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DIRTY CEMENT
Several years ago I heard about using dirt to mix concrete for driveways sidewalks etc.
Forget the mix ratios, etc., and the steps and procedures for doing it.
Anyone here herd of this or know anything about it,
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DIRTY CEMENT
The closest thing I ever knew of far as using dirt in cement is remembering my Dad and his brothers getting together to pour cement for something when I was kid. they would start a couple days ahead hauling what they called "Creek Sand" in wagons to where they were going to mix the cement. They would find the equivilant of a sand bar in a river in the creek on the farm. They loaded it with pointed shovels. I guess there was enough larger stones in the sand to provide both sizes of aggregate as that's all I remember them using in the mix with the cement. Far as using just ordinary topsoil in the mix, I can't recall ever hearing of that. Just more of my ramblings. Frank.
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DIRTY CEMENT
Keep rambling, Frank. Let us mine the gems out of it.
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DIRTY CEMENT
Many of the quickrete just add water mixes are sand mixes. Using clean sand is ok. That's why Frank's dad got clean sand from a creekbed. It's just not as strong as a mix that contains larger aggregate.
Don't use any topsoil for the same reason you don't want to use topsoil for fill. Topsoil is not a stable material and rots over time due to the vegetable matter in it.
Dave
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Do not use dirt in concrete. Dirt asorbs moisture which will expand when frozen and crack the concrete. Also, the finish coat will flake off and the concrete in general will crack and cumble quite quickly. Always use clean sand and agregate.
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Note that rammed earth house construction employs soil with Portland cement added, pressed (rammed) into molds for the walls of these structures. I imagine you can get concrete of as much as 500 psi compressive strength. Rebar is also used.
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