Magnesium-phosphate-glass cements with ceramic-type properties
Rapid setting magnesium phosphate (Mg glass) cementitious materials consisting of magnesium phosphate cement paste, polyborax and water-saturated aggregate, exhibits rapid setting and high early strength characteristics. The magnesium glass cement is prepared from a cation-leachable powder and a bivalent metallic ion-accepting liquid such as an aqueous solution of diammonium phosphate and ammonium polyphosphate. The cation-leachable powder includes a mixture of two different magnesium oxide powders processed and sized differently which when mixed with the bivalent metallic ion-accepting liquid provides the magnesium glass cement consisting primarily of magnesium ortho phosphate tetrahydrate, with magnesium hydroxide and magnesium ammonium phosphate hexahydrate also present. The polyborax serves as a set-retarder. The resulting magnesium mono- and polyphosphate cements are particularly suitable for use as a cementing matrix in rapid repair systems for deteriorated concrete structures as well as construction materials and surface coatings for fireproof structures.
- DOE Contract Number:
- AC02-76CH00016
- Assignee:
- ERA-08-054284; EDB-83-177671
- Patent Number(s):
- None
- Application Number:
- ON: DE83018059
- OSTI ID:
- 5827653
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360601* -- Other Materials-- Preparation & Manufacture
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BORATES
BORAX
BORON COMPOUNDS
BUILDING MATERIALS
CEMENTS
COMPRESSION STRENGTH
CONCRETES
CURING
GLASS
HYDRATES
MAGNESIUM COMPOUNDS
MAGNESIUM PHOSPHATES
MATERIALS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
POROSITY
POWDERS
REPAIR
SODIUM COMPOUNDS