초록 ▼

Aggregate-containing products bonded by an aluminosilicate hydrogel are disclosed. A system of two-part mixing and blending of binder components with various granular-like aggregates, modifiers and/or fillers is described in which the resulting compositions are temporarily fluid and formable for sho

Aggregate-containing products bonded by an aluminosilicate hydrogel are disclosed. A system of two-part mixing and blending of binder components with various granular-like aggregates, modifiers and/or fillers is described in which the resulting compositions are temporarily fluid and formable for short, controllable periods of time but which thereafter become strong, rigid, adherent, erosion resistant composites, requiring little or no external heat supply to achieve full set. The compositions can be formulated for molding on suitable forms or patterns, and may also be prepared in slurry form suitable for spray coating or sealing applications. A wide variety of products can be manufactured of the compositions, including investment molds and cores for foundry use, as well as non-foundry products such as heat and electrical insulators, construction blocks, panels, coating slurries, etc. which may be of essentially solid or foamed (cellular) construction. The novel compositions may be totally inorganic if desired and have advantage in their preparation and use of being non-toxic and environmentally safe, possessing properties of good soundproofing, fire and fluid erosion resistance. The compositions are formulated of readily available, non-critical materials and are correspondingly very cost effective.

대표청구항 ▼

Rigidified formed articles of aggregate/binder compositions which are at least sufficiently fluid or plastic when prepared to enable them to be formed into said article and which are self-setting under ambient conditions to effect rigidification thereof, said composition comprising an inert aggregat

Rigidified formed articles of aggregate/binder compositions which are at least sufficiently fluid or plastic when prepared to enable them to be formed into said article and which are self-setting under ambient conditions to effect rigidification thereof, said composition comprising an inert aggregate material, more than 10% by weight of an aluminosilicate hydrogel binder bonding said aggregate material together to form said rigidified article, and at least one gel modifying filler selected from the group consisting of clays, compounds of Group II and III metals of the Period Table of Elements and zinc, zirconium and titanium compounds which form insoluble alkali salts with said binder, said aggregate material principally comprising discrete particulate matter which when bound together in said rigidified condition constitutes the skeletal base of said articles, said aluminosilicate hydrogel binder having compositional limits, exclusive of its water content, of from 10-60 weight percent total alkali, 10-70 weight percent alumina and 10-80 weight percent silica, wherein the mole ratio of alumina-to-silica is from 0.07 to about 4.20, a total solids content of said binder of 10-50 weight percent, the balance essentially water.