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Title: Magnesium-phosphate-glass cements with ceramic-type properties

Abstract

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.

Inventors:
;
Publication Date:
OSTI Identifier:
5827653
Application Number:
ON: DE83018059
Assignee:
ERA-08-054284; EDB-83-177671
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CEMENTS; CONCRETES; REPAIR; BORAX; COMPRESSION STRENGTH; CURING; GLASS; HYDRATES; MAGNESIUM PHOSPHATES; MECHANICAL STRUCTURES; POROSITY; POWDERS; ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; BORATES; BORON COMPOUNDS; BUILDING MATERIALS; MAGNESIUM COMPOUNDS; MATERIALS; MECHANICAL PROPERTIES; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; SODIUM COMPOUNDS; 360601* - Other Materials- Preparation & Manufacture

Citation Formats

Sugama, T., and Kukacka, L.E. Magnesium-phosphate-glass cements with ceramic-type properties. United States: N. p., 1982. Web.
Sugama, T., & Kukacka, L.E. Magnesium-phosphate-glass cements with ceramic-type properties. United States.
Sugama, T., and Kukacka, L.E. Thu . "Magnesium-phosphate-glass cements with ceramic-type properties". United States.
@article{osti_5827653,
title = {Magnesium-phosphate-glass cements with ceramic-type properties},
author = {Sugama, T. and Kukacka, L.E.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {9}
}