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Letteratura scientifica selezionata sul tema "Clay"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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Articoli di riviste sul tema "Clay"

Refai Kassab, Alaa El-Hosani, Azza Hassan Moubark, Waleed Hamdy Elkamash, and Kamal Mohamed Hafez Ismail. "Shear Strength of Unsaturated Soils with Different Plasticity." Journal of University of Shanghai for Science and Technology 23, no. 11 (2021): 197–217. http://dx.doi.org/10.51201/jusst/21/11887.

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A series of shear box tests were conducted on four different types of soils in this study. The first set , (clay1) is the host clay, Middle Delta Nile clay “MDNC” which was obtained from Mid Delta Nile zone, Qalyubiyya Governorate, Egypt. The second set, (clay2) consists of the host clay MDNC but mixed with 40% sand. The third set of tests (clay3) was carried out on natural low plastic clay samples brought from El-Tal El-Kbeer area in Ismailia Governorate. The fourth set (clayey sand -SC) consists of 25% of the host clay MDNC mixed with 75% sand. The purpose is to predict the unsaturated shear

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Korolev, V. A. "BIOTIC COMPONENT OF CLAYSOILS." Gruntovedenie 1, no. 16 (2021): 7–15. http://dx.doi.org/10.53278/2306-9139-2021-1-16-7-15.

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All kinds of micro- and macroorganisms live in the massifs of clay soils: plants living in (or on) clay soils are called pelitophytes (from the Greek πηλός - “clay” and phyton - “plant”), micro- and macroorganisms living in clays, or associated with clays, they are called pelitophiles (from the Greek πηλός - "clay" and φιλία - "love"), that is, "loving clays" or "prone to clays." The article analyzes these groups of organisms and describes their role in the formation of the properties of clay soils and ecological-geological systems.

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Lescinskis, Oskars, Ruta Švinka, and Visvaldis Švinka. "Common and Different in Latvian Clay Minerals." Key Engineering Materials 762 (February 2018): 268–72. http://dx.doi.org/10.4028/www.scientific.net/kem.762.268.

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Clays are materials consisting of clay minerals and non-clay minerals. Some applications allow to use raw clay others require to separate clay minerals from non-clay minerals. Clay mineral fraction is considered to be a nanofraction. Description and characterization of 3 different Latvian clay nanosized minerals from 3 different geological periods (clay Liepa from Devonian period, clay Vadakste from Triassic period and clay Apriki from Quaternary period) are summarized. The main mineral in these clays is illite, however the presence of kaolinite is observed and its quantity depends on geologic

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Chorom, M., P. Rengasamy, and RS Murray. "Clay dispersion as influenced by pH and net particle charge of sodic soils." Soil Research 32, no. 6 (1994): 1243. http://dx.doi.org/10.1071/sr9941243.

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The effect of changing pH on the dispersion of clay from sodic soils was investigated in relation to changes in net charge on clay particles. A positive relationship was obtained between pH and the percentage of dispersible clay for each soil clay. The percentage increase in net negative charge was also positively correlated with pH. However, the slopes of these relationships varied between soil clays. In general, the net negative charge was the primary factor in clay dispersion and the pH affected clay dispersion by changing the net charge on clay particles. In comparing the values for pure c

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Lefebvre, Guy, Karol Rohan, and Serge Douville. "Erosivity of natural intact structured clay: Evaluation." Canadian Geotechnical Journal 22, no. 4 (1985): 508–17. http://dx.doi.org/10.1139/t85-071.

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Previous studies on erodibility of cohesive soil are briefly reviewed and it is concluded that experimental observations have been mainly concerned with remolded and reconsolidated or weathered clays. The structure effect, which is considered important in the behaviour of natural intact clay, especially for Eastern Canadian clays, has not up to now been really considered in the evaluation of clay erodibility. This paper proposes a new laboratory technique for the study of the erodibility of natural intact clays and presents results of a testing program on three Canadian clays. The results indi

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Lakevičs, Vitālijs, Valentīna Stepanova, Santa Niedra, Inga Dušenkova, and Augusts Ruplis. "Thixotropic Properties of Latvian Illite Containing Clays." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (August 6, 2015): 133. http://dx.doi.org/10.17770/etr2013vol1.813.

