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Journal articles on the topic 'Clays'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Yetchié Tchonrontcha, Koné, Abollé Abollé, Kambiré Ollo, Koffi Konan Sylvestre, Kouadio Kouakou Etienne, and Kimou Kouakou Jocelin. "Removal of methyl orange in Aqueous Media using two clays from Côte d'Ivoire." Mediterranean Journal of Chemistry 15, no. 1 (2025): 44–55. https://doi.org/10.13171/mjc02501081810ollo.

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This work used Boundiali and Man clays to eliminate methyl orange in an aqueous medium. These clays were activated with hydrochloric acid and then characterized by scanning electron microscopy, X-ray diffractogram, Brunauer–Emmett–Teller (BET) method, and zero charge pH. Methyl orange concentration was monitored during adsorption using a UV-visible spectrophotometer. Characterization showed that the clays have many micropores, mesopores, and few macropores. The specific surface areas of these clays are equal to 39,084 m2 g-1 and 39,722 m2 g-1 for Boundiali and Man clays, respectively. These cl

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Lakevičs, Vitālijs, Līga Bērziņa-Cimdiņa, Augusts Ruplis, and Juris Pelšs. "SORPTION ROPERTIES OF LATVIAN CLAYS AND ENVIRONMENTAL PROTECTION SURVEY." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (August 3, 2015): 222. http://dx.doi.org/10.17770/etr2009vol1.1100.

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The survey has been comprised in historical sequence. It has been attempted to group literature sources in a way that we consider to be the most relevant in the publication. Analysis of literature led to the following conclusions: during the last years most important and most advanced ways in investigations of Latvian clay surface characteristics have been found: Value determination of clay specific surface; Clay’s porous structure investigation; Cation exchange capacity determination; Characteristics of organoclays; Catalytic characteristics of Latvian clays; Practical usage of clays in waste

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3

Niu, Shuo. "Behavioral analysis and structural evolution of bothkennar clay: Insights from laboratory and field investigations." Advances in Engineering Innovation 13, no. 1 (2024): 55–70. https://doi.org/10.54254/2977-3903/13/2024140.

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Bothkennar clay is a type of soft clay found near the Firth of Forth in Scotland, at the Bothkennar site, which was established in the late 1980s as a national research center for advanced studies on soft clays. This paper analyzes the behavior of Bothkennar clay under both natural and remolded conditions, drawing on data from laboratory and field experiments. Special attention is given to the results of triaxial tests and oedometer tests, which are crucial for understanding the stress-strain response under different stress paths. The analysis largely employs the Cam-clay model, a widely used

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Muhammad, Abubakar, Karl-Christian Thienel, and Sebastian Scherb. "Calcined Clays from Nigeria—Properties and Performance of Supplementary Cementitious Materials Suitable for Producing Level 1 Concrete." Materials 16, no. 7 (2023): 2684. http://dx.doi.org/10.3390/ma16072684.

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In this work, four naturally occurring (two kaolinite-rich and two smectite-rich) clay samples were collected from different areas around the Ashaka cement production plant, located in Gombe State, Nigeria and calcined in a laboratory. The mineralogical characterization of the clays was carried out by XRD. The hydration kinetics of the calcined clay–cement systems were monitored by isothermal calorimetry. Workability was determined using the flow table method. The reactivity of the calcined clays was determined from the solubility of Si and Al ions and the strength activity index. All calcined

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5

McBride, M. B. "Chemistry of Clays and Clay Minerals." Clays and Clay Minerals 36, no. 5 (1988): 480. http://dx.doi.org/10.1346/ccmn.1988.0360515.

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6

OLIS, ALEXANDER C. "Chemistry of Clays and Clay Minerals." Soil Science 147, no. 4 (1989): 309. http://dx.doi.org/10.1097/00010694-198904000-00012.

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7

Low, Philip F. "Chemistry of clays and clay minerals." Journal of Colloid and Interface Science 125, no. 1 (1988): 363–64. http://dx.doi.org/10.1016/0021-9797(88)90091-4.

