Solidification mechanism of allophane by hydrothermal reaction

Hirotaka Maeda, Yukari Hashimoto, Emile Hideki Ishida

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Solidified materials were prepared by subjecting powder compacts consisting of allophane and slaked lime to hydrothermal reaction at various temperatures. Hydrogarnet was formed after the hydrothermal reaction because of the reaction between allophane and slaked lime. The bending strength of the materials solidified by hydrothermal reaction at 80 °C was greater than 6 MPa. The improvement in the strength of materials by hydrothermal reaction at 80 °C was due to the formation of fine deposits at the surface of allophane aggregates; these deposits filled the spaces between particles of the starting materials. Hydrothermal reaction at temperatures greater than 120 °C resulted in the collapse of the allophane structure, leading to a decrease in the strength of the materials.

Original languageEnglish
Pages (from-to)71-74
Number of pages4
JournalApplied Clay Science
Volume44
Issue number1-2
DOIs
Publication statusPublished - 2009 Apr

Keywords

  • Allophane
  • Composites
  • Hydrothermal reaction
  • Solidification

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

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