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Thixotropic properties of Latvian Devonian and Quaternary clays were studied. Dynamic viscosity of the water clay suspensions were measured with a rotating viscometer. Influence of concentration, pH and modifiers on the thixotropic clay properties was analyzed. It was found that Latvian clays have thixotropic properties. Stability of clay suspensions is described with the thixotropy hysteresis loop. Increasing the speed of the viscometer rotation, dynamic viscosity of the clay suspension decreases. It was found that the solid phase concentration and mineralogical composition make an impact on

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Bekee, D., Edori, and E.S. "Geochemical Properties of Clays and Clay Pots from Kono Boue and Ara-Ekiti Communities in Nigeria." Pharmaceutical and Chemical Journal 8, no. 1 (2021): 53–60. https://doi.org/10.5281/zenodo.13957746.

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Clays and clay pots samples from two Southern Nigeria communities, Ara-Ekiti and Kono-Boue were studied to ascertain their mineralogical content and physicochemical parameters. The cation exchange capacity (CEC)were12.06, 5.97, 4.88 and 5.44 Cmol/Kg; bulk density, were 0.94, 1.20, 0.2 and 1.00 g/cm3, organic matter were 8.88, 3.29, 0.74 and 1.48% for Ara-Ekiti clay (AER), Kono-Boue clay (KBR), Ara-Ekiti clay pot (AEP) and Kono-Boue clay pot (KBP) respectively. The percentages of silt, clay and sand were 12.40, 30.00 and 57.60% for AER; 17.40, 24.00 and 58.60% for KBR; 9.40, 14.00 and 76.60% fo

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Saaedifar, D., A. Casarella, and J. Dijkstra. "Genesis of Quick Clay: A Nanometric Experimental Investigation on Geological Environment." IOP Conference Series: Earth and Environmental Science 1480, no. 1 (2025): 012098. https://doi.org/10.1088/1755-1315/1480/1/012098.

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Abstract Quick clays are fine-grained soils with high sensitivity that transform into a liquid when remoulded. The deposition history directly impacts the composition and microstructure of natural clays. This study examines the morphology at the nanoscale of two different sensitive Swedish clays (Lödöse and Kärra clay) to establish a connection between the microscopic features and the macroscopic mechanical behaviour observed at their intact and remoulded state. Using in-line holotomography, the nano-scale imaging instrument at the ID16B beamline of ESRF is employed to capture nano-level featu

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Incledion, Alexander, Megan Boseley, Rachael L. Moses, et al. "A New Look at the Purported Health Benefits of Commercial and Natural Clays." Biomolecules 11, no. 1 (2021): 58. http://dx.doi.org/10.3390/biom11010058.

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Clays attributed to have medicinal properties have been used since prehistoric times and are still used today as complementary medicines, which has given rise to unregulated “bioceutical” clays to treat skin conditions. Recently, clays with antibacterial characteristics have been proposed as alternatives to antibiotics, potentially overcoming modern day antibiotic resistance. Clays with suggested antibacterial properties were examined to establish their effects on common wound-infecting bacteria. Geochemical, microscopical, and toxicological characterization of clay particulates, their suspens

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Chu, Chengfu, Zilong Wu, Yongfeng Deng, Yonggui Chen, and Qiong Wang. "Intrinsic compression behavior of remolded sand–clay mixture." Canadian Geotechnical Journal 54, no. 7 (2017): 926–32. http://dx.doi.org/10.1139/cgj-2016-0453.

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A series of incremental loading oedometer tests was conducted on pure clays and sand–clay mixtures with various sand/clay ratios and clay mineral compositions. The void indexes Iv and IvH were introduced to evaluate their intrinsic compressibility. Test results revealed that Iv was more suitable for depicting the compression behavior of pure clays than IvH; whereas, for the compressibility of sand–clay mixtures, the normalized compression line by using Iv was obviously different from that of pure clays and traditional soils due to the presence of sand particles. Therefore, a four-phase analysi

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Più fonti

Tesi sul tema "Clay"

Taha, Ahmed M. "Interface Shear Behavior of Sensitive Marine Clays --Leda Clay." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28768.

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Leda clay, which is a type of sensitive marine clay in Canada, is a hazardous soil that could undergo sudden collapse and flow upon wetting and remolding. This type of soil causes many landslide disasters and foundation damage. The existence of Leda clay at or near the proximities of developed cities makes it challenging for infrastructure expansion, and therefore, challenging for geotechnical engineers. At the location where this sensitive marine clay exists, many foundation designers have adopted the use of deep foundations, such as pile foundations to support heavy structures. The shear beh

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Zhao, Feng. "Development of clay modifications for polymer/clay nanocomposites." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/7620.

