Showing papers in "Applied Clay Science in 1996"

TL;DR: In this article, the swell shrinkage behavior of clays was investigated in four soils of different plasticity cyclic swelling and two shrinkage schemes were adopted, partial and full shrinkage.

TL;DR: In this paper, fly ash was fused with NaOH medium coal and an endothermic reaction at 170-180°C occurred, resulting in formation of an unreported Na aluminosilicate with approximate composition Na15Si4Al3020 and major XIRD reflections at 4.793, 3.828, 4.854, 2.578, and 2.524 A.

TL;DR: In this article, the lattice vibrations of a series of dioctahedral montmorillonitic clay minerals were studied using FT Raman spectroscopy and X-ray diffraction.

TL;DR: In this paper, the use of clays in the formulation of a ceramic body that could incorporate steel dust and met environmental regulations was tested and a prototype of commercial brick incorporating 20% steel dust was produced.

TL;DR: In this paper, the effect of overburden pressure, excavation and desaturation on the soil fabric was studied and it was shown that the nature of soil fabric is dependent on both the applied mechanical and hydraulic stress state conditions.

TL;DR: A natural zeolitic material composed of microscale intergrowths of the low-silica zeolites natrolite and thomsonite (NAT/THO) was found to be more reactive in distilled water compared to the high-silecitic materials heulandite and stilbite as discussed by the authors.

TL;DR: In this paper, the effects of structural Fe oxidation states on the physicochemical properties of smectite clay minerals were investigated and it was shown that free radicals may be responsible for the greatest levels of reductive potential, which provides an important attribute by which potential reducing agents can be screened.

TL;DR: In this article, preliminary results on the fixation of Zn 2+ and Pb 2+ by a purified Wyoming Ca-montmorillonite, in different experimental conditions, were presented.

TL;DR: In this article, both untreated and calcined Na-and Ca-montmorillonite-cement mortars were studied with XRD, SEM, EPMA and for chemical solubility.

TL;DR: In this article, the authors established the possible industrial applications of Griva kaolin from the alteration of gabbroic rocks from the Griva area, Macedonia, Greece, where the kaolin is composed mainly of vermiculite and plagioclases, and traces of quartz, amphiboles, halloysite and smectites.

TL;DR: In this article, the authors describe the mineralogical and ceramic characteristics of three Ordovician shales from the Ciudad Real province (Central Spain), which are mainly composed of phyllosilicates (> 85%), quartz, K-feldspar, and hematite.

TL;DR: In this article, the interaction between sepiolite and Zn2+ and Pb2+ aqueous solutions has been studied in order to verify the heavy-metal cation sorption-desorption rates.

TL;DR: In this paper, a cation exchange of different bentonites with hydrothermally treated (130-160°C for 16-136 h) solutions containing mixtures of aluminiumchlorohydrate (ACH) and REE (Ce and La)-salts is described.

TL;DR: In this article, the analysis of the behavior of consolidated synthetic model clay Na-laponite is presented, based on data given by different techniques: BET, mercury intrusion, X-ray diffraction and thermogravimetric analysis.

TL;DR: In this paper, samples of standard sepiolite were calcined at 370, 570 and 830°C corresponding to the various stages of thermal reaction detected by DTA and TG Both raw and calcined samples, before and after being mixed with Ca(OH) 2 in the presence of simulated cement pore solution, were studied with XRD, SEM, EPMA and chemical solubility.

TL;DR: In this article, the triple layer electrochemical adsorption model (TIM) was used to model the adaption of Cs+ onto Ca-montmorillonite.

TL;DR: In this article, the effects of FeCl3 and CUS04 on the performance of acid-activated clays in bleaching of palm of oil have been examined, and the effect of the additive on acid activated clays depend on the type and amount of additive.

TL;DR: In this article, 1,1′-Binaphthol was resolved chromatographically on a column packed with Λ-[Ru(phen)3]2+ and Λ]-Ru(bpy)3]-2+ laponite columns when the compound was eluted with methanol solvent.

TL;DR: In this article, the general topic of applying clay minerals to chemical sensors is discussed using two different approaches: the modular components of sensor systems are introduced and the use of prior specific interactions between clay minerals and, respectively, gas and liquids, for a sensor response are discussed.

TL;DR: In this article, the authors investigated the efficiency of five Turkish bentonites (Samas, Canbensan, Karakaya-Resadiye,Karakaya Resadiye (Kara-Cankiri), a sepiolite, a diatomite and dioctade-cyldimetlhyl ammonium chloride (Quartamin D86) at removing color and turbidity from sugar beet juice.

TL;DR: In this article, a mixture of EPDM and non-conjugated diene terpolymer (Nterpolymer) was used to prevent bleeding and blooming of additives.

TL;DR: In this article, three Turkish bentonites (Samas, Canbensan and Ceylan) were tested for their potential use in drilling fluids, and the results showed that they were significantly improved with some additives such as salts (Na2C03, Na2SO4, Al2(SO4)3), gypsum, high molecular weight polymers, polyacrylamide and polyacrylic).

TL;DR: The gelation process of industrial organo-bentone in organic solvents is a complex phenomenon due to various parameters, such as, the crystallographic nature of the clay, the nature of adsorbed surfactant, the dielectric constant of medium.

TL;DR: In this paper, a pillar density number (PDN) based on the ratio of interlayer Al adsorbed to CEC of the parent clay has been effectively used to evaluate the nature of the resulting pillared product.

TL;DR: In this article, the authors examined the permeability and diffusivity of compacted bentonite plugs that were either slotted, to mimic fractures, parallel to the direction of mass flow or heated at 150 and 250°C for several weeks at various moisture contents before testing.

TL;DR: In this article, two different MoO3 catalysts (30 wt%) supported on montmorillonite type pillared clays have been synthesized by impregnation with an ammonium molybdate solution (sample Mo-APC-i) and mechanical mixing with MoO 3 (sample MOC-m).

TL;DR: In this article, the mineralogy and occurrence of an Iranian clay size deposit, locally called "Gel-E-Sarshour" or shampoo-clay, was studied.

TL;DR: In this article, the fabrication, properties and composition of heated phosphate-bonded clay bricks are reported and the strength of these bricks is related to the equilibrium pH of the clay mix.

TL;DR: In this article, carbonitriding reactions of three bentonites were studied in the range 1320-1480°C using carbon black as reducing agent in a N 2 atmosphere.

TL;DR: In this paper, a statistical approach was used to show relationships between physical and chemical properties of Nigerian kaolinites and the American kaolinite, and a strong correlation between charge density and potassium was ascribed to the presence of muscovite in Kankara and Niger kaolinite.