Abstract: In order to solve the optimization problem of grouting layer in the application of prefabricated cement concrete pavement, an orthogonal test scheme with four factors (grouting type, bottom roughness, grouting thickness and base structure) and three levels was designed. The vertical static and fatigue loading tests and lateral loading test were carried out. Results show that the bottom roughness has the greatest influence on the bonding characteristics between the grouting layer and the surface layer. The grouting type has the greatest influence on the bonding characteristics between the grouting layer and the base layer, as well as the bearing capacity of pavement structure. After fatigue loading, the neutral plane of the surface layer exhibits upper shifts in different degrees. The relationship between deflection, pressure and fatigue loading times has three stages: dramatic change, linear change and stable stage. Under lateral load, high strength non-shrink grouting material (CGM) has the best bond with the base. The relationship between lateral load and superstructure displacement meet the quadratic polynomial pattern. When the grouting material is CGM, the slab bottom is smooth, the grouting thickness is 2.0cm, the base structure is 12% cement stabilized soil, the pavement grouting layer achieves the best bonding characteristics.

Key words: airport engineering; bonding characteristics; fatigue loading; grouting layer; prefabricated cement concrete pavement