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Clays and Clay Minerals

, Volume 21, Issue 4, pp 219–227 | Cite as

Electrochemical Modifications in Kaolinite-Glass Bead Plugs

Mineralogical and Physico-Chemical Modifications
  • A. J. Sethi
  • A. J. Herbillon
  • J. J. Fripiat
Article

Abstract

Electrochemical treatment of kaolinite-glass bead plugs in the presence of water and CaCl2 solutions produces dissolution of the glass beads, corrosion of the anodes, and transport of the released elements toward the cathodic zone. In this area, new mineral phases (both amorphous and crystalline) are synthesized. Most of these new phases, and especially the calcium silicate hydrate (CSH-1), are well known to exhibit important cementing properties. The nature and the extent of the modifications brought about by the treatment are dependent on the nature of the electrodes, the pH and the ionic strength of the circulating electrolyte, and the duration of the treatment.

Résumé

Le traitement électrochimique de blocs comprimés de kaolinite et de billes de verre en présence d’eau et de solution de CaCl2, entraîne une dissolution des billes de verre, une corrosion des anodes et le transport des éléments libérés vers la zone cathodique. Dans cette zone, des phases minérales nouvelles (amorphes et cristallisées) sont synthétisées. La plupart de ces phases nouvelles, et notamment le silicate de calcium hydraté (CSH-1) sont bien connues pour leurs propriétés de ciment.

La nature et l’intensité des modifications apportées par le traitement dépendent de la nature des électrodes, du pH et de la force ionique de l’électrolyte circulant et de la durée du traitement.

Kurzreferat

Die elektrochemische Behandlung von KaolinitGlasperlen-Preßlingen in Gegenwart von Wasser und CaCl2-Lösungen ruft Lösung der Glasperlen, Korrosion der Anoden und den Transport der freigesetzten Elemente in Richtung auf die Kathodenzone hervor. In diesem Bereich werden neue Mineralphasen (sowohl amorphe als auch kristalline) gebildet. Die meisten dieser neuen Phasen und besonders das Caclium-silikathydrat (CSH-1) weisen bekanntlich wichtige zementierende Eigenschaften auf.

Die Natur und das Ausmaß der durch die Behandlung hervorgerufenen Umwandlungen hängt von der Art der Elektroden, dem pH-Wert und der Ionenstärke der umlaufenden Elektrolytlösung, sowie von der Dauer der Behandlung ab.

Резюме

Электрохимическая обработка каолинита и «пуговок» бисеров стекла в растворе воды и СаС12 повела к растворению бисеров стекла, к коррозии анодов, и к переносу освобожденных элементов в катодную зону. В этой сфере исследования синтезируются новые фации минералов (как аморфных, так и кристаллических). Большинство этих новых фаций, особенно гидроокись силиката кальция (СSН-1), как хорошо известно, проявляют склеивающую способность. Характер и степень изменений возникающих вследствие обработки зависят от свойств электродов, от рН, от ионной силы кругового движения электролита и от продолжительности обработки.

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Copyright information

© Clay Minerals Society 1973

Authors and Affiliations

  • A. J. Sethi
    • 1
  • A. J. Herbillon
    • 1
  • J. J. Fripiat
    • 1
  1. 1.Laboratoire de Physico-Chimie MinéraleHeverleeBelgium

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