Concrete Floor Joints

How to cut joints groover tools cut joints in fresh concrete.

Concrete floor joints.

Often times people think that concrete joints are put in to prevent it from cracking but truth be told they are simply to create a weak point so the concrete can crack in a more controlled manner. A fresh concrete mixture is a fluid plastic mass that can be molded into virtually any shape but as the material hardens there is a reduction in volume or shrinkage. Constantly walking on concrete floors is extremely hard on hip sockets. Saw cut contraction joints are ideal for decorative concrete because the joint is narrower and cleaner than a tooled joint.

As concrete goes through it s curing process it shrinks as much as 1 2 over 100 which of course will cause it to pull apart resulting in. Saw cutting cuts joints as soon as the concrete is hard enough that the edges abutting the cut don t chip from the saw blade. Concrete expansion joints also referred to as concrete isolation joints. Expansion joints in concrete floors earth s surface moves and for concrete floors this is a problem.

The hard landing on the concrete jars the joints in the hips causing long term damage such as arthritis or degeneration of the hip bone and may necessitate hip replacement surgery. May 6th 2019. Read about each one to learn how they are used to help control random cracking in concrete slabs floors sidewalks pool decks and driveways. Early entry saws make a nice clean cut for decorative concrete joints.

Place joints under walls or under carpet areas. Joints in polished concrete floors. They have done their work and during the finishing parts of a project it s now our turn to go to work. The concrete company has come and gone.

Concrete joints are normally used to prevent cracks when the concrete shrinks by creating forming tooling sawing and placing joint formers. You can t lay a large concrete floor as a solid contiguous block of concrete because over time unsightly cracks will appear across the surface of the floor. Soff cut s 150d saw is designed for decorative cuts. Cut joints deep enough cut joints 25 of the depth of the slab.

The pre planned cracks will provide a better finish concrete product and will be formed in specific locations where those cracks could be monitored. As we know control joints more properly according to the american concrete institute contraction joints are essentially planned cracks that allow for movements caused by temperature and moisture changes drying shrinkage. In other words when the concrete does shrink and crack the control joint is placed so that the slab will crack on a. A 4 thick slab should have joints 1 deep.

Contraction control joints are placed in concrete slabs to control random cracking.