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Three commercial clays: Cloisite Na+ , Cloisite 30B and Cloisite 15A were used to melt compound with a number of polymer matrices, including polypropylene (PP), poly(butylene terephthalate) (PBT) and polyamides (PA). X-ray diffraction (XRD), contact angle measurement and thermogravimetric analysis (TGA) showed small interlayer space, poor compatibility and low thermal stability of these nanocomposites, resulting in poor mechanical properties in composites. A number of modifications of commercial clays were carried out, including silylation and introduction of thermally stable surfactants, e.g.

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Brow, Lawrence Michael. "Clay Chairs." Thesis, University of Iowa, 1989. https://ir.uiowa.edu/etd/2796.

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Gonzalez‐Blanco, Laura. "Gas migration in deep argillaceous formations : Boom clay and indurated clays." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/406355.

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Deep geological disposal remains the preferred option at present for the management of long-living and heat-emitting radioactive waste, which consists of confining the waste during a very long period (several hundreds of thousands of years) by placing them in a deep geological formation. Therefore, the understanding of the long-term behaviour of formations is becoming a key issue to ensure the feasibility of the geological disposal facilities, particularly regarding the generation and migration of gases. The present PhD work aims at better understanding the complex hydro-mechanical response o

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Papargyris, Athanasios D. "Mechanical properties of clay and fibre reinforced clay-based ceramics." Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240685.

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Elder, Judith. "PMMA clay nanocomposites." Thesis, Durham University, 2009. http://etheses.dur.ac.uk/52/.

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Polymer clay nanocomposites (PCN) of poly(methyl methacrylate) (PMMA) and clay, were synthesised in-situ using a free radical suspension polymerisation technique. The weight fraction of clay in the PCN was systematically varied in order to understand the effect of clay on the physical properties of the resulting PCNs. However, unexpectedly it was found that the weight fraction of clay had a dramatic impact upon the molecular weight of the polymer matrix and a relationship between clay concentration and polymer molecular weight was established. Furthermore, it was also found that the change in

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Combs, Jasen Paul-Robert. "Altered clay vessels." Virtual Press, 2002. http://liblink.bsu.edu/uhtbin/catkey/1233190.

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The focus of the creative project was the artist exploration of altered forms and ash glaze techniques, as well as developing a new aesthetic of breaking free of old approaches, thus allowing him to express his emotions through the ceramic vessels. He developed and refined his technique of surface treatment on the vessels as he progressed through this project. His exploration into this new world of freedom helped him grow as an artist and emotionally.The artist desired to become a utilitarian potter at the beginning of his undergraduate studies but when he was introduced to the works of Paul S

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Chen, Biqiong. "Polymer-clay nanocomposites." Thesis, Queen Mary, University of London, 2004. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1854.

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Polymer-clay nanocomposites are attracting global interest principally because property enhancements are obtained at low clay particle loadings (1-5 wt%). However there is lack of fundamental understanding of such composites. The aim of this work is to provide an insight into the interaction between polymer and clay. This includes the driving force for intercalation, the reinforcement mechanisms and property-volume fraction relationships. Functionalised poly(ethylene glycol)-clay, poly(c-caprolactone)-clay and thermoplastic starch-clay nanocomposites with a range of polymer molecular weights,

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Dugan, Moi. "Narratives on clay /." Online version of thesis, 1993. http://hdl.handle.net/1850/11769.

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Prendergast, Jean O'Dea. "Splinters and clay." View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-1/rp/prendergastj/jeanprendergast.pdf.

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Più fonti

Libri sul tema "Clay"

Newman, A. C. D., 1929-, ed. Chemistry of clays and clay minerals. Wiley, 1987.

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Jakab, Cheryl. Clay. Smart Apple Media, 2006.

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Storey, Rita. Clay. Franklin Watts, 2006.

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Maxwell, Patricia Anne Ponder. Clay. MIRA, 2001.

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Publishing, Newbridge Educational, ed. Clay. Newbridge Educational Pub., 2003.

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Almond, David. Clay. Delacorte Press, 2005.

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Roussel, Mike. Clay. Rourke Enterprises, 1990.

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Storey, Rita. Clay. Smart Apple Media, 2008.

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Leigh, Ana. Clay. Pocket Star Books, 2004.

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Kent, Alan M. Clay. Amigo Books, 1991.

