Method for reinforcing concrete column by adhering CFRP cloth with high-temperature-resistant inorganic glue: Fid-Bau Portal

Method for reinforcing concrete column by adhering CFRP cloth with high-temperature-resistant inorganic glue

REN PENGFEI / SONG YUANBO / YAN KAI / ZHANG RUIXIN / LI YAO / WANG CONG

The invention discloses a method for reinforcing a concrete column by adhering CFRP cloth with high-temperature-resistant inorganic glue, and relates to the technical field of concrete structure reinforcement. The method comprises the steps of determining a reinforcement scheme and a to-be-reinforced area; the surface of the concrete column is pretreated, a to-be-reinforced area is positioned on the surface of the concrete column, and post-treatment is conducted on the to-be-reinforced area; preparing CFRP (carbon fiber reinforced plastic) cloth and high-temperature-resistant inorganic adhesive slurry required for pasting the CFRP cloth; wetting the to-be-reinforced area, and uniformly coating the prepared high-temperature-resistant inorganic adhesive cement on the to-be-reinforced area; wetting CFRP cloth, and pasting the wetted CFRP cloth on the high-temperature-resistant inorganic adhesive slurry; the surface of the pasted CFRP cloth is coated with the high-temperature-resistant inorganic adhesive slurry, so that the problem that traditional epoxy organic adhesives are not resistant to high temperature is solved, and the fire safety of a concrete column reinforcing system is improved. Meanwhile, a method for calculating the axial pressure bearing capacity of the concrete column reinforced by the CFRP cloth pasted with the high-temperature-resistant inorganic glue is provided, and a scientific basis is provided for performance evaluation of a CFRP reinforced concrete structure based on the high-temperature-resistant inorganic glue serving as an adhesive.

本发明公开一种耐高温无机胶粘贴CFRP布加固混凝土柱的方法，涉及混凝土结构加固技术领域。方法包括：确定加固方案及待加固区域；预处理混凝土柱表面，并在混凝土柱表面定位待加固区域以及对待加固区域进行后处理；制备CFRP布以及粘贴CFRP布所需的耐高温无机胶浆体；湿润处理待加固区域，并将制备好的耐高温无机胶浆体均匀涂覆于待加固区域；将CFRP布润湿后粘贴于耐高温无机胶浆体上；在粘贴完成后的CFRP布表面涂覆耐高温无机胶浆体解决了传统环氧类有机胶不耐高温的问题，提高混凝土柱加固系统的火灾安全性。同时，提出耐高温无机胶粘贴CFRP布加固混凝土柱轴压承载力计算方法，为基于耐高温无机胶作为胶粘剂的CFRP加固混凝土结构的性能评估提供科学依据。

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