Fiber bead chain reinforced cement concrete and preparation method thereof

Abstract

The invention discloses fiber bead chain reinforced cement concrete and a preparation method thereof. The fiber bead chain reinforced cement concrete comprises a concrete body, wherein the concrete body is filled with fiber bead chains, the fiber bead chains are composed of continuous fiber and rubber beads, and the rubbed beads are implanted into the continuous fiber. By adopting a fiber bead chain reinforcement mode, existing interface constraint is replaced by structural constraint, the problem of poor interface performance between the fiber and the concrete is solved fundamentally, and the mechanical property of the concrete is greatly improved. By adopting a long fiber reinforcement mode, the mechanical characteristics of the fiber are fully played, the fiber arrangement direction and number are controlled according to the geometrical morphology, operating characteristics and other factors of members, the performance designability is achieved, and the mechanical properties of the concrete are improved. By adopting the casting mode that a reinforcing body is added during casting, the problem of poor manufacturability of fiber concrete during pre-stirring is avoided, and the problem of the material content of a high reinforcing body is solved.

Description

technical field [0001] The invention relates to the field of building material preparation, in particular to a fiber bead chain reinforced cement concrete and a preparation method thereof. Background technique [0002] As we all know, fiber material has super strong mechanical properties, glass fiber has excellent mechanical properties, its tensile strength reaches more than 1000MPa, and it is high in quality and low in price. It is a good composite material reinforcement. Glass fiber is used as a reinforcing material to Reinforced cement concrete should have super strong physical and mechanical properties. However, the current research results and engineering practice have proved that the reinforcement effect of glass fiber on cement concrete is not satisfactory. According to the current novelty search results, glass fiber reinforced cement concrete is currently cast with chopped fiber ready-mixed concrete. When the fiber content is small, the reinforcement effect is not o...

AI Technical Summary

Problems solved by technology

According to the current novelty search results, glass fiber reinforced cement concrete is currently cast with chopped fiber ready-mixed concrete. When the fiber content is small, the reinforcement effect is not obvious, and when the fiber content increases, the concrete’s The workability is obviously reduced, and the performance of concrete does not increase but decreases, resulting in a decrease in the strength of fiber concrete and easy cracking, which is contrary to the composite principle and reinforcement mechanism. Specifically, the following problems generally exist:

[0003] 1. The improvement of mechanical properties is limited. The use of glass fiber to reinforce other substrates, such as epoxy resin, has significantly improved mechanical properties, and the tensile strength has increased from 7MPa to more than 100MPa

However, the mechanical properties of glass fiber reinforced concrete are not significantly enhanced;

[0004] 2. The amount of fiber is limited. Use glass fiber to reinforce other matrices, such as epoxy resin, and the fiber content can be as high as 60%. The currently recognized upper limit of glass fiber and other fibers in concrete is 5%. If you blindly increase the fiber Dosage will lead to a decline in concrete manufacturability, making it difficult to cast or even impossible to cast, and the performance of the cast concrete will also decrease with the increase of fiber dosing;

[0005] 3. The interface between fiber and concrete has poor bonding performance, which makes it difficult for fiber and concrete to work in harmony under the action of high dosage and heavy load. As the dosage increases, interface defects become more and more obvious, resulting in a decrease in overall mechanical properties

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