Joining Old Concrete With New Concrete Flat Floors

After you ve brushed your slurry mixture onto the old concrete you can apply the new concrete that you mixed.

Joining old concrete with new concrete flat floors.

Then build a perimeter or a wood brace that is the same height as you want the concrete to be. Joining new concrete slab to old concrete slab. Oyeah make sure when pouring the concrete to pull up on your wire mesh so it gets completely embedded atleast 1 1 2 from bottom into the concrete. A contractor will be cutting out the cracked portion and then re pour a new slab.

Concrete simply will not bond to all substances. You can join the new concrete right to the old concrete this is called a concrete construction joint. Over time this expansion and contraction especially if they occur at different rates due to the sections of concrete being exposed to different temperatures will work the sections apart and the crack will widen. When joining new concrete work to old concrete work the joint will always develop a crack and will be a point of expansion and contraction.

Make sure the braces are level and lay down a barrier of wire mesh over the existing concrete inside of the barrier. I have a major crack 2 in my garage slab due to settling. Your new slab once 100 cured and properly doweled should move with the old one. Joining new concrete to old joining new concrete to old happycamper computer op 7 feb 01 17 10.

Joining slabs involves creating a joint that both structurally connects the slabs and provides a flexural point to accomodate how the different ages of the slab will respond to climate and stress. Pour the new concrete on top of the old concrete. If too much water is lost into the old concrete there will not be enough water to hydrate all of the cement particles and a lower strength material will be the result. While it sounds complicated the proces to join two concrete slabs is easy but might take a few attempts to get it right.

You must mechanically remove these materials if you want the job to last. To lay new concrete sweep and clean the old concrete and saturate the old concrete with water. Just make sure your pouring atleast 4 thick 3000 psi on good compacted ground and allow it to cure properly. Paint oil glue from old flooring tiles are just a few.

Dump out all of the concrete onto the old concrete and spread it out with a hand trowel or a paver to form an even layer. The edge of the existing concrete that was sawed should be drilled and doweled so the new concrete won t separate lift or settle from the old concrete. Pouringconcreteoverconcrete bondconcretetoconcrete mikedayconcrete in this video i m pouring a new concrete floor over an existing concrete floor.