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:
Jul. 25, 1995
Filed:
Feb. 18, 1994
Applicant:
Inventors:
Hidenobu Tatematsu, Tokyo, JP;
Tohru Nakamura, Tokyo, JP;
Hitoshi Koshimizu, Tokyo, JP;
Toshihiko Morishita, Osaka, JP;
Hideki Kotaki, Osaka, JP;
Assignees:
Nippon Chemical Industrial Co., Ltd., Tokyo, JP;
Railway Technical Research Institute, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
106813 ; 106 1405 ; 106 1421 ; 106819 ;
Abstract
A cement additive for inhibiting concrete deterioration contains as an effective component a powder mixture of an inorganic cation exchanger, such as a highly calcium-substituted zeolite, and an inorganic anion exchanger, such as hydrocalumite. The cement additive inhibits the alkali-aggregate reaction and the corrosion of reinforcing steel, thereby protecting concrete constructions from deterioration.