Many joints exist in the huge concrete structures. These joints tend to be a weak point of the concrete structures. Especially the leakage of water from the joints in an underground structure and a water processing structure causes the decrease of durability of the structures. Many running costs are needed to prevent the leakage of water and to maintain the durability of the structure. Therefore, seal of the joints is very important.
This paper describes seal materials in a construction joint and an expansion joint to the concrete structures.
