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:
Aug. 26, 2014
Filed:
Oct. 17, 2011
Arthur Kyriazis, Melbourne, AU;
Bruce Perry, Reedy Creek, AU;
Eric Koehler, Boston, MA (US);
Leon Bablouzian, Framingham, MA (US);
Arthur Kyriazis, Melbourne, AU;
Bruce Perry, Reedy Creek, AU;
Eric Koehler, Boston, MA (US);
Leon Bablouzian, Framingham, MA (US);
W. R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
The present invention provides a method for making sand compositions wherein manufactured sand particles are pretreated with a clay-mitigating polycation and blended with natural sand particles that have washed to remove fines such that at least 90% of the natural sand particles are retained on a 75 micron sieve. Methods of the invention also involve the use of the blended pretreated sand for making concrete wherein the sand is combined with cement, a polycarboxylate type dispersant, a further amount of clay-mitigating polycation compound, and at least one hydryoxyl or hydroxyl carboxylic acid or salt compound.