Concrete reinforcing fiber

E - Fixed Constructions – 04 – C

Patent

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Details

E04C 5/03 (2006.01) C04B 14/38 (2006.01) E04C 5/01 (2006.01) E04C 5/07 (2006.01)

Patent

CA 2294123

An improved reinforcing fiber for concrete is formed with two types of anchors positioned adjacent to each axial end of the fiber. A drag anchor which frictionally resists being pulled from the concrete without fiber breakage and a dead anchor between the drag anchor and adjacent axial end of the fiber, the dead end engages the concrete to develop stresses at a weakened point in the fiber formed between the drag anchor and its adjacent dead anchor to break the fiber or deform the dead anchor before maximum tensile strength of the fiber is reached so that the dead anchor functions to maximize the load carrying capacity while at the same time protecting against fiber rupture and the drag anchor continues to function after release of the weak point of the fiber.

L'invention traite d'une fibre à armer du béton perfectionnée et constituée de deux types d'éléments d'ancrage adjacents à chaque extrémité axiale de la fibre. Un élément d'ancrage de friction résiste par la voie de la friction à l'extraction du béton sans que la fibre ne se casse. Un élément d'ancrage mort est situé entre l'élément d'ancrage de friction et l'extrémité axiale adjacente de la fibre. Cet élément se fixe dans le béton dans le but de développer les contraintes au niveau d'un point d'affaiblissement de la fibre, formé entre l'élément d'ancrage de friction et l'élément d'ancrage mort qui lui est adjacent, en vue de casser la fibre ou de déformer l'élément d'ancrage mort avant que la force de tension maximale de la fibre ne soit atteinte et ce, de manière que l'élément d'ancrage mort assure une maximisation de la capacité de charge tout en protégeant contre la rupture de la fibre. L'élément d'ancrage continue à assurer sa fonction après rupture du point d'affaiblissement de la fibre.

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