Hi George, I've got a few questions and hints for ya. 1) Are you in Mississippi or do you get freeze thaw cycles?
2) What kind of shape is the old floor in? Is it cracked or crumbling really bad or heaving 3)If it has a lot of cracks the new floor will crack in the same spots that the old one is.
4)if it is crumbling or flaky the new floor will not bond to it no matter what you do. Preparation of old floor:
1) power wash it to remove ALL dirt and loose chips of concrete
2) Let the floor dry as long as possible and keep it clean.
3)With Good ventilation, some kind of filtration mask, eye protection and gloves. scrub the floor with Muriatic acid and a stiff bristle PLASTIC brush (Follow the dilution rate on the acid you buy). This will etch the floor and give it a tooth for the new to bond to. (kinda like painting)Let this dry for 24 hrs.
4) Scrub the floor again with water and a brush to remove the white residue that the acid left. pouring the new floor
1) I use a polymer bonding agent between the old and new concrete. I buy it in a 50# bag and mix with water. You can find this stuff at a contractor store. Ask the guys there and follow the directions on the bag.
2) The stuff I use is done this way, 1 cup poly to 1 cup water, mix and role it on (like painting) let it dry 1-2 hours. Mix up another batch roll it on part of the floor cover it with the new concrete right away, repeat this till the floor is covered. You will need a few guys to get this done, so you don't fall behind with the concrete!!! Where you taper it down to nothing on the one side, You can expect it to chip and peal back aways. The fiber is a good idea, Six X Six wire mesh will help hold it together also. Good Luck !!
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