Carbon fiber and glass fiber mixed type plane grating rib

Abstract

The invention relates to the technical field of reinforcing materials of concrete structures and in particular relates to a carbon fiber and glass fiber mixed type plane grating rib comprising three carbon fiber bundle layers, wherein alkali-free glass fiber bundle layers are arranged among the three carbon fiber bundle layers. The carbon fiber and glass fiber mixed type plane grating rib comprises the following components in percentage by volume: 20%-35% of carbon fiber, 20%-35% of glass fiber, 40%-45% of epoxy resin, 0.6%-1.5% of curing agent, 1.1%-1.8% of accelerant, 0.8%-1.2% of low shrinkage agent, 0.6%-1.1% of release agent, 0.8%-1.6% of fire retardant, 0.2%-0.8% of antistatic agent and the balance being padding. According to the carbon fiber and glass fiber mixed type plane grating rib, elastic modulus is close to 145GPa, limiting strain achieves 3.5% and is about 2 times that of a common GFRP rib, damping property is good, fatigue resistance is good, and bond durability with concrete is good. The carbon fiber and glass fiber mixed type plane grating rib is widely applied to concrete marine environment structural engineering field and can be used as substitute for a rebar, the service life is prolonged, and designability is strong.

Description

technical field [0001] The invention relates to the technical field of reinforcement materials for concrete structures, in particular to a carbon fiber glass fiber mixed plane grid bar. Background technique [0002] In concrete construction engineering, reinforced concrete structures are widely used. This structure makes full use of the compressive properties of concrete and the tensile properties of steel bars, and has been widely used in the field of construction engineering for a long time. But as time went on, the disadvantages of this structure became more and more obvious. Due to various reasons, cracks often occur in reinforced concrete. When the cracks spread to the steel bars, the steel bars will corrode. This phenomenon is more obvious especially in the severe cold regions of the north, in environments where a large amount of ice-melting salt is used, and in coastal areas. Corrosion and rusting of steel bars affect the durability of reinforced concrete structure...

AI Technical Summary

Problems solved by technology

However, the tensile strength and elastic modulus of the sheet still need to be improved, and there are still technical deficiencies in the cohesiveness of the bonding interface.

Moreover, especially in harsh environments such as marine corrosion, the bearing capacity needs to be improved, and the durability, safety and impact resistance of the structure need to be improved.

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