EP 0725871 A1 19960814 - METAL FIBER WITH OPTIMIZED GEOMETRY FOR REINFORCING CEMENT-BASED MATERIALS
Title (en)
METAL FIBER WITH OPTIMIZED GEOMETRY FOR REINFORCING CEMENT-BASED MATERIALS
Title (de)
METALLFASER MIT OPTIMIERTER GEOMETRIE ZUR VERSTÄRKUNG VON ZEMENTMATERIALEN
Title (fr)
FIBRE METALLIQUE A GEOMETRIE OPTIMISEE POUR RENFORCEMENT DES MATERIAUX A BASE DE CIMENT
Publication
Application
Priority
- CA 9500225 W 19950421
- CA 2131212 A 19940831
Abstract (en)
[origin: WO9606995A1] A metal fiber (10) for reinforcing cement-based materials comprises an elongated, substantially straight central portion (12) and sinusoid shaped end portions (14, 14'). The sinusoid at each end portion (14, 14') has an optimum amplitude Ao,opt defined by: Ao,opt = [k1( sigma c)<k>2] [ sigma u< alpha > epsilon f< beta >] [Af/Pf], where k1 = 2.025 x 10<-2>, sigma c = compressive strength of the cement-based material in MPa, k2 = 3.19 x 10<-1>, sigma u = ultimate tensile strength of the metal in MPa, alpha = 6.60 x 10<-1>, epsilon f = ductility of the metal in percent, and beta = 3.20 x 10<-1>, Af = cross-sectional area of the fiber in mm<2>, and Pf = perimeter of the fiber in mm. The sinusoid further has a wavelength Ls defined by: Ls = (Lf - Lm)/2, where Lf = length of the fiber, Lm = length of the central portion, and wherein 0.5 Lf < Lm < 0.75 Lf. Since the optimum amplitude is defined as a function of the ultimate tensile strength and ductility of the fiber material as well as of the compressive strength of the matrix material, it is possible to tailor the fiber geometry according to the properties of the fiber and matrix materials chosen, and ultimately to the composite toughness desired in an actual structure.
IPC 1-7
IPC 8 full level
E04C 5/01 (2006.01)
CPC (source: EP KR)
E04C 5/01 (2013.01 - KR); E04C 5/012 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9606995 A1 19960307; AT E194198 T1 20000715; AU 2251795 A 19960322; AU 688031 B2 19980305; CA 2131212 C 19961126; DE 69517668 D1 20000803; DE 69517668 T2 20010222; DK 0725871 T3 20001106; EP 0725871 A1 19960814; EP 0725871 B1 20000628; ES 2151059 T3 20001216; KR 100353732 B1 20030124; KR 960706001 A 19961108; MX 192955 B 19990810; MX 9601504 A 19980630
DOCDB simple family (application)
CA 9500225 W 19950421; AT 95915725 T 19950421; AU 2251795 A 19950421; CA 2131212 A 19940831; DE 69517668 T 19950421; DK 95915725 T 19950421; EP 95915725 A 19950421; ES 95915725 T 19950421; KR 19960702073 A 19960423; KR 19967002073 A 19960423; MX 9601504 A 19960422