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Basic Concrete Countertop
Nice job! I haven't done a counter yet but I've worked with concrete (professionally) quite a bit and I'd just like to note two things -Wear gloves! The nitrile rubber ones work well, but anything is better than nothing. Concrete will jack your skin up.You also mentioned something about pulling the form sides off to allow the concrete to dry more fully. Concrete actually cures as a chemical reaction with water, not like paint which dries by evaporation, so that's actually not necessary. Unless you're going to try to finish the edges, leave the forms on. You will actually notice the concrete pull away from the form slightly when it's well cured (wait at least a week for a project like this) and the forms should come off really easily. You could also paint or prime the particle board edges if you wanted to reuse them.
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What additives and fiberglass do you recommend? amounts/ bag?
I think your project turned out great but just to help people out who are trying to do this for a large project or an entire kitchen. PLEASE PLEASE do not try without the proper additives and fiberglass for your back coat if your not doing cast in place. Its much harder without the proper admixtures and the fiberglass will help to keep your counter tops from cracking. You can use regular concrete with water reducers but its only a few hundred dollars more on a large kitchen to do it with proper materials and if your going to put out the effort don"t skimp on materials.
Continuously running is what keeps the water from becoming stagnant and growing algae.
I'm not sure if that's an insult or not. If it is, keep in mind that one persons instruction doesn't guarantee another's skill. Personally, I'm impressed. It's CEMENT! As an island top! Ingenious and beautiful! Can't wait to try it.
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