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Title: Analysis of Interface Properties Between TRC and Concrete Under Chloride Attack Based on Fracture Energy

Author(s): Shichang Li, Shiping Yin, Yu Gao

Publication: IJCSM

Volume: 14


Appears on pages(s):

Keywords: TRC, existing concrete, bonding performance, chloride corrosion, microstructure, fracture energy

DOI: 10.1186/s40069-020-00403-2

Date: 7/30/2020

As a type of cement-based composite reinforcement material, textile reinforced concrete (TRC) has the advantages of corrosion resistance, high bearing capacity and good crack limit performance. Its bonding performance with the existing concrete interface is the key factor afecting the reinforcement efect. To study the interfacial adhesion between TRC and existing concrete, the sodium chloride concentration, the frequency and number of dry and wet cycles, the bonding length of the TRC reinforcement layer and the type of reinforcement were analysed by a doublesided shear test, XRD (X-ray difraction) and SEM (scanning electron microscope) micro-test techniques. The infuence of other factors on the interfacial bonding properties was further elaborated based on the theory of fracture energy. The results show that interface damage under chloride attack was mainly divided into three typical interface failure modes. By increasing the concentration of sodium chloride, reducing the frequency of dry and wet cycles and increasing the number of dry and wet cycles, the interface microstructure damage could be aggravated. Using castin-place reinforcement and increasing the bonding length could enhance the bonding performance of the interface.