How To Repair Failing Concrete Expansion Joint with Belzona

In this video, we demonstrate how to repair a #concreteexpansionjoint. You will see how the joints edges are rebuilt and reconstructed, and how a new joint sealant is created. 
An expansion joint is commonly located on such structures such as bridges, highways and sidewalks. An expansion joint is a mid-structure separation designed to absorb vibration, join objects, or allow movement. In structures, expansion joints can help absorb the expansion and contraction of concrete slabs as a result of temperature changes. Without expansion joints, the concrete can crack or distort. However, expansion joints on their own are susceptible to failure. A major issue is incompressible materials that lock the joints and create stresses that may cause concrete spalling or shattering. As a result, seals are frequently installed in expansion joints to prevent incompressible debris from entering the joint. 

Conventional expansion joint seals have their own individual disadvantages and common failures. Belzona provides #polyurethanesealants that protect expansion joints from incompressible debris while offering advantageous mechanical properties including high movement capability, high elastic recovery, and high abrasion resistance. In addition, Belzona polyurethane sealants contain low odors and adhere well to a range of substrates.

Materials used:

For this repair, we used Belzona 4111 (Magma-Quartz) to reform the nosings of the joint, #Belzona2221 (MP Fluid Elastomer) to create a new joint sealant, Belzona 5231 (SG Laminate) to protect the expansion joint.