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Capitoli di libri sul tema "Clay"

Bergaya, Faïza, Maguy Jaber, and Jean-François Lambert. "Clays and Clay Minerals." In Rubber-Clay Nanocomposites. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118092866.ch1.

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Theng, Benny K. G. "Clays and Clay Minerals." In The Chemistry of Clay-Organic Reactions, 2nd ed. CRC Press, 2024. http://dx.doi.org/10.1201/9781003080244-1.

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Theng, Benny K. G. "Clays and Clay Minerals." In Clay Mineral Catalysis of Organic Reactions. CRC Press, 2018. http://dx.doi.org/10.1201/9780429465789-1.

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Manning, D. A. C. "Industrial clays: kaolin (china clay), ball clay and bentonite." In Introduction to Industrial Minerals. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1242-0_3.

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Rothwell, R. G. "Clay." In Minerals and Mineraloids in Marine Sediments. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1133-8_7.

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Nandi, Arpita. "Clay." In Selective Neck Dissection for Oral Cancer. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-12127-7_53-1.

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Nandi, Arpita. "Clay." In Selective Neck Dissection for Oral Cancer. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-12127-7_53-2.

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Gooch, Jan W. "Clay." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2433.

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Negrónk-Mendoza, Alicia. "Clay." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_303.

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Negrón-Mendoza, Alicia. "Clay." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_303.

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Atti di convegni sul tema "Clay"

Jordan, M. M., K. S. Sorbie, P. Jiang, M. D. Yuan, A. C. Todd, and L. Thiery. "The Effect of Clay Minerals, pH, Calcium and Temperature on the Adsorption of Phosphonate Scale Inhibitor onto Reservoir Core and Mineral Separates." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94049.

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Abstract During a scale inhibitor squeeze treatment, the dynamics of the inhibitor return is governed by the inhibitor/rock interaction. In the case of adsorption/desorption inhibitor treatments, this interaction is described through the inhibitor/rock adsorption isotherm. The rock mineralogy plays an important role in determining the nature of the adsorption isotherm and clays in particular are known to strongly affect the adsorption process. However, no previous work has (a) presented a systematic study of the effects of various clays on inhibitor adsorption and (b) clearly demonstrated the

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Yu, Long, Hui Zhou, Wen Gao, Jun Liu, and Yuxia Hu. "Spudcan Penetration in Clay-Sand-Clay Soils." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49316.

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Multi-layered soil conditions often exist in offshore practice. In some sites a thin layer of medium dense sand lays between firm to stiff clay layers. In these cases the ultimate bearing capacity of foundations can be increased due to the strong sand layer by comparing with foundations in uniform clay. However, there is also a potential of reduction in foundation capacity when the foundation punches through the sand layer. The punch-through failure can occur during either pre-loading or storm loading. In this study, the continuous penetration of spudcan foundations on clay-sand-clay soils was

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Mondol, Nazmul Haque. "Velocity anisotropy in experimentally compacted clay-silt and clay-clay mixtures." In SEG Technical Program Expanded Abstracts 2012. Society of Exploration Geophysicists, 2012. http://dx.doi.org/10.1190/segam2012-0125.1.

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Horvath, William, Michael T. Myers, and Lori A. Hathon. "Physics Based Permeability Models Based on Thomas-Stieber Plots." In 2023 SPWLA 64th Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2023. http://dx.doi.org/10.30632/spwla-2023-0027.

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A Staged Differential Effective Medium (SDEM) model is applied to interpret the permeability in thin-bedded shaly sands. In this model, the permeability varies with the amount and distribution of clay minerals. The model allows continuous interpolation between a series and parallel distribution of the clay minerals. Dispersed clays are added before structural clays and matrix grains. The longest length scale, clay laminations, are the last phase added to the massive sand matrix. The resulting equations include the distribution parameters for each inclusion. The standard Thomas-Stieber (T-S) mo

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Di Emidio, G., W. F. Van Impe, and R. D. Verástegui Flores. "Advances in Geosynthetic Clay Liners: Polymer Enhanced Clays." In Geo-Frontiers Congress 2011. American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41165(397)197.

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Saihood, Tariq, Michael T. Myers, Lori A. Hathon, and Gabriel Unomah. "Enhancing the Thomas-Stieber Model With Sonic Log Data for Improved Prediction of Clay Geometries and Total Porosity in Shaly Sands." In 2024 SPWLA 65th Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2024. https://doi.org/10.30632/spwla-2024-0126.

