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Old Posted Jan 16, 2017, 12:22 AM
City Wide City Wide is offline
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Originally Posted by vexxed82 View Post
Sort of a general construction question: Aside from the physical forces of gravity, and re-bar, is there a chemical reaction that fuses different 'pours' of concrete together?

Specifically in regards to the foundation columns that have been recently dug out. Clearly, the caissons are cured (mostly), and although new rebar will be tied to the existing rebar, will there always be a joint, however minuscule, between the top of the old column pour, and bottom of the new column pour?
I've got no idea if its used on projects of this scale, but there are bonding agents, a liquid, that claim to be able to join new concrete to old.
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