Material used in Expansion Joint
1. Joint filler:
It is a strip of compressible material used to form & fill the expansion joints in structures. The main functions of the joint filler are to permit the components of the joint to expand without developing compressive stresses as a result of thermal or other changes. It is produced from a variety of material such as bitumen , natural rubber, bitumen containing cellular materials etc.
2. Sealing Compound shall satisfy the following requirements:
a) To seal the joint against the passage of water.
b) To prevent the ingress of grit or other foreign matter.
3. Water bar:
Its function is to seal the joint against water penetration. Water bar may be of natural & synthetic rubber, PVC etc.