Test and analysis of shear strength of asphalt adhesive layer

emulsified bitumen;  lower seal;  shear strength;  Bitumen dosage;  substrate materials;  Adhesion

Through the self-made shear test fixture, under the set shear temperature conditions, the shear strength test was carried out at a certain shear rate, and the shear strength of four different asphalt bonding layers of modified asphalt, modified emulsified asphalt, emulsified asphalt and viscous oil emulsified asphalt were compared, and the influence of three commonly used substrate materials on the shear strength of the bonding layer was compared with the three commonly used substrate materials of cement concrete, cement stabilized crushed stone and lime fly ash stabilized crushed stone, and the results showed that the higher the strength of the substrate material, the better the bonding effect between the layers. Combined with the factors of cost saving and convenient construction, it is recommended to give priority to the use of emulsified asphalt lower sealing layer in expressways.