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Dale(MO)
01-24-2005 14:52:05
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Re: Building a road in reply to BobinKY, 01-24-2005 09:45:25
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Here in East Central MO, we only have about 3-4 inches (in the good spots) of topsoil, so I usually try to go an inch or two below that, then 6" of 2-3 inch crushed limestone. I prefer the 2" minus (contains fines), because it packs well enough to drive on in a short time. The 2" clean, you have to be careful not to get too thick, because you'll need a wrecker to get out until it locks together. After it settles in, I put about 2-3" of 1" minus and grade it out with a little crown for drainage. A lot of people want 1/2" clean or 1"clean to top it off and make it pretty. The 1/2" works the best around here. As far as milled asphalt, it works well for a base. I haul asphalt for a living, and I get to mill a lot. The most important thing about using millings is to go at least 2-3" deeper than you would with crushed limestone, and spend some extra time grading to work in and break up the big lumps. A dozer works the best, as the tracks help pulverize the lumps, and it's easier to keep smooth grade. It settles a lot more than crushed rock, so it's best to get it at least 2-3" above your original grade. After it settles in, I like to top it with the 1" minus. I never regrade the base (2" or millings) after it has settled - that usually leads to soft places, as it has to resettle after being disturbed. But the main thing is to get below the topsoil with your base, then make sure your finished road is higher than original grade. 12 or 13 years experience has taught me a lot. Good luck!
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