Concrete Expansion Joint

Minimize Cracking – Use A Concrete Expansion Joint

Concrete is similar to many types of construction materials, it succumbs to weather conditions.  Concrete expands and contracts with both moisture and temperature changes, resulting in unsightly cracks. This damage can be controlled if proper provisions are made using a concrete expansion joint, also known as control relief joints. 

These provisions for volume changes must be carefully applied at predetermined locations, preventing the stress forces that can produce cracks in the concrete. These expansion joints permit the expected volume change and any anticipated movement. Stress is always caused by the variations in moisture content.
 
Expansion joints are constructed by installing pre-formed material before the actual concrete is placed. The pre-molded expansion joints may be made of a variety of materials, including sponge rubber, plastic, fiber, and even cork. These materials must be very resilient and not extrude in extreme hot weather or get brittle in very cold weather. 

These concrete expansion joints should never be less than ¼” wide and should be utilized wherever a concrete member joins; such as a sidewalk, sidewalk with a driveway, a building, or a curb. Also wherever a floor slab will join a staircase or column. The concrete expansion joints are then sealed in all applications. These expansion joints are used in many outdoor, industrial, and commercial properties. It is crucial to the life of the concrete to minimize the cracks, not only is this unattractive, but it also damages the integrity of the material – making it hazardous and needing early replacement. It is very important that the installer is aware of the proper way to identify the locations that need a concrete expansions joint. If the concrete expansion joints are constructed and designed properly, the life of the concrete is increased.