Experimental Study On GFRP Anchor Corrosion Resistance And Bond Durability

GFRP (Glass Fiber Reinforced Polymer) is a new type of material compound with glass fiber and resin, By its made of GFRP anchor has the advantages of high strength, corrosion resistance, light, which Has been gradually replacing the steel bolt used in mines, ports, slope reinforcement works. With the increasingly wide application of the GFRP anchor in the actual project, People pay more and more attention to the long-term applicability of the bolt. This paper summarizes at home and abroad based on the study of GFRP anchor, according to the deficiency of the durability of GFRP present situation, proposed for durability and rod body rod body bond durability. The main research contents are as follows:(1) Through the45root GFRP anchor in acid、alkali、salt environment in corrosion test, compared with normal rod obtained in three different corrosion time and corrosion in three different solubility under the rod mechanical properties change data, we can obtain the change rule and the possible mechanism of corrosion.(2) Fitting analysis on the mechanical properties of the GFRP anchor in acid, alkali, salt, three environmental decay data, we can obtain attenuation empirical formula of the mechanical properties of the GFRP anchor under the control of the time factor and solubility factors in three corrosive environments attenuation empirical formula.(3) By the Acid, alkali, salt corrosion of27root GFRP anchor bond slip test, we can obtain attenuation data under its corrosion test phenomena and bond slip behavior. We can analysis the data changes in the law and obtain the corrosion mechanism.(4)Through to the nonlinear fitting data analysis of acid, alkali, salt three environment bond properties, we can know the empirical formula of three corrosion environment GFRP anchor bond strength in the time factor under the control of mechanical properties of attenuation.Through to the analoging of the previous research data, we can obtain acidic, alkaline, salts, environmental corrosion ultimate bond strength after70years in conventional geological conditions.This article on the GFRP anchor rod durability and bond durability of the research results, provide the relevant experimental data and theoretical basis in this field for the deep research. We provide a reference for establish GFRP anchor durability design theory, and have a certain guiding function in the engineering application.