Process for increasing the mechanical strength of porous...

Details Process for increasing the mechanical strength of porous... Process for increasing the mechanical strength of porous...

C - Chemistry, Metallurgy

04

B

25/105

C04B 41/00 (2006.01) C04B 22/02 (2006.01) E01C 7/14 (2006.01) E01C 7/35 (2006.01)

Patent

CA 1047742

ABSTRACT OF THE DISCLOSURE A process for making articles having increased mechan- ical strength properties, such as bridges, buildings, roads, etc. of concrete, in which the raw material, from which the article is molded, is mixed with particulate sulphur. After molding and setting, the article is heated to a temperature below the melting point of sulphur and held at that tempera- ture until substantially all free water has been removed from the article. Following the desiccation the article is heated to a higher temperature at which the sulphur melts and migrates into internal cavities in the article. Finally, the article is cooled so that the sulphur solidifies and fills up said internal cavities. The process may also be used for making articles of clay at temperatures below the normally employed firing temperature.

223421

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