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dreamdoctor

Post-tensioning is usually used in commercial projects - pretty specialized. Use high strength concrete ans keep the water to a minimum - find out how to do a slump test. A lot of the reason concrete shrinks is from the water drying/seeping out; that is why you don't want any excessive water in there (especially if pouring on foam or moisture barrier). Excess water can cause other problems too such as sitting on top of the curing slab and weakening the surface. Drier concrete is harder to install but a whole lot easier than tearing out a slab and pouring it again.

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Restore All Concrete

Concrete
cracks happen - its inevitable but knowing how to address them is vital for
the longevity of the concrete. Whether its for your home's foundation, patio
or driveway.

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dreamdoctor

My mom was going to tear out her concrete steps because they had cracks in them. A contractor quoted her $5K - wow - these are not very big. She had done a skim coat on them which did not turn out well. She had someone come and grind the surface smooth and then I mixed up some liquid EPDM (rubber roofing) with pigment to match the concrete's color. First I mixed the EPDM with fine sand and filled in any larger cracks, then I used a paint roller to apply the EPDM. Once it was on I broadcast sand onto the surfaces and rolled it in with a dry roller. I had to leave before it was cured/sand swept off and I could get photographs but it looks like concrete and will shed water and be flexible in extreme temperatures. Probably should use a broom to remove snow but it should be fairly durable once it cures completely.

Before

After

Front and back steps - $300.

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