A new type of prestressed concrete (PC) precast slab pavement was developed., which improves some defects of conventional PC precast slab pavement tightened in the transverse direction with prestressing tendons.
　In order to be able to lay and keep the slabs exactly level and to exchange old damaged slabs without disturbing all the adjacent slabs, a new type of joints named horn-joint was developed. This technique is inserting an arc-shaped steel bar from the surface of the slab into an arc-shaped plastic tube cast in the slab and grouting the gap between the bar and the tube.
　The results of series of experiments show that PC precast slab pavements connected with the horn-joints have sufficient load carrying capacity, durability and performance under heavy aircraft loading condition. It is also confirmed that the simple procedures to remove the grout and the steel bar from the horn facilitate
partially replacement of damaged slabs.
　Furthermore, the method to grout between base courses and slabs and the method to prevent and correct unevenness between neighboring slabs were improved.