Methods of making refractory bodies

US5885510A · kind A · utility

Assignee

• Alcoa Chemie GmbH · DE

Inventors

• Gangolf Kriechbaum · Alzenau, DE
• Volker Gnauck · Mudau, DE

Key dates

• Filing date: Feb 7, 1997
• Grant date: Mar 23, 1999
• Expiry date: Feb 7, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B40/0028
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for manufacturing a reinforced cementitious columnar structure comprising: (a) providing a mold having a cavity which corresponds to a shape and size of the columnar structure; (b) filling the cavity with dry coarse particulates to form a formed dry body comprising 50-90 volume percent coarse particulates having a particle size between about 1 and 60 mm so as to form a core volume; (c) introducing a slurry of cementitious material containing an amount of fine material which has been determined beforehand, the fine material having a particle size smaller than the size of interstitial voids of the coarse particulates into the core volume, the fine material and the cementitious material filling the core volume and the cementitious material infiltirating and encapsulating the coarse particulates, and the fine material remaining within the core volume; (d) curing the slurry of cementitious material to form the reinforced cementitious columnar structure; and (e) separating the mold from the reinforced cementitious columnar structure.