Study On Interfacial Bond Performance Between Textile And Cement Matrix

Textile reinforced cement-based composite material is a new kind of composite material which locating the textile in the interior of cement matrix as a reinforcing material,and this composite material has high bearing capacity,light weight,corrosion resistance and others.The bond performance between textile and cement matrix affects their mechanical properties and cooperative work,so improving the interfacial bonding between them is of significance.At present,the study on bond performance of textile reinforced cement-based composite material is mainly about single fiber pullout tests,however there is few textile pullout test.A series of experimental study and numerical simulation was completed in the paper,studying interfacial bond performance between textile and matrix.The specific work is as follows:1.Through the tensile tests of single fiber,the basic mechanical properties of textile are obtained,and provide mechanical parameters for the subsequent pullout tests and the finite element analysis.2.Based on the textile pullout tests,respectively study the influences of embedded length,surface treatment of textile,latitudinal fiber,matrix cover thickness and other factors on interfacial bond performance,which can reveal bonding mechanism and the way to enhance the bond performance.3.Add nonlinear spring elements between cement matrix and textile to simulate bond performance during drawing process.Based on textile specimen and single fiber specimen,analyze the stress of specimen and deformation of textile,and the results are in good agreement with tests'.The rationality of the model is verified.The results show that arrangement of latitudinal fiber can improve ultimate pullout force.4.The influences of fiber mesh size and cement matrix strength on ultimate drawing force and stress distribution are further simulated by this model.The results show that changes of fiber mesh size has little effect on bond performance;The increase of matrix strength will enhance ultimate drawing force and improve bond performance.