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:
Feb. 09, 2010
Filed:
Oct. 25, 2006
Tricia Guevara, Koppel, PA (US);
Michael T. Williams, Beaver Falls, PA (US);
Rick Hughes, Beaver, PA (US);
Michael R. Kelley, Butler, PA (US);
John K. Madish, Negley, OH (US);
Kristen Van Buskirk, Aliquippa, PA (US);
Tricia Guevara, Koppel, PA (US);
Michael T. Williams, Beaver Falls, PA (US);
Rick Hughes, Beaver, PA (US);
Michael R. Kelley, Butler, PA (US);
John K. Madish, Negley, OH (US);
Kristen Van Buskirk, Aliquippa, PA (US);
NOVA Chemicals Inc., Moon Township, PA (US);
Abstract
A lightweight ready-mix concrete composition that contains 8-20 volume percent cement, 11-50 volume percent sand, 10-31 volume percent prepuff particles, 9-40 volume percent coarse aggregate, and 10-22 volume percent water, where the sum of components used does not exceed 100 volume percent. The prepuff particles have an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.02 g/cc to 0.64 g/cc, an aspect ratio of from 1 to 3. The slump value of the composition measured according to ASTM C 143 is from 2 to 8 inches. After the lightweight ready-mix concrete composition is set for 28 days, it has a compressive strength of at least 1400 psi as tested according to ASTM C39.