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:
Sep. 25, 1979
Filed:
Feb. 09, 1978
James A Ray, Mantua, OH (US);
Martin Marietta Corporation, Bethesda, MD (US);
Abstract
Improved hydraulic cement mixes are made by incorporating into such mixes an admixture comprising at least one acetic acid ester of a glycol in an amount sufficient to increase the compressive strength of products made from such mixes. In portland-type cement mixes, these admixtures also act as set accelerators. In high-alumina cement mixes, the admixtures not only increase strength but also inhibit the spontaneous loss of strength which is generally characteristic of high-alumina cements. A preferred admixture is ethylene glycol diacetate in an amount of up to about 3.0% by weight based upon the weight of the cement, preferably in an amount of between about 0.01% and 2.0% by weight.