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Title: The effect of Ca(OH)/sub 2/-treated ceramic microspheres on the mechanical properties of high-temperature lightweight cement composites

Abstract

The compressive strength and water permeability of high-temperature lightweight cementing materials containing sillimanite-based hollow microspheres as a filler can be improved by treating the surfaces of the microspheres with a Ca(OH)/sub 2/-saturated solution at temperatures up to 200/sup 0/C. The precipitation of an epitaxial layer formed by an interaction between a hot calcium hydroxide solution and the surface of the sphere plays an essential role in developing favorable bonding characteristics at the interfaces and in promoting the hydration of the cement matrix. It was observed that tobermorite-truscottite transformation and anorthite formation during autoclave exposure for 180 days in brine at 300/sup 0/C results in slight strength reductions and increased water permeability. 7 refs., 2 figs., 3 tabs.

Authors:
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (USA)
OSTI Identifier:
5554939
Report Number(s):
BNL-40419; CONF-871250-1
ON: DE88004590
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Conference
Resource Relation:
Conference: Symposium on interfaces in cementitious composites, Boston, MA, USA, 2 Dec 1987; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CALCIUM HYDROXIDES; CHEMICAL PROPERTIES; CHEMICAL REACTIONS; CEMENTS; COMPRESSION STRENGTH; MECHANICAL PROPERTIES; PERMEABILITY; COMPOSITE MATERIALS; MICROSPHERES; SURFACE TREATMENTS; ALUMINIUM COMPOUNDS; CERAMICS; CHEMICAL BONDS; DENSITY; EPITAXY; HYDRATION; PRECIPITATION; SILICON OXIDES; SLURRIES; WATER; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; BUILDING MATERIALS; CALCIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; HYDROGEN COMPOUNDS; HYDROXIDES; MATERIALS; MIXTURES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SEPARATION PROCESSES; SILICON COMPOUNDS; SOLVATION; SUSPENSIONS; 360603* - Materials- Properties; 400201 - Chemical & Physicochemical Properties

Citation Formats

Sugama, Toshifumi. The effect of Ca(OH)/sub 2/-treated ceramic microspheres on the mechanical properties of high-temperature lightweight cement composites. United States: N. p., 1987. Web.
Sugama, Toshifumi. The effect of Ca(OH)/sub 2/-treated ceramic microspheres on the mechanical properties of high-temperature lightweight cement composites. United States.
Sugama, Toshifumi. 1987. "The effect of Ca(OH)/sub 2/-treated ceramic microspheres on the mechanical properties of high-temperature lightweight cement composites". United States.
@article{osti_5554939,
title = {The effect of Ca(OH)/sub 2/-treated ceramic microspheres on the mechanical properties of high-temperature lightweight cement composites},
author = {Sugama, Toshifumi},
abstractNote = {The compressive strength and water permeability of high-temperature lightweight cementing materials containing sillimanite-based hollow microspheres as a filler can be improved by treating the surfaces of the microspheres with a Ca(OH)/sub 2/-saturated solution at temperatures up to 200/sup 0/C. The precipitation of an epitaxial layer formed by an interaction between a hot calcium hydroxide solution and the surface of the sphere plays an essential role in developing favorable bonding characteristics at the interfaces and in promoting the hydration of the cement matrix. It was observed that tobermorite-truscottite transformation and anorthite formation during autoclave exposure for 180 days in brine at 300/sup 0/C results in slight strength reductions and increased water permeability. 7 refs., 2 figs., 3 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/5554939}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {10}
}

Conference:
Other availability
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