Center for cement composite materials. Final report, 29 October 1986-30 November 1989
Abstract
The Center has produced very strong MDF cements and has made significant progress in enhancing the water resistance of the material. The important factors in controlling water sensitivity have now been identified and studies are in progress to quantify their influences. Cement hydration has been followed by a novel in-situ technique involving nuclear magnetic resonance. Fiber-matrix interactions in MDF laminates were also studied. Characterization of DSP pastes have shown that the matrix is microporous; mesopores are absent unless the material is allowed to dry out. This results in water adsorption at low relative humidities, which adversely impacts on electrical properties. DSP plates are a good insulating, low dielectric material as long as it is kept dry. Hydration under autoclaving conditions may be a way of solving the problem and hydration chemistry at various temperatures have been studied. The Center has also studied a magnesium triphosphate cement, as a precursor to polyphosphate cements and is exploring inorganic-polymer composites at the molecular levels. Finally the Center has investigated the influence of packing and particle interactions on the rheology of suspensions with high solids contents. The Center also established and maintains a facility for the characterization of powders and porous materials.
- Authors:
- Publication Date:
- Research Org.:
- Illinois Univ., Urbana, IL (USA). Dept. of Civil Engineering
- OSTI Identifier:
- 6753068
- Report Number(s):
- AD-A-219838/0/XAB
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CEMENTS; RESEARCH PROGRAMS; ADSORPTION; AUTOCLAVES; CHEMISTRY; COMPOSITE MATERIALS; DIELECTRIC MATERIALS; FIBERS; HUMIDITY; HYDRATION; INTERACTIONS; MAGNESIUM COMPOUNDS; MATRIX MATERIALS; MOLECULES; NUCLEAR MAGNETIC RESONANCE; PACKAGING; PARTICLES; PHOSPHATES; POROUS MATERIALS; POWDERS; PROGRESS REPORT; RHEOLOGY; SENSITIVITY; SOLIDS; SORPTIVE PROPERTIES; WATER; ALKALINE EARTH METAL COMPOUNDS; BUILDING MATERIALS; DOCUMENT TYPES; HYDROGEN COMPOUNDS; MAGNETIC RESONANCE; MATERIALS; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; RESONANCE; SOLVATION; SORPTION; SURFACE PROPERTIES; 360603* - Materials- Properties
Citation Formats
Young, J F. Center for cement composite materials. Final report, 29 October 1986-30 November 1989. United States: N. p., 1990.
Web.
Young, J F. Center for cement composite materials. Final report, 29 October 1986-30 November 1989. United States.
Young, J F. 1990.
"Center for cement composite materials. Final report, 29 October 1986-30 November 1989". United States.
@article{osti_6753068,
title = {Center for cement composite materials. Final report, 29 October 1986-30 November 1989},
author = {Young, J F},
abstractNote = {The Center has produced very strong MDF cements and has made significant progress in enhancing the water resistance of the material. The important factors in controlling water sensitivity have now been identified and studies are in progress to quantify their influences. Cement hydration has been followed by a novel in-situ technique involving nuclear magnetic resonance. Fiber-matrix interactions in MDF laminates were also studied. Characterization of DSP pastes have shown that the matrix is microporous; mesopores are absent unless the material is allowed to dry out. This results in water adsorption at low relative humidities, which adversely impacts on electrical properties. DSP plates are a good insulating, low dielectric material as long as it is kept dry. Hydration under autoclaving conditions may be a way of solving the problem and hydration chemistry at various temperatures have been studied. The Center has also studied a magnesium triphosphate cement, as a precursor to polyphosphate cements and is exploring inorganic-polymer composites at the molecular levels. Finally the Center has investigated the influence of packing and particle interactions on the rheology of suspensions with high solids contents. The Center also established and maintains a facility for the characterization of powders and porous materials.},
doi = {},
url = {https://www.osti.gov/biblio/6753068},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}