Reinforced concrete structure plate and its prepn process

Abstract

The concrete reinforcing sheet is used in reinforcing and repairing damaged concrete structure. The concrete reinforcing sheet consists of resin base 15-50 wt% and mixed fiber 50-85 wt%. The resin base consists of nylon 84-90 wt%, antioxidant 2-4 wt%, viscosity reducer 3-10 wt%, and demolding agent 1-3 wt%. The mixed fiber consists of carbon fiber 50-90 wt% and aramid fiber 10-50 wt%, or consists of carbon fiber 50-80 wt% and E-glass fiber 20-50 wt%. The production process includes arranging fiber, soaking with resin, forming and curing, and cutting and packing. The concrete reinforcing sheet has excellent mechanical performance, high impact resistance, high hardness and toughness, high wear resistance, high weather resistance, and high chemical stability.

Description

technical field [0001] The invention relates to a reinforced material for strengthening and repairing damaged concrete structures, which can enhance structural performance, and belongs to the technical field of concrete reinforcement and repairing materials. Background technique [0002] The aging of concrete itself, improper construction on site, structural design errors and natural disasters have caused damage to a large number of concrete structures in various countries in the world. [0003] At present, carbon fiber cloth is the dominant reinforcement material at home and abroad. Pure fiber cloth is not pre-impregnated with resin before use, and then infiltrated during construction. Its usage is the largest and the technology is the most mature. Instability, serious pollution to construction personnel and the environment, and low work efficiency. The application of continuous fiber reinforced resin material (Fiber Reinforce Plastic, referred to ...

AI Technical Summary

Problems solved by technology

This preparation technology has simple process and simple equipment, but the problem is that the solvent must be completely removed, because very little residual solvent may lead to a decline in the solvent resistance of the product, and in addition, there is physical separation during the solvent removal process. The solvent penetrates along the resin fiber interface and the solvent may accumulate in the small pores and voids on the fiber surface, resulting in a poor interface between the resin and the fiber

[0028] Vacuum molding refers to the process of pre-cutting a sheet of a certain size and moving it to a stainless steel mold after preheating, sealing the periphery of the sheet and the mold, and then vacuuming the cavity to make the sheet stick on the mold. On the cavity, heat to the melting temperature of the resin, apply a certain working pressure, keep it for a certain period of time, then lower the temperature and pressure, and then demould to obtain the desired shape of the product. It is also difficult to produce thin and long reinforced sheets.

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