By Nell Velez. Concrete Tools. Published at Monday, April 09th, 2018 - 20:08:52 PM.
The next operation was using a hilt chipping hammer to remove all the concrete between the scores down ¾ of an inch so that the Cerlon can be poured at least ¾ of an inch thick. Only a ½” of Cerlon is needed to make the area impervious to the salt, but we figure that we go to ¾ of an inch to make sure the salt will not affect our repair. Once this is done and the spoilage is removed the concrete has to be cleaned and remove as much of the dust as possible. Cerlon will chemically bond with the concrete so you do not need to put any product as a bonding agent as you do with concrete.
If the existing floor surface needs to be solidified and densified, the contractor might apply penetrating hardeners to the concrete. This usually happens after first stage of the grinding process. The hardeners can be used on both existing or new floors and react chemically with the concrete to result in a hard crystalline structure. In addition, the hardeners offer extra protection from staining and water penetration and also prevent the concrete dusting.
Mixing the Cerlon with the paddle causes heat to start to build up in the mixture. Heat causes the Cerlon to set. Using a heat gun you need to get the temperature up to about 80 to 90 degrees before you pour it into the area that needs to be repaired. Once it reaches 100 degrees you have only about 10 minutes to finish the patch with a trowel.
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