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8

Yapaskurt, O. V., and V. I. Koporulin. "Conference on clays and clay minerals." Lithology and Mineral Resources 40, no. 2 (2005): 193–94. http://dx.doi.org/10.1007/s10987-005-0021-0.

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9

Drits, V. A., and B. B. Zvyagina. "International conference “Clays and Clay Minerals”." Lithology and Mineral Resources 42, no. 5 (2007): 501–2. http://dx.doi.org/10.1134/s0024490207050094.

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10

Hunter, Keith A. "Chemistry of clays and clay minerals." Geochimica et Cosmochimica Acta 52, no. 5 (1988): 1319. http://dx.doi.org/10.1016/0016-7037(88)90287-6.

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KOROLEV, V. А. "THE ECOLOGICAL ROLE OF CLAYS AND CLAY MINERALS." Engineering Geology World 14, no. 1 (2019): 60–71. http://dx.doi.org/10.25296/1993-5056-2019-14-1-60-71.

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The article considers the ecological role played by clays and clay minerals in the ecosystem and the biosphere as a whole. The value of clays and clay minerals in the origin of life on Earth and the formation of RNA are analyzed, due to the periodicity of the microstructure of these minerals, their physicochemical activity and sorption capacity with respect to amino acids, nucleotides, proteins and RNA. The processes of interaction of clay minerals with organic matter are considered, including under conditions of hydrothermal conditions, which have specific features that contribute to the orig

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12

MANGO-ITULAMYA, Lavie A., Frédéric COLLIN, Pascal PILATE, Fabienne COURTEJOIE, and Nathalie FAGEL. "Evaluation of Belgian clays for manufacturing compressed earth blocks." Geologica Belgica 22, no. 3-4 (2019): 139–48. http://dx.doi.org/10.20341/gb.2019.002.

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This study aims to characterize Belgian clays in order to evaluate their use for manufacture of compressed earth blocks (CEB). Nineteen Belgian clay deposits were sampled in 56 sites and 135 samples were collected and analyzed. The analyses focus on the determination of particle size, plasticity, nature and mineralogy as the main characteristics for assessing the suitability of the raw clays to make CEB. These analyses allow for classifying the sampled clay deposits in three categories: clays that can be used unchanged to make CEB (2 clay deposits), clays that are suitable for the manufacture

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Karstunen, Minna, and Mirva Koskinen. "Plastic anisotropy of soft reconstituted clays." Canadian Geotechnical Journal 45, no. 3 (2008): 314–28. http://dx.doi.org/10.1139/t07-073.

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The aim of the paper is to extend the experimental validation of the S-CLAY1 model, which is a recently proposed elastoplastic constitutive model that accounts for initial and plastic strain-induced anisotropy. Drained stress path controlled tests were performed on reconstituted samples of four Finnish clays to study the effects of anisotropy in the absence of the complexities of structure present in natural undisturbed clays. Each test involved several loading, unloading, and reloading stages with different values of stress ratio and, hence, induced noticeable changes in the fabric anisotropy

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Pozo, Manuel, and José Calvo. "An Overview of Authigenic Magnesian Clays." Minerals 8, no. 11 (2018): 520. http://dx.doi.org/10.3390/min8110520.

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Clay authigenesis mostly concerns: (a) the formation of clays by direct precipitation from solution, called “neoformation” and (b) development of clays by transformation of precursor minerals. Precipitation from solution implies that a new mineral structure crystallizes, so that a prior mineral structure is not inherited. Transformation of precursor detrital minerals, a process also termed “neoformation by addition”, can be conducted whether throughout precipitation on pre-existing natural surfaces or transformation and reaction on pre-existing surfaces. Both processes have been recognized as

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15

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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Souto, Carlos Magno Rocha Almeida, Danielly Vieira Lucena, Clarice Oliveira Da Rocha, Maria Eduarda Da Silva Barbosa, and Syane Marcelle Miranda. "Desempenho reológico e de filtração de fluidos de perfuração base óleo preparados com argilas bentoníticas provenientes do município de Boa Vista-PB." Revista Principia - Divulgação Científica e Tecnológica do IFPB 1, no. 51 (2020): 22. http://dx.doi.org/10.18265/1517-0306a2020v1n51p22-29.

