Preparation and property research of the modified epoxy grouting for concrete crack repair
BAI Lei
Abstract：Effect of the dosage of diluents,curing agent,defoaming agent,silica powder and coupling agent on the viscosity, compression strength,bending property,bonding shear strength and cohesive pulling strength of the modified epoxy gronting for con-crete repair was discussed. Results showed that the epoxy grouting acquired its best properties when the mass ratio of the epoxy resin(E-44),curing agent(593),diluents(501),diluents(692),coupling agents(KH-550),defoaming agent(B-313) and silica powder was 100:31:10:15:1.5:0.5:30. The viscosity is 1450 mPa·s and the working time is 65 min,the compression strength of 7 d is 64 MPa and the bending strength of 7 d is 35 MPa with non-brittle fracture,The bonding shear strength of 7 d is 14 MPa and the cohesive pulling strength of 7 d is 3.6 MPa with concrete cohesion failure. The prepared epoxy grouting completely meets the prop-erty requirements of the modified epoxy grouting as specified in GB/T 50728—2011"Technical code for safety appraisal of engi-neering structural strengthening materials".
Keywords：epoxy resinepoxy groutingconcretecrack repair
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 46-49 )