The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 1978
Filed:
Jul. 13, 1977
Olav Kjohl, Heistad, NO;
Paul Henrik Olstad, Brevik, NO;
Aksjeselskapet NORCEM, Oslo, NO;
Abstract
Concrete having high resistance to corrosion is prepared by using low aluminate (C.sub.3 A) cement, preferably having less than 5 weight per cent of aluminate, and, in addition to conventional concrete constituents, at least 10 weight per cent of finely divided, reactive silica based on the cement weight. A highly corrosion resistant cement composition comprises, in addition to conventional cement constituents, 70 - 90 parts by weight of low aluminate cement and 10 - 30 parts by weight of reactive silica. An additive useful for making concrete highly corrosion resistant comprises 80 - 90 weight per cent of reactive silica, 0 - 10 weight per cent of low aluminate cement, 3 - 8 weight per cent of formaldehyde condensed sodium sulfonate, 3 - 8 weight per cent of lignosulfonate.