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. 04, 1998
Filed:
Mar. 04, 1996
Victor C Li, Ann Arbor, MI (US);
Hwai-Chung Wu, Ann Arbor, MI (US);
The Regents of the University of, Ann Arbor, MI (US);
Abstract
The present invention relates to processes for enhancing the bond strength of a cement matrix including reinforcement fibers and for modifying the surface characteristics of reinforcement fibers useful in cementitious materials. The processes further relate to controlling the interface properties and, more particularly, the bond strength (.tau.) and interface toughness (T.sub.i), between synthetic fibers and a cementitious material forming a matrix. By plasma treating synthetic fibers with an excitable gas capable of displacing hydrogen atoms occurring along said reinforcement fibers, the bond strength and interface toughness of the composite is dramatically increased over composites employing non-plasma treated fibers.