A hybrid basalt fiber and glass fiber reinforced resin bar

Abstract

The invention discloses a hybrid basalt fiber and glass fiber reinforced resin which comprises glass fiber, basalt fiber and a resin, wherein the glass fiber and the basalt fiber are solidified by the resin, and the basalt fiber wraps the outer side of the glass fiber. The elastic tensile modulus and shear strength of the hybrid basalt fiber and glass fiber reinforced resin disclosed by the invention are significantly increased, and the excellent alkali resistance, tensile strength higher than that of the glass fiber, and elasticity modulus of the basalt fiber are fully used, so that the tensile strength, elasticity modulus and durability of a hybrid fiber reinforcement disclosed by the invention are improved under the condition that few cost is increased, and therefore, FRP (fiber reinforce plastic) reinforcements have the opportunity to be applied to more occasions.

Description

technical field [0001] The invention relates to a mixed basalt fiber and glass fiber reinforced resin bar. Background technique [0002] Rebar is the most widely used material in concrete structures or bolting applications. But as we all know, corrosion and rust of steel bars is a common problem, which has seriously affected the durability of concrete structures or bolt supports, leading to structural damage or support failure. Although there are currently surface-treated steel bars, such as epoxy-coated steel bars, galvanized steel bars, etc., as time goes by, the problem of corrosion and rust of steel bars still cannot be completely solved. [0003] In recent decades, many countries at home and abroad have adopted fiber reinforced resin bars (FRP bars) to replace steel bars and are used in various engineering fields. FRP (FIBER REINFORCED POLYMER) material not only has good corrosion resistance, but also has high tensile strength, good fatigue resistance and light weight...

AI Technical Summary

Problems solved by technology

[0004] Among the FRP bars that have been applied at present, carbon fiber bars (CFRP bars) and aramid fiber bars (AFRP bars) have the advantages of high tensile strength, modulus and corrosion resistance, and are the most ideal substitutes for steel bars in terms of performance. products, but the cost is very high, thus limiting their application

The tensile elastic modulus of ordinary glass fiber reinforcement (GFRP reinforcement) is only about 40GPa, which is much lower than that of steel reinforcement, and the shear strength is low (about 120MPa). The alkali resistance of the fiber itself is poor, and the special alkali-resistant glass fiber The cost is high, so its application range is also limited

Basalt fiber reinforcement (BFRP reinforcement) has good alkali resistance and a higher elastic modulus than glass fiber, but the current cost is much higher than glass fiber, which also poses certain restrictions on its application

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