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 exhibiting 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.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4436555
- OSTI ID:
- 6566313
- Resource Relation:
- Patent File Date: Filed date 23 Sep 1982; Other Information: PAT-APPL-422510
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CEMENTS
CHEMICAL PREPARATION
MAGNESIUM PHOSPHATES
PHOSPHATE GLASS
AQUEOUS SOLUTIONS
BORAX
BUILDING MATERIALS
MAGNESIUM OXIDES
MIXING
POWDERS
SURFACE COATING
WATER SATURATION
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BORATES
BORON COMPOUNDS
CHALCOGENIDES
DEPOSITION
DISPERSIONS
GLASS
MAGNESIUM COMPOUNDS
MATERIALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SATURATION
SODIUM COMPOUNDS
SOLUTIONS
SYNTHESIS
360601* - Other Materials- Preparation & Manufacture