proposed estimation is used to simulate the behaviour of a variety of reconstituted clays over a wide range of stresses and water contents. With different levels of available data, the estimation is evaluated on the basis of these simulations. The proposed estimation can take maximumuse of available data and provide a simple yet practical tool for calculating the compression behaviour of reconstituted clays and a basic parameter for geotechnical engineering computations, the compression index. An empirical equation for the initial compression index is also suggested and verified. ABSTRACT 61The void index is a relative quantity measuring the position of the current void ratio of a clay 62 against the void ratios of the clay at two specific vertical effective stresses, i.e.,  v = 100 kPa 63 and  v = 1000 kPa.). Based on this concept, a simple systematic tool is proposed for 64 estimating the compression behaviour of reconstituted clays over a wide range of stresses and 65 water contents. Following the practice of geotechnical engineering computation, the 66 compression behaviour of clays is idealised as linear segments in the I v ~ lnp (or the void 67 index and the mean effective stress) space. Considering the variation in the available data, 68 there are three related but independent models for describing the compression behaviour of 69 reconstituted clays. The accuracy of estimation increases with the level of available data. The 70 proposed estimation is used to simulate the behaviour of a variety of reconstituted clays over 71 a wide range of stresses and water contents. With different levels of available data, the 72 estimation is evaluated on the basis of these simulations. The proposed estimation can take 73 maximum use of available data and provide a simple yet practical tool for calculating the 74 compression behaviour of reconstituted clays and a basic parameter for geotechnical 75 engineering computations, the compression index. An empirical equation for the initial 76 compression index is also suggested and verified. 77

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Section: Burland's Work On the Compression Behaviour Of Reconstitutedmentioning

confidence: 99%

“…properties (e.g., Skempton, 1944;Bowles, 1989;Muir Wood, 1990; Burland, 1990;Sridharan 443 and Nagaraji, 2000; Horpibulsuk et al, 2013). Based on these studies, the virgin compression 444 index of a clay can usually be estimated from the liquid limit or the initial void ratio of the 445 soil.…”

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confidence: 99%

Estimation of the compression behaviour of reconstituted clays

Liu

Zhuang

Horpibulsuk

2013

Engineering Geology

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“…Burland [6] stated that much modern soil mechanics has developed from the results of careful, comprehensive studies of the properties of remolded or reconstituted natural soils or artificial materials such as kaolinite or illite. Kaolin used in the present work, is made of clayey minerals dominated by the kaolinite, derived essentially from the alteration of Felds path alkaline and micas with a density of 2.62.…”

Section: Methodsmentioning

confidence: 99%

“…Kaolin used in the present work, is made of clayey minerals dominated by the kaolinite, derived essentially from the alteration of Felds path alkaline and micas with a density of 2.62. Previous research has shown that the kaolin structure possesses great advantages in many processes due to its high chemical stability and low expansion coefficient [7,8]. The importance of kaolin is remarkable as one of the most abundant mineral in soils and sediments, its properties are such that it interacts with other soil elements and contribute to the mechanical stability of the soils [9,10].…”

Section: Methodsmentioning

confidence: 99%

Compressibility of a Fat Clay mixed with aggregates

Bouteraa¹,

Rouili²

2016

J Civil Environ Eng

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Abstract'Fat' clayey soils, containing large proportion of fines (more than 50%) and mixture of aggregates are usually encountered as natural deposits in a high plasticity state. These soils may be used as row material after chemical or mechanical stabilization, in many earthworks applications. The clay content, the amount and size of aggregates, are known to affect the compressibility potential, and thus, the stiffness of the soil when subjected to vertical loads. In this investigation, a comprehensive oedometer testing program was conducted on reconstituted artificial samples, made of various mass proportions of kaolin, sand and gravel. The moisture content of the samples varied accordingly to the percentage of kaolin content in each series, but yielding samples of high plasticity, having the same Atterberg limits. The compressibility was characterized herein by the coefficient of volume compressibility (m v ). The results indicate that, for this type of soils, the compressibility is much more affected by the coarser matrix (ratio of the mass percentage of the gravel to the mass percentage of sand G/S) rather than the percentage of clay content. Based on the observations made, a chart is proposed for a quick estimation of the compressibility potential of fat clays.

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“…The permeability values (K) for the Rupel Clay Member underneath the Westerschelde were extrapolated to greater depths and yielded values ranging Netherlands Journal of Geosciences / Geologie en Mijnbouw 82 (1) Vertical pressure [MPa] Void ratio (e) (Burland, 1990); SCL = Sedimentary Compression Line, which approaches compression of clay under natural geological conditions; solid arrow = pre-consolidation stress, open arrow = effective in-situ stress including a load of a 1000-metre-thick ice cover. from 1.2 x 10 -11 m/s to 5.4 x 10 -15 m/s.…”

Section: Oedometer Testsmentioning

confidence: 99%

Radionuclide transport in clay during climate change

Wildenborg

Orlić

Thimus

et al. 2003

Netherlands Journal of Geosciences

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The Dutch national research programme into the feasibility of retrievable storage of radioactive waste (CORA Programme Phase I; CORA: Comité Opslag Radioactief Afval = Committee on Radioactive Waste Disposal) examined the suitability of Tertiary clay deposits for such storage. Long-term isolation – up to 1 million years – of high-level radioactive waste under varying conditions is essential. A key concern is the hydro-mechanical response of the clay deposits in which radioactive waste might possibly be stored, in particular during glacial climate conditions as has happened repeatedly in the Netherlands during the Pleistocene. To evaluate this possibility hydro-mechanical computer simulations and mechanical laboratory experiments have been performed to analyse the effects of glacial loading by a thousand-metre-thick ice sheet on the permeability characteristics, fluid flow rates and the associated migration of radio-nuclides both within and out of Tertiary clays.Glacial loading causes the expulsion of pore water from deeply buried clay deposits into adjoining aquifers. The rates and duration of the consolidation-driven outflow of water from the clay deposit, are very sensitive to the permeability of the clay and the dynamics of the advancing ice sheet. The maximum outflow rate of pore water is 1 mm per year. This rate is approximately three times faster than the flow rate of water in clay prior to ice loading. These preliminary simulation studies also indicate that cyclic loading can result in more rapid migration of radio-nuclides in clays. In clay deposits that are covered by a thick ice sheet, the contribution of dispersed transport relative to the total transport by diffusion amounts to 14%, assuming that there is no absorption of radio-nuclides by the clays and a longitudinal dispersivity of 50 m.

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On the compressibility and shear strength of natural clays

Cited by 1,438 publications

References 20 publications

Estimation of the compression behaviour of reconstituted clays

Estimation of the compression behaviour of reconstituted clays

Compressibility of a Fat Clay mixed with aggregates

Radionuclide transport in clay during climate change

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