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<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p>Bentonite clays are an essential input to the production of drilling fluids. One of the main consumer segments of bentonite clay is the oil industry, where it is used as a thixotropic agent in drilling fluids in oil wells, attributing to the fluids physical characteristics and specific chemical and rheological properties. According to Leal (2012), the physico-chemical and rheological properties must be carefully controlled so that the fluid can perform all its functions, such as cooling the

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Datsenko, L., M. Hanchuk, Yu Chebanova, S. Malyuta, and O. Mazykina. "POLOGIVSKIY KAOLIN DEPOSIT: GEOLOGY, MINERAL AND CHEMICAL COMPOSITION, TECHNOLOGICAL PROPERTIES." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 2(97) (2022): 74–84. http://dx.doi.org/10.17721/1728-2713.97.10.

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The area of the Pologivskiy deposit of kaolins and refractory clays is located on the border of two geological regions: the Azov crystalline massif and the Konksko-Yalynska depression. Precambrian crystalline rocks and sediments of the Cretaceous, Paleogene, Neogene, and Quaternary systems take part in the geological structure of the district. The geological structure of the district is based on the results of field exploration (23–25) and geological surveying works. Deposits of the Quaternary system are widespread in the territory and are similar to mantle on the underlying rocks. The lower b

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Efendiyeva, Zarifa J., Maral G. Aliyeva, and Matanat J. Hamashayeva. "Possibility of complex use of bentonite clays and modeling of research processes." Journal of Geology, Geography and Geoecology 32, no. 2 (2023): 233–40. http://dx.doi.org/10.15421/112322.

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   The efficient and complex use of resources of high quality bentonite clays, as well as the application of relatively low quality bentonite clays in accordance with their mineralogical and lithological properties are identified in the article. As Azerbaijan’s oil industry developed, interest in studying the geological structure of bentonite deposits increased. Prospects for bentonite production to reach 1-1.5 million tons of annual productivity in the next 40-50 years are related to the industrial development of the Daşsalakhli deposit, the largest in terms of resources (e

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O, Ademila, Ogunribido T. H. T, and Abidoye J. M. "Geotechnical and geochemical appraisal of IFON clay, Southwestern Nigeria: Implications for industrial utilization." International Journal of Physical Research 7, no. 1 (2019): 11. http://dx.doi.org/10.14419/ijpr.v7i1.26336.

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Clays are geological materials of economic potential in the manufacturing and environmental industries. Geotechnical properties and geochemical composition of Ifon clay deposits in Ondo State, Nigeria were investigated with the aim of determining their economic potentials. The geotechnical investigation includes consistency limits, strength, permeability and firing tests, while, X-ray fluorescence (XRF) method was used for determination of the bulk elemental composition of the clays using standard techniques. Geotechnical appraisal of the clay deposits revealed that high proportion of clay siz

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Wienhage, Gabriel Henrique, Vinícius Henrique de Freitas, Julio Zeppone Carlos, et al. "Flash Calcination of Kaolinite Clay in a Pilot Reactor: Evaluation of Clay Color Change in Oxidizing, Inert and Reducing Atmospheres." Journal of Building Material Science 7, no. 1 (2025): 73–82. https://doi.org/10.30564/jbms.v7i1.8104.

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Cement production, while essential for global infrastructure, contributes significantly to carbon dioxide emissions, accounting for approximately 7% of total emissions. To mitigate these environmental impacts, flash calcination of kaolinitic clays has been investigated as a sustainable alternative. This technique involves the rapid heating of clays, enabling their use as supplementary cementitious materials. The primary objective of this study was to modify the color of calcined clay in various atmospheres (oxidizing, inert, and reducing) to achieve a grayish tone similar to commercial cement

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Katti, Dinesh R., Zillur R. Patwary, and Kalpana S. Katti. "Modelling clay–fluid interactions in montmorillonite clays." Environmental Geotechnics 4, no. 5 (2017): 322–38. http://dx.doi.org/10.1680/jenge.14.00027.

