关键词: 公路路面;超薄石脂面层;胶黏剂;拉伸性能;影响机理

Abstract: Ultra-thin aggregate resin surface has the characteristics of light weight,anti sliding,high construction efficiency and so on,making it widely used in paving.The adhesive of ultra-thin aggregate resin surface layer of highway pavement were made by mixing proportion design and experiments,and the effects on tensile properties of the adhesive of different types,different dosage of the toughening agent,diluent and curing agent were studied by tensile test for properties of resin casting body,and the influence mechanism of additives on the tensile properties were discussed by SEM and FTIR.The results show that the components in A group(epoxy resin and modifiers)is: epoxy resin E-51:epoxy resin E-44:toughening agent F1:diluent D1:flame retardant =50:50:20:10:8,and the components in B group(curing agent and modifiers)is: curing agent H1:promoter:coupling agent =70:10:2;as the amount of toughening agent F1 or diluent D1 increased,the tensile strength of epoxy increases first and then decreases,and the elastic modulus decreases,while the elongation increases continuously;the tensile strength of cured adhesive is 21.83 MPa,the elastic modulus is 0.47 GPa,elongation is 38.24％;polyurethane and epoxy resin interpenetrating each other,forming a tight network structure,and the diluent increases the ductility by reducing the crosslinking density of the adhesive,and the amino groups react with epoxy groups.

Key words: highway pavement;ultra-thin aggregate resin surface;adhesive;tensile property;influence mechanism