Filling Expansion Joints In Concrete Floor

Joints in slabs that will not be subjected to heavy hard wheeled traffic can safely be left unfilled or sealed with a flexible sealer. This can create an eyesore for some people plus make it more difficult to clean them out. The gaps in concrete are known as control joints or expansion and contraction joints and they are there for a substantial reason.

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Like i said in the intro these joints allow concrete pads to expand and contract during freeze thaw cycles.

Filling expansion joints in concrete floor.

The tile instructions say a latex fortified portland cement product but if i use that the joints are no longer expansion joints. What is the best product to fill the designed expansion joints. Filling contraction and expansion joints after epoxy coatings or sealers. Without a concrete expansion joint your sidewalk or driveway would crack.

Usually expansion joints are engineered in the floor at the time of construction but joints may be added at any time in the life of the floor. I am finishing a basement. Sometimes the contraction joints in a garage floor and the expansion joints around the perimeter of the floor can be very wide and collect a lot of dirt and debris. Joints are most effective when the aspect ratio of the slab is kept to 1 1 for example 5m x 5m if the slab is a narrower than it is long it is possible to increase this to a maximum aspect ratio of 1 5 for example 2m x 3m don t leave the placing of concrete expansion joints to chance and enlist the services of a structural engineer if several are required.

An expansion joint is basically a planned crack. Removing old material from a concrete expansion joint concrete expansion joints are also known as isolation joints. Glue down lvt over concrete 11 year old concrete that is in like new condition. Filling is done the full depth of the joint with a material that has enough compressive strength to support the edges of the joint from stresses imposed by heavy hard wheeled traffic.

What is an expansion joint. There are two different types of expansion joint engineered. Most people will consider filling these joints first before the epoxy or paint coat is applied for a smooth seamless finish with no dents and grooves. The concrete expands into the floor joints which relieves the pressure.

These joints are placed in the slab as an allowance space for concrete expansion. The joint is purposely placed in the concrete to allow it to move. Temperature changes make concrete expand and contract. But with the expansion and contraction joints in place applying a finishing coat on the garage floor will still make it look like a bare mosaic of concrete slabs only with color this time.

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