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22

Bastida, J., M. T. Lores, J. De la Torre, P. Pardo, and A. M. López Buendía. "Modificación microestructural de minerales arcillosos en ball clays de Teruel mediante tratamiento térmico." Boletín de la Sociedad Española de Cerámica y Vidrio 45, no. 1 (2006): 38–45. http://dx.doi.org/10.3989/cyv.2006.v45.i1.327.

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23

El Ouahabi, M., L. Daoudi, and N. Fagel. "Mineralogical and geotechnical characterization of clays from northern Morocco for their potential use in the ceramic industry." Clay Minerals 49, no. 1 (2014): 35–51. http://dx.doi.org/10.1180/claymin.2014.049.1.04.

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AbstractThis study focuses on the mineralogical and geotechnical characterization of northern Moroccan clays from the Tangier and Tetouan areas and compares them with the main clay deposits used in the Moroccan ceramic industry (from Meknes, Fes, Salé and Safi regions). Sampled clays were analysed by X-ray diffraction on bulk and clay (<2 μm) fractions to identify the mineralogical assemblages of the clay outcrops. Further analyses were conducted to determine the particle size distribution (laser diffraction particle analyser), the total organic matter content (Loss- On-Ignition measurement

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Oliveira, F. S., A. F. D. C. Varajão, C. A. C. Varajão, and B. Boulangé. "A comparison of properties of clay minerals in isalteritic and in degraded facies." Clay Minerals 48, no. 5 (2013): 697–711. http://dx.doi.org/10.1180/claymin.2013.048.5.03.

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AbstractThe mineralogical, geochemical and micromorphological features of an isalteritic clay facies, which originated from weathering of an anorthosite, were compared to those of clay facies derived from the degradation of a bauxite developed from the same rock. The isalteritic clay was formed by the hydrolytic alteration of plagioclase, whereas the degraded clays were formed by decomposition of gibbsite and neoformation of kaolinite. This resilification process resulted from the reintroduction of silica via the oscillation of the phreatic level and/or the decomposition of organic matter on t

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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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Robert, M., M. Hardy, and F. Elsass. "Crystallochemistry, properties and organization of soil clays derived from major sedimentary rocks in France." Clay Minerals 26, no. 3 (1991): 409–20. http://dx.doi.org/10.1180/claymin.1991.026.3.09.

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AbstractThe nature, crystallochemistry, organization and surface properties of soil clays derived from the most representative sedimentary formations of France are described, using qualitative and quantitative mineralogical methods and high resolution transmission microscopy (HRTEM). The main results show that soil clays differ significantly from reference clays. Even when 2:1 phyllosilicates are dominant, the clays always contain multimineral phases. The smectitic component is dioctahedral and of beidellite type. Soil clay organization is specific: all the clay particles have a short lateral

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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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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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Anyukhina, Anna V., Valerii V. Seredin, Andrey V. Andrianov, and Tatiana Yu Khludeneva. "Influence of Heat Treatment of Clays on Their Adsorption of Methylene Blue Dye." Недропользование 21, no. 2 (2021): 52–57. http://dx.doi.org/10.15593/2712-8008/2021.2.1.

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The adsorption activity of soils largely depends on their composition and properties and, first of all, on the specific surface area and energy potential of clay particles. For the formation of "specified" properties, including adsorption, various methods of clay activation have been developed: thermal, ultraviolet, ultrasonic, mechanical, acidic, alkaline. However, despite the published data, the issues of the influence of heat treatment on the formation of the clays properties, including adsorption ones, have not been sufficiently studied. In this regard, an assessment was made of the of cla

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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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Nisticò, Roberto. "A Comprehensive Study on the Applications of Clays into Advanced Technologies, with a Particular Attention on Biomedicine and Environmental Remediation." Inorganics 10, no. 3 (2022): 40. http://dx.doi.org/10.3390/inorganics10030040.

