Patent ID: 6340522
Filing Date: 2002-01-22
Classification: E04C,Y10T

Abstract:
Fibers for reinforcing concrete, comprising: a plurality of fibers having an average length of 5-100 mm, an average width of 0.25-8.0 mm, an average thickness of 0.005-3.0 mm, and first and second opposed ends defining an intermediate portion therebetween having a three-dimensional twist, the three-dimensional twist substantially following a curve described by an equation (xyz)=(a&CenterDot;cos&af;(Ï‰1&CenterDot;Ï„)b&CenterDot;sin&af;(Ï‰2&CenterDot;Ï„)v&CenterDot;Ï„)wherein a, b, &ohgr;1,&ohgr;2, v and &tgr; are real numbers, and wherein a and b are bounded by 0.25 mm&lE;a, b&lE;25 mm.