Anti disruptive self-dense concrete of mixed fiber under high temperature of fire

Abstract

This invention relates to high-performance and anti-crack self-tight fiber-containing concrete used for tunnels, architectures and bridges. The self-tight concrete has good anti-crack property, and can improve the mechanical properties and deformation properties deformation properties of the structures when subjected to fire or high temperatures. This invention uses high-strength and high-modulus steel fiber and low-melting-point synthetic fiber as the additives, which are combined with high-efficiency water-reducer to prepare the self-tight concrete. The self-tight concrete has such advantages as low cost, high safety, no crack at high temperatures, high residual compressive strength and bending strength after fire or high temperatures, and no smashing during construction.

Description

technical field [0001] The invention belongs to the technical field of concrete in civil engineering, and can be widely used in tunnels and underground works, buildings or bridges with fire protection requirements, and is used to resist bursting of concrete structures when the structure is subjected to fire or high temperature. Configuration and application of hybrid fiber self-compacting concrete with workability, high strength, high toughness, and excellent burst resistance. Background technique [0002] Fire is one of the potential hazards causing structural damage such as buildings, bridges, tunnels and underground works. Concrete is a non-combustible building material. However, once a fire occurs, severe bursting will occur, that is, spalling and pits will appear in different degrees on the concrete surface, which will directly lead to the reduction or even failure of the safety performance of the structure, resulting in huge losses of life and property. At present, s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of concrete composite material with excellent working performance, high strength, high toughness and no bursting in case of fire or high temperature, to solve the problem of poor bursting resistance of ordinary concrete, and it has the advantages of no need for vibration during construction. It can be self-leveled by its own gravity to achieve a compact effect; at the same time, it will not burst when it is subjected to fire or high temperature, which improves the safety reserve of the structure and provides a certain safety guarantee for fire and after-fire rescue.

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