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In recent years, a great interest has arisen around the integration of naturally occurring clays into a plethora of advanced technological applications, quite far from the typical fabrication of traditional ceramics. This “second (technological) life” of clays into fields of emerging interest is mainly due to clays’ peculiar properties, in particular their ability to exchange (capture) ions, their layered structure, surface area and reactivity, and their biocompatibility. Since the maximization of clay performances/exploitations passes through the comprehension of the mechanisms involved, this

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Meethong, Nonglak, Wanwisa Pattanasiriwisawa, Weenawan Somphon, Waraporn Tanthanuch, and Sutham Srilomsak. "Properties of Dan Kwian, Sukhothai and Ratchaburi Pottery Clays Fired at 700 and 900 °C." Key Engineering Materials 608 (April 2014): 47–61. http://dx.doi.org/10.4028/www.scientific.net/kem.608.47.

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Dan Kwian, Sukhothai and Ratchaburi pottery clays are economically important pottery clays. They are well known in the Thai ceramic society for making Dan Kwian pottery, Sawankhalok pottery and Dragon jars, respectively. There have been several studies of these pottery clays. However, few of them used statistics to analyze their results. This work is a comparative study of the compositions and properties of these three pottery clays using statistical software to analyze the results. Results show that the major components of these pottery clays are SiO2 and Al2O3. The Modulus of Rupture (MOR) o

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Lev, Chernyak, Salnik Valery, and Dorogan Nataliia. "Analysis of clay types and their binary systems." Technology audit and production reserves 5, no. 3(67) (2022): 15–19. https://doi.org/10.15587/2706-5448.2022.266498.

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<em>The objects of study were the Mali Budyshcha and Opishnia clays of two deposits in the Poltava region (Ukraine), binary systems of these clays, and ceramics based on them. It is noted that the efficiency of the practical use of these clays can be increased taking into account the peculiarities of their mineralogical composition. The features of the qualitative mineralogical composition of clays were studied by the methods of chemical, X-ray phase and thermal analysis. The amount of rock-forming minerals was determined using the new computer program «Mineral». It has been establ

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Latupeirissa, Jolantje, and Eirene G. Fransina. "The Characterization Of Clays From Latuhalat Village Activated Using Ammonium Nitrate." Indonesian Journal of Chemical Research 1, no. 2 (2014): 78–82. http://dx.doi.org/10.30598/ijcr.2014.1-jol.

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Research on characterization clays from Latuhalat village before and after the activation using ammonium nitrate has been carried out. The brick was grinded, washed with aquadest and filtered. The clays was dried for 4 h in oven at 120Â°C, then it was soaked in HCl 1M for 30 min and was filtered. The clays in oven at 110Â°C for 5 h. The clays were sieved and activated using ammonium nitrate solution 700 ppm for 5 hours followed by filtration and heating in a furnace with temperature 5000C for 4 hours. The results of this research show that the adsorption of Pb2+ metal ions by ammonium nitrate

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De Souza Santos, P. "The Use of Clay Particle Morphology Studies to Characterize Industrial Clay Deposits: Examples from Brazil." Clay Minerals 28, no. 4 (1993): 539–53. http://dx.doi.org/10.1180/claymin.1993.028.4.05.

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AbstractThe use of transmission electron microscopy in association with other methods is described for the characterization of Brazilian industrial clays, especially kaolinitic-halloysitic clays. Examples are presented from: (a) tubular 7 Å-halloysites and the characterization of mixtures with ordered and disordered kaolinites in residual china clays; (b) tubular kaolinitic clay from Piedade, São Paulo; (c) platey 10 Å-halloysite from Poģos de Caldas, Minas Gerais; (d) rolled forms similar to 10 Å-tubular halloysite formed by repeated K Ac intercalation in well ordered kaolinite; (e) use of pa

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Sant’Ana, Maria Angélica Kramer, Monica Castoldi Borlini Gadioli, and Mariane Costalonga de Aguiar. "Characterization of Clays of South the State of Espirito Santo." Revista de Gestão Social e Ambiental 19, no. 2 (2025): e011359. https://doi.org/10.24857/rgsa.v19n2-089.

