Prevention of seepage crack control terrace expansion joint

The utility model provides a prevention of seepage crack control terrace expansion joint, includes the expansion joint body, establishes the recess on the wall of expansion joint body both sides, packs the inflation silicon PU of semi-fluid attitude in expansion joint body and the recess. The utility model provides a prevention of seepage crack control terrace expansion joint, the raw materials of caulking are the inflation silicon PU of semi-fluid attitude, and it has a microdilatancy nature, and finished product seam material has an initial internal stress, can the effective resistance terrace is flexible be out of shape, simultaneously with the combining closely of slotted wall, can effectively improve part (the seam position) of terrace the water permeability can, the expansion joint both sides set up the recess, can make original flexible slotted wall and silicon PU's contact surface no longer neat level and smooth, prevent its influence that receives easy temperature or vibrations and neat fracture, consequently, the utility model provides a terrace expansion joint has good prevention of seepage crack control function, and durable practicality, the wide no requirement (NR) of opposite joint.