Study on adhesive property of SAC-sealant for cracks in asphalt pavement

Key words:  filling material  adhesive performance  additive  fracture energy  ultimate displacement  ultimate value

Abstract:

On the basis of the characteristics of SAC-sealant, an adhesion performance evaluation method based of the fracture energy theory was established. The effects of different additives on the adhesive performance of sealant were investigated, and mechanism was studied as well. The results indicate that the tensile and shear fracture energy between SAC-sealant and the original pavement can be greatly improved by the addition of AR and SBR compared to other additives. And there is a positive correlation between the fracture energy and the amount of AR or SBR. The fracture energy between SAC-sealant with AR and the original pavement is mainly affected by the improvement of ultimate bond value. The addition of AR improves the ultimate tensile value of asphalt component and the ultimate shear value of cement mortar component. The fracture energy between SAC-sealant with SBR and the original pavement is mainly affected by the improvement of the ultimate displacement. The addition of SBR improves the ultimate tensile and shear displacement of asphalt components.