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Objective: To characterize the clays of the state of Espírito Santo and evaluate their physical-chemical and mineralogical properties, in order to identify their potential for industrial applications, especially in the manufacture of ceramic materials. In addition, we sought to propose improvements in the beneficiation processes, if necessary, to optimize the performance of these materials in different applications. Theoretical Framework: In Brazil there are about 6903 ceramic factories, with an annual turnover of 18 billion, and this is very important for the country because it indicates the

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Pannirselvam, Muthu, R. K. Gupta, S. N. Bhattacharya, and Robert A. Shanks. "Intercalation of Montmorillonite by Interlayer Adsorption and Complex Formation." Advanced Materials Research 29-30 (November 2007): 295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.29-30.295.

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Clays are essentially composed of crystalline particles of one or more members of a small group of minerals. The ability of clays to intercalate certain organic substances has been known for a very long time. There is a scope in these clay structures for isomorphous replacement, that is, for substitution of Na+ by cations of similar size but usually of lower valency. This research aims at identifying suitable additives for pretreatment of clay and determining the effect of different classes of compounds (intercalants) on the d-spacing expansion of clay layers. This paper addresses a different

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Zaccaron, Alexandre, Vítor de Souza Nandi, Marcelo Dal Bó, Michael Peterson, Elídio Angioletto, and Adriano Michael Bernardin. "Characterization and use of clays and argillites from the south of Santa Catarina State, Brazil, for the manufacture of clay ceramics." Clay Minerals 55, no. 2 (2020): 172–83. http://dx.doi.org/10.1180/clm.2020.23.

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AbstractSix clays from various deposits were studied for their use in the production of structural clay products. The clays were characterized using chemical (X-ray fluorescence), mineralogical (X-ray diffraction) and thermal (differential scanning calorimetry/thermogravimetry) analyses. Particle-size distribution was determined by laser diffraction, plasticity by the Pfefferkorn method and the residue by the sieve-size method. Next, specimens were formed by extrusion and characterized by their linear thermal shrinkage (on drying and firing), water absorption, bulk density, porosity and compre

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Nassetti, G. "Heavy Clays." Key Engineering Materials 53-55 (January 1991): 794–96. http://dx.doi.org/10.4028/www.scientific.net/kem.53-55.794.

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Poncelet, G. "Pillared Clays." Clays and Clay Minerals 38, no. 2 (1990): 223. http://dx.doi.org/10.1346/ccmn.1990.0380217.

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Farfan-Torres, EM, and P. Grange. "Pillared Clays." Journal de Chimie Physique 87 (1990): 1547–60. http://dx.doi.org/10.1051/jcp/1990871547.

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PETKEWICH, RACHEL. "HEALING CLAYS." Chemical & Engineering News 86, no. 17 (2008): 48–49. http://dx.doi.org/10.1021/cen-v086n017.p048.

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Churchman, Jock, Dean Hesterberg, and Balwant Singh. "Soil clays." Applied Clay Science 64 (August 2012): 1–3. http://dx.doi.org/10.1016/j.clay.2012.06.012.

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Manning, D. A. C. "Environmental Interactions of Clays: Clays and the Enironment." Clay Minerals 34, no. 2 (1999): 379–80. http://dx.doi.org/10.1180/claymin.1999.034.2.15.

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Biswas, Bhabananda, Jérôme Labille, and Benedicte Prelot. "Clays and modified clays in remediating environmental pollutants." Environmental Science and Pollution Research 27, no. 31 (2020): 38381–83. http://dx.doi.org/10.1007/s11356-020-09828-4.

