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Showing 1 to 20 of 442 for “"clays"”.
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Organo-iron compounds on clays and pillared clays.
(Ferrocenylmethyl)dimethylammonium chloride has been synthesised and the cation intercalated into the montmorillonite Westone-L. Variable temperature Mossbauer spectroscopy indicated that the molecule had a similar Debye temperature in each environment (144 +/- 5 K and 140 +/- 5 K respectively). …
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Electrical Treatment of Clays
… investigation program on electro-osmotic flow in clays was carried out for the present thesis. Short-term steady state electro-osmotic flow tests were performed on specimens of Wyoming bentonite/Ottawa sand mixture. Long-term steady state electro-osmotic flow tests were performed on specimens of …
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Potassium Fixation by Clays
Made available in DSpace on 2014-12-12T00:17:50Z (GMT). No. of bitstreams: 1 7219854.pdf: 5141869 bytes, checksum: 32791078da76d3255a99ab1c31dc2a0b (MD5) Previous issue date: 1972
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Cone penetration in clays.
Thesis. 1978. Sc.D.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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The adsorption of phenolic and organotin compounds by clays and cation exchanged clays
… from ethanol on the surface of the smectite clays at room temperature and under microwave conditions. The adsorbate-adsorbent interactions were weak. Adsorption is accompanied by conversion of bis(tributyltin) oxide to a different tin(IV) species and the release of sodium cations from the …
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Chemical modification of smectite clays
Today, speciality use organoclays are being developed for an increasingly large number of specific applications. Many of these, including use in cosmetics, polishes, greases and paints, require that the material be free from abrasive impurities so that the product retains a smooth `feel'. The …
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Interlamellar modification of smectite clays
… have a wide range of applications. Smectite clays are not true insulators, their slight conductivity has been utilized by the paper industry in the development of mildly conducting paper. In particular, the synthetic hectorite clay, laponite, is employed to produce paper which is used in …
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Wellbore instability mechanisms in clays
… of wellbores drilled in Ko-consolidated clays using non-linear finite element method (FEM) and effective stress soil models to characterize the behavior of clay and unconsolidated shale formations. Two constitutive models are used: Modified Cam Clay (MCC; Roscoe and Burland, 1968), and …
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Swelling behaviour of unsaturated expansive clays
… the swelling behaviour of unsaturated expansive clays:<br/>(i) simplified empirical relationships for rapidly identifying swelling soils and<br/>(ii) a more accurate prediction method suitable for design purposes and based upon experimentally measured swell moduli.<br/>The work was prompted by …
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Saturated–Unsaturated behaviour of compacted clays
… of saturated–unsaturated behavior of compacted clays. For this purpose, a representative clayey soil possessing a moderate water adsorption capacity (liquid limit of 29% and plastic limit of 15%) was characterized to provide baseline geotechnical properties. This material was classified as lean …
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Geotechnical properties of Florida phosphatic clays.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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A study of Bentonite ester clays
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Chemical Engineering, 1947.
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The sticky property of Ypresian clays
… of hydromills. This thesis focuses on Ypresian clays, which are highly adhesive. The adhesive properties of Ypresian clays can slow down excavation processes, causing economic loss to the construction companies. Studying the different mechanisms behind the clogging phenomenon and ways to …
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Pressuremeter testing in miocene stiff clays
… to obtain reliable soil parameters for stiff clays. Laboratory testing results are often scattering due to the fissures and slickensides in these soils. Alternatively, in situ techniques offer a means to test the soils in place. This study focuses on in situ testing in Miocene stiff clays …
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Chemisorption of ammoniacal nitrogen by clays
… employed to evaluate chemisorption of ammonia by clays under moist conditions. In equilibria involving ammonia, all factors favoring volatilization losses of gaseous ammonia would undoubtedly exert an influence on the ultimate equilibria which are reached. Investigation of the relationship between …
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Cretaceous-Tertiary boundary clays in central India
Not Available
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Microfabric changes during the deformation of clays.
An investigation of the fabric of clays was carried out using both the scanning electron microscope and an x- ray di f fractometer. A great deal of effort was devoted to the development o f new and more reliable methods of specimen preparation. Free z e drying and �critical point drying were found …
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The mechanics of plate penetration in clays
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1991.
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Open-ended pile penetration in saturated clays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.
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Stress-strain-strength anisotropy of varved clays.
Thesis. 1977. Sc.D.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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