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The Thomas-Stieber method has been widely used to evaluate clay-rich, thin-bedded clastic reservoirs by accounting for the distribution of clay minerals within the rock matrix. In such reservoirs, clay content has a profound impact on porosity and, consequently, hydrocarbon storage. However, the limitations of the conventional model have prompted the development of an extended version, which incorporates sonic log data as a crucial third axis in the analysis. The extended Thomas-Stieber model with sonic log integration hinges on three key variables: the volume fractions of dispersed clay (Xd),

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A R, Sindhu, Minukrishna P, and B. M. Abraham. "Experimental Study on the Impact of Type of Sulphate in Lime Stabilised Clays." In International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.14.

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Marine clays are distinguished by high compressibility and low shear strength. It has been reported that lime stabilisation is very much potent, and can be used as an ideal ground improvement technique in the case of marine clays. Cochin marine clays are sometimes abundant in primary and secondary sources of sulphates of sodium, lithium, potassium and calcium. Different types of sulphates may have different impact on lime stabilised clays. Present study investigates the effect of different types of sulphates in lime treated marine clays. Marine clay samples were collected by auger boring and a

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Villarroel, Andres, Michael Myers, and Lori Hathon. "Integrating the Thomas-Stieber Analysis With a Staged Differential Effective Medium Model for Saturation Interpretation of Thin-Bedded Shaly Sands." In 2022 SPWLA 63rd Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2022. http://dx.doi.org/10.30632/spwla-2022-0035.

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A Staged Differential Effective Medium (SDEM) model based on the Hanai-Bruggeman equation is applied to interpret water saturation in shaly sands. In this model, the conductivity of the formation changes when different volumes of clays, oil, and quartz (inclusions) are successively distributed in the host. The host continuously varies as the inclusions are added. The resulting equations require the conductivity and distribution parameters, which are assumed constant. A Thomas-Stieber analysis allows the separation of clay types that are distributed at different length scales. It allows estimat

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McDonnell, Kevin T., Hong Qin, and Robert A. Wlodarczyk. "Virtual clay." In the 2001 symposium. ACM Press, 2001. http://dx.doi.org/10.1145/364338.364395.

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Takahashi, Nobuo. "Mathematical clay." In ACM SIGGRAPH ASIA 2010 Computer Animation Festival. ACM Press, 2010. http://dx.doi.org/10.1145/1900264.1900275.

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Rapporti di organizzazioni sul tema "Clay"

Nagy, Kathryn L. DE-FG02-06ER15364: Final Technical Report Nanoscale Reactivity of Clays, Clay Analogues (Micas), and Clay Minerals. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/934383.

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Beul, Jasmine. Design x Clay. Iowa State University, 2022. http://dx.doi.org/10.31274/cc-20240624-504.

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Deming, M. Elen, and Paul Littleton. Carmel Clay Central Park. Landscape Architecture Foundation, 2013. http://dx.doi.org/10.31353/cs0470.

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Johnston, Jeffery. Clay, roots, and coexistence. Portland State University Library, 2000. http://dx.doi.org/10.15760/etd.2764.

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Columber, Christopher Eugene. Structural clay tile component behavior. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/125406.

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Thomas, J. K. Photochemistry on, and Nature of Adsorbed Species on Colloidal Clay and Model Clay Systems. Defense Technical Information Center, 1987. http://dx.doi.org/10.21236/ada186099.

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Keene, Thea. Throwing Up: A Self-Guided Study in Clay Bodies. Montana State University, 2022. https://doi.org/10.15788/s2022.curio1.

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Based on the demands of her upcoming thesis project, Studio Arts major Thea Keene delves into the reasoning and technicalities of her research in clay bodies. Keene explains the dilemma caused by the range of firing temperatures for different types of clay, and how it influences the decision to experiment with new ones. Her research includes the tedious process of mixing and curing the clay, and a bit on the physics of throwing on the wheel. After testing three low-fire clay mixtures, Keene ultimately decides to use an earthenware terracotta for its color and maneuverability on the wheel.

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Di Pietro, S. A., C. Joseph, and M. Zavarin. Neptunium(IV) Diffusion through Bentonite Clay. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1605055.

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Gilman, Jeffrey W., Takashi Kashiwagi, Alexander B. Morgan, et al. Flammability of polymer clay nanocomposites consortium:. National Institute of Standards and Technology, 2000. http://dx.doi.org/10.6028/nist.ir.6531.

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Flanagan, R. D. Behavior of structural clay tile infilled frames. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/130659.

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