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Paramith, Tika, Johnner P Sitompul, and Hyung Woo Lee. "The effect of organobentonites from spent bleaching earth (SBE) and commercial bentonite on nanocomposite properties." International Journal of Engineering & Technology 7, no. 4 (2018): 2000. http://dx.doi.org/10.14419/ijet.v7i4.15317.

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This paper concerns on synthesis of nanocomposites consisting of Poly(lactic acid) (PLA) and clays. Two types of clays were regenerated organobentonite and commercial organobentonite. PLA and clays were melt extruded using single-screw extruder. The extruded compound was pelletized, then hot pressed using compression molding machine. Regenerated organobentonite was obtained from regeneration of spent bleaching earth (SBE) using solvent extraction and oxidation method. Afterwards, regenerated SBE modified by organic compound. While, commercial organobentonite was directly modified of commercial

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Williams, Lynda B. "Geomimicry: harnessing the antibacterial action of clays." Clay Minerals 52, no. 1 (2017): 1–24. http://dx.doi.org/10.1180/claymin.2017.052.1.01.

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AbstractA decade of research on clays that kill human pathogens, including antibiotic-resistant strains such as methicillin-resistant S. aureus (MRSA), has documented their common characteristics. Worldwide, ∼5% of clays tested to date are antibacterial when hydrated. Most antibacterial clays are from hydrothermally altered volcanics, where volcanogenic fluids produce minerals containing reduced metals. Ferruginous illite-smectite (I-S) is the most common clay mineral, although kaolins dominate some samples. Antibacterial clay mineral assemblages may contain other reduced Fe minerals (e.g. pyr

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Usmanov, Safar, Rustamjon Anorov, Izzat Eshmetov, Dilnozakhan Salikhanova, and Babur Adizov. "The effect of mechanical activation methods on the properties of local clays and waste bentonites." E3S Web of Conferences 390 (2023): 05035. http://dx.doi.org/10.1051/e3sconf/202339005035.

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One of the most important indicators of mechanical activation of clay minerals is the effect of activation time on the strength of the mixture. One of the most important parameters in the preparation of drilling fluid based on clays is their ability to swell, and the effect on the swelling of clays during mechanical activation was studied. One of the most important parameters of clays used in the preparation of drilling fluids resistant to thermomechanical effects is their colloidal index. Therefore, the effect of mechanical activation time on the colloidal index of these clays was studied. Th

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Lite, M. C., E. C. Tănăsescu, L. O. Secăreanu, I. M. Săndulache, O. Iordache, and E. Perdum. "REVIEW ON DIFFERENT TYPES OF CLAY AND THEIR USE AS ANTIMICROBIAL AGENTS FOR TEXTILES TREATMENT." TEXTEH Proceedings 2021 (September 22, 2021): 321–27. http://dx.doi.org/10.35530/tt.2021.51.

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Traditional uses of clay as medicine started in prehistoric times (Aboriginal times). Natural clays have been used in ancient and modern medicine, but the mechanism that makes certain clays lethal to bacterial pathogens has not been yet identified. The aim of this paper is to identify the proper clays that could be used in textile industry for improving textiles` functionality, based on the information extracted from literature. It is important, to differentiate between the properties that make a clay ‘healing’, versus what makes it ‘antibacterial’. So far, literature is abundant in reports re

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Wang, Zhijing (Zee), Hui Wang, and Michael E. Cates. "Effective elastic properties of solid clays." GEOPHYSICS 66, no. 2 (2001): 428–40. http://dx.doi.org/10.1190/1.1444934.

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Clay minerals are perhaps the most abundant materials in the earth’s upper crust. As such, their elastic properties are extremely important in seismic exploration, seismic reservoir characterization, and sonic‐log interpretation. Because little exists in the literature on elastic properties of clays, we have designed a method of measuring effective elastic properties of solid clays (clays without pores). In this method, clay minerals are mixed with a material with known elastic properties to make composite samples. Elastic properties of these clay minerals are then inverted from the measured e

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