Characterization of Several Plasters and One Retarder for Repository Sealing Mixtures.

Abstract

Samples of plasters (i.e., calcium sulfate hemihydrate, CaSO4.1/2H20) from six sources and one plaster retarder from a different source were obtained and characterized by a combination of chemical and physical testing and by petrographic examination. The petrographic examination included X-ray diffraction, optical microscopy, differential thermal analysis, and scanning electron microscopy procedures. The intent of this work was twofold. One purpose was to determine if plaster per se could be used as an ingredient for cementitious mixtures intended for repository sealing applications, Previous experience had been with use of a proprietary admixture that contained plaster. The second purpose was to determine one or more methods of distinguishing between the alpha and beta forms of calcium sulfate hemihydrate. Keywords: nuclear wastes; plaster of paris; tables(data).

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1985
Accession Number
ADA160595

Entities

People

  • A. D. Buck
  • J. P. Burkes
  • R. E. Reinhold

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Calcium
  • Calcium Compounds
  • Classification
  • Crystal Structure
  • Diffraction
  • Electron Microscopes
  • Electron Microscopy
  • Elements
  • Materials
  • Measurement
  • Microscopes
  • Microscopy
  • Particle Size
  • Particles
  • Storage
  • Waterways
  • X Rays

Readers

  • Materials Science and Engineering.
  • Naval Personnel Management
  • Rocket Propulsion.

Technology Areas

  • Microelectronics