Journal ArticleDOI
Electron Micrographic Studies of Clays
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TLDR
In order to provide a set of reference photographs to be used in identification studies, electron micrographs at relatively high magnification (40,000 to 132,000 diameters), together with some electron diffraction patterns, have been obtained of a group of (a) kaolinites, (b) halloysites, and (c) South Texas outcrop soil samples as mentioned in this paper.Abstract:
In order to provide a set of reference photographs to be used in identification studies, electron micrographs at relatively high magnification (40,000 to 132,000 diameters), together with some electron diffraction patterns, have been obtained of a group of (a) kaolinites, (b) halloysites, and (c) South Texas outcrop soil samples. Some of the kaolinites consist of well-formed hexagonal crystal plates with edges still sharp at a magnification of 132,000 diameters. Other kaolinites consist of irregular, relatively thin crystal sheets, which may be bent or folded. In one instance it has been possible to demonstrate that the average thickness of the sheets is only 10 A. At high magnification the halloysite clay minerals exhibit a structure consisting of rolled sheets, rather than hollow rods. In some cases, it is evident that several separate crystal sheets are coaxially rolled to form multiple concentric hollow tubes. In the South Texas outcrop samples, the morphology is very complex, as the samples do not consist of one uniform type of particle. Matted sheets composed of interlaced bundles of lath-like particles have been observed. These oriented particles exhibit typical “fiber” type electron diffraction patterns. Kikuchi lines were observed in a thin quartz crystal plate, examined for comparative purposes.read more
Citations
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Journal ArticleDOI
Scanning electron microscopy of clays and clay minerals
TL;DR: Authigenic kaolins make up the bulk of the examples because their larger crystallite size, better crystallinity, and open texture make them more suited to examination by the SEM than most other clay mineral types as discussed by the authors.
Journal ArticleDOI
Improved strength and reduced permeability of stabilized peat: Focus on application of kaolin as a pozzolanic additive
TL;DR: In this paper, the authors demonstrate the application of kaolin as a pozzolanic additive of stabilized peat and demonstrate the unconfined compressive strength of the test sample with 10% partial replacement with kaolin.
Phase and microstructural characterization of kaolin clays from north western pakistan
TL;DR: The chemistry, phase constitution and thermal behavior of these local clays were found close to those of high quality English china clays as mentioned in this paper, and the microstructure of these clays comprised typical book-and flake-like kaolinite agglomerates and particles.
Journal ArticleDOI
Performance of composites with metakaolin-blended cements
Ľudovít Krajči,S. C. Mojumdar,Ivan Janotka,Francisca Puertas,Marta Palacios,Marta Kuliffayova +5 more
TL;DR: In this article, a comparison of three types of metakaolin sand (fineness below 60μm) with different metakaolinite content (31-40 mass%) is presented.
Journal ArticleDOI
Physio-Chemical Properties, Consolidation, and Stabilization of Tropical Peat Soil Using Traditional Soil Additives — A State of the Art Literature Review
Afnan Ahmad,Muslich Hartadi Sutanto,Mohammed Ali Mohammed Al-Bared,Indra Sati Hamonangan Harahap,Seyed Vahid Alavi Nezhad Khalil Abad,Mudassir Ali Khan +5 more
TL;DR: In this paper, an extensive literature review of the available published data for Atterberg limits, consolidation, and stabilization of peat soil using traditional additives, especially cement and lime, is presented.
References
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Journal Article
Morphology and structure of endellite and halloysite
Journal ArticleDOI
Studies of clay particles with the electron microscope: ii. the fractionation of beidellite, nontronite, magnesium bentonite, and attapülgite
Journal ArticleDOI
Studies of Clay Particles with the Electron Microscope
R. P. Humbert,Byron T. Shaw +1 more
Journal ArticleDOI
The colloid chemistry of the clay mineral attapulgite.
C. E. Marshall,O. G. Caldwell +1 more
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