Clay, engineering geology

Gillott, J. E.

doi:10.1007/0-387-30842-3_9

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…Clays have varying chemical properties that are dependent on the chemical and physical conditions and occurrences of the environment where the clay is deposited [7]. These properties determine the clay's quality, engineering behavior, and commercial value due to origin, composition, and physical chemistry [8,9]. Clay minerals have found applications in the oil industry.…”

Section: Figurementioning

confidence: 99%

Characterization of <i>Amuda-Isuochi</i> Nigerian Clay Deposit for Potential Industrial Applications

Uwaezuoke

Okoro

Igwilo

et al. 2022

JERA

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The aim of the work was to characterize the clay from Amuda-Isuochi, Abia state Nigeria. Preliminary research works on the area is scanty. The characterization involved chemical and elemental analyses, X-ray diffraction, specific surface area analysis, thermal analyses (TGA, DTA) and particle size distribution. The results showed that the clay is kaolin. Specific surface area of 251m2/g was observed, with average particle size of 84.67d.nm and polydispersity index of 0.203. The sample will find applications in oil and gas industry as lost circulation control material and for manufacture of proppants for hydraulic fracturing activities. Similarly, it can be used as an adsorbent and has potential applications for ceramic tile, paper, paints, fibre glass and starting material for alum. The kaolin clay will also be suitable as a nano-material. The output indicates an addition to local contents for Nigeria’s industrial development.

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Section: Figurementioning

confidence: 99%

Characterization of <i>Amuda-Isuochi</i> Nigerian Clay Deposit for Potential Industrial Applications

Uwaezuoke

Okoro

Igwilo

et al. 2022

JERA

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“…In the study of clays the structure is used as a complex term due to their character and degree of diagenesis. In engineering geology the definition of the structure of clays comprises three elements: (i) grain size and mineral composition; (ii) fabric, referring to the composition, shape and size of the structural elements of the skeleton and the character of the pore space (porosity, pore size and shape, pore distribution); and (iii) forces between the structural elements of the soil skeleton (Mitchell 1976;Gillott 1987).…”

Section: Introductionmentioning

confidence: 99%

Acta Geologica Polonica

Wójcik,

Trzciński,

Łądkiewicz-Krochmal

2019

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This paper presents the qualitative and quantitative characteristics of microstructures of Neogene clays from Warsaw, Poland. Scanning Electron Microscope (SEM) studies were used for the microstructural analysis of natural clays and clay pastes. Qualitative microstructural changes were observed: from a honeycomb microstructure for the initial clay paste to a turbulent microstructure for the dried paste. It was also noticed that water loss caused by the increase of the suction pressure had a significant impact on the microstructural transformations. Significant changes in the quantitative values of the pore space parameters were also observed. Increase of suction pressure and water loss caused a decrease in porosity and changes in the values of morphometric parameters, such as pore distribution; for example, a significant increase of the number of pores of 0−10 μm size and changes in the geometric parameters of the pore space were noticed with the increase of suction pressure. The pore space with larger isometric pores was modified into a pore space with the dominance of small anisometric and fissure-like pores. The increased degree of anisotropy from a poorly-oriented to a highly-oriented microstructure was also observed. After rapid shrinkage the reduction in the number of pores, maximum pore diameter, and total pore perimeter was recorded. The process of rapid water loss induced the closure of very small pores. A similar effect was observed during the increase of the suction pressure, where the closure of pore space of the clay pastes was observed very clearly.

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Improved Double-Layer Soil Consolidation Theory and Its Application in Marine Soft Soil Engineering

Chen

Luo

Liu

et al. 2019

JMSE

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Marine soft soil foundation is a double-layer foundation structure with a crust layer and soft substratum. Moreover, it is common that there are various forms of drainage. Accordingly, based on Terzaghi’s consolidation theory and the continuous drainage boundary conditions theory of controllable drainage conditions, an improved double-layer soil consolidation theory considering continuous drainage boundary conditions was proposed. To improve the computational efficiency and accuracy, the Laplace transform and the Stehfest algorithm was used to deduce the numerical solution of the improved double-layer soil consolidation theory considering continuous drainage boundary conditions and to compile a computer program. Subsequently, the theory was validated and analyzed by the degenerated model of the perfectly permeable boundary conditions and the semi-permeable boundary conditions, respectively, which showed that this theory has higher accuracy. Simultaneously, the analysis of double-layer consolidation settlement under continuous drainage boundary conditions for marine soft soil foundation of Guangxi Binhai Highway was carried on. The result showed that the consolidation settlement calculated by the improved double-layer consolidation theory presented is basically consistent with the field measurement results, and that the correlation coefficient between them is higher. Accordingly, the research results can provide useful basic information for marine soft foundation engineering.

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Clay, engineering geology

Cited by 3 publications

References 46 publications

Characterization of <i>Amuda-Isuochi</i> Nigerian Clay Deposit for Potential Industrial Applications

Characterization of <i>Amuda-Isuochi</i> Nigerian Clay Deposit for Potential Industrial Applications

Acta Geologica Polonica

Improved Double-Layer Soil Consolidation Theory and Its Application in Marine Soft Soil Engineering

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