What three components make up a pourable seal?

A pourable seal consists of three key components: backing material, joint filler, and poured sealant.

The backing material provides support for the joint filler and sealant, ensuring that the sealant maintains its shape and performance over time. It also helps to control the depth of the joint, which is crucial for proper bonding and sealing effectiveness. The joint filler acts as a compression material that occupies space within the joint, adapting to movement while preventing debris and moisture from entering. Finally, the poured sealant is the actual material that provides waterproofing and protection against environmental elements. It adheres to the surfaces and creates a seamless barrier that is essential for maintaining the integrity of the joint and extending the lifespan of the structure.

Understanding these components is vital for ensuring proper sealing practices during bridge inspections and maintenance to effectively mitigate issues such as water infiltration and freeze-thaw damage.