Preparation method and device of hybrid oriented fiber concrete

Abstract

The invention relates to a preparation method and device of hybrid oriented fiber concrete, and belongs to the technical field of fiber reinforced concrete materials. According to the preparation method, cement, coarse aggregate, fine aggregate, a water reducing agent, water, magnetisable fibers and non-magnetisable fibers are adopted as raw materials for preparation; the cement and the magnetisable fibers are added into the coarse aggregate to be mixed into a first mixture, and the fine aggregate and the non-magnetisable fibers are added into the first mixture to obtain a second mixture; and vibrating through a vibrating device capable of generating a magnetic field, so that the magnetisable fibers are rotated and oriented, and the hybrid oriented fiber concrete is obtained. According to the preparation method of the hybrid oriented fiber concrete provided by the invention, the magnetisable fibers and the non-magnetized polymer fibers are doped into the concrete according to a certain proportion, and the hybrid oriented fiber concrete is formed under the action of a magnetic field. The magnetisable fibers with high elastic modulus and the non-magnetisable fibers with good ductility play positive roles in toughening, cracking resistance and strength improvement of the concrete.

Description

technical field [0001] The invention relates to a preparation method and a device of hybrid oriented fiber concrete, and belongs to the technical field of fiber reinforced concrete materials. Background technique [0002] Adding an appropriate amount of fibers with high elastic modulus and good ductility into concrete plays a positive role in enhancing the strength of concrete and improving the toughness and crack resistance of concrete. Ultimate bearing capacity, strain capacity and strain hardening properties. In improving the strength of concrete, metal fibers are usually the main components; in improving the toughness, ductility and crack resistance of concrete, non-metallic polymer fibers are usually the main components. The stress direction of concrete members is clear, and only a small part of fiber reinforced concrete with random distribution is in the same direction as the tensile stress, and at the same time plays a reinforcing role, while most of the fibers can...

AI Technical Summary

Problems solved by technology

The stress direction of the concrete member is clear, only a small part of the randomly distributed fiber concrete is in the same direction as the tensile stress, and at the same time exerts a reinforcing effect, while most of the fibers cannot fully exert their reinforcing effect, resulting in waste of fibers and increased costs

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