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. 24, 2004
Filed:
Nov. 14, 2001
Raymond T. Hemmings, Kennesaw, GA (US);
Russell L. Hill, San Antonio, TX (US);
Bruce J. Cornelius, Waterdown, CA;
Aron McBay, San Antonio, TX (US);
Boral Material Technologies, Inc., San Antonio, TX (US);
Abstract
The present invention is a fly ash filler or filler blend having a particle size distribution with at least three modes that when combined with asphalt produces asphalt composites such as roofing shingles with improved mechanical properties at a lower cost than asphalt shingles produced using conventional calcium carbonate fillers. The present invention also includes a method for producing an asphalt composite, comprising the steps of combining asphalt with a fly ash filler or a filler blend having a particle size distribution with at least three modes and producing an asphalt composite with the resulting filled asphalt. The present invention further includes a method of determining what fly ashes can be used as fillers for asphalt composites such as roofing shingles. The fly ash filler or filler blend can be used in amounts of greater than 45% by volume or greater than 70% by weight to increase the mechanical properties of the asphalt composites such as the pliability, tensile strength and tear strength while decreasing the cost to produce the asphalt composites.