Center for cement composite materials. Final report, 29 October 1986-30 November 1989
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.
- Research Organization:
- Illinois Univ., Urbana, IL (USA). Dept. of Civil Engineering
- OSTI ID:
- 6753068
- Report Number(s):
- AD-A-219838/0/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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