Definition - What does Joint Wrap mean?
Joint wraps are rubberized collars that are tightly wrapped around the exterior of a reinforced concrete pipe or manhole section joint to create a watertight seal that prevents moisture infiltration. The mastic base layer binds with the concrete to create a permanent seal and is sometimes further reinforced with the use of compression bands.
External joint wraps are typically used on round or elliptical pipes cross-sections and are effective on tongue and groove and bell and spigot joints.
Trenchlesspedia explains Joint Wrap
Joint wraps are an effective solution to preventing water ingress in manhole sections. The structural integrity of the manhole chimney can become compromised over time due to increased traffic loading, deteriorating materials and freeze and thaw cycles. This gives rise to cracks and joint openings in the adjustment rings which can allow water to enter the joints and weaken the structure.
To mitigate this, joint wraps can be used to create watertight seals to prevent moisture ingress and increase the service life of the manhole chimney and connecting structures.