MMH,
1. Crushed concrete is as it is stated. It is simply recycled concrete from buildings, bridges, etc.
2. Crusher Run is a special type of limestone crushed stone that is a dense grade aggregate, or DGA. This is a mixed grade of mostly small crushed stone in a matrix of crushed limestone powder. This is great but I find it too much finer than crushed concrete.
From my experience, crushed concrete is much better.
Past experience:
I had 80 acres in Arcadia, Ok a few years ago in which I wanted a road into the land as there was only a crop field with a trail into the land. Nothing special was done to prepare the road. The road needed to be 3,000 ft long and 16 foot wide. First I had Crusher Run brought in and stone. It immediately (almost) disappeared in the OK dirt which is the consistency of baby powder in that area.
Next I used crushed concrete and it did not disappear. At first I thought there was a lot of "dirt". Then I learned this was the concrete "powder" and held the crushed concrete "rocks" It solidified fast and held up to 30 ton and more trucks. Also I noticed Bermuda grass would grow in it and learned there are a lot of nutrients in the crushed concrete.
That was early 2005 and I sold the land in 2006. However; I did not have to replenish or grade the road again and the new owner has not had to. He does have to bush hog it every now and then as some grass trys to come in as it loves the nutrients!
Important to note: Tell the rock company you do not want the finer grade of crushed concrete at the bottom of the pile. That you want more off the bottom of the pile that contains larger (average 3" or so) of crushed concrete.
Recent experience.
I did nothing to prepare the road. The trucks would only dump the load. They would not slowly go down the road leaving a trail almost like a crown. This was due to their safety in case a large amount of the load moved back too fast and lifted the truck.
The road (as noted) was full of ruts and low wet spots. I first dumped the crushed concrete into the worse spots and smoothed it out with a bucket. There were slightly bumpy spots because I never did this below and did so with a bucket, but nothing like before. A scraper would make it less bumpy, but I did not want to take the time (as of then). I kept adding bucket loads where it was wettest and came back to the spots a few loads later.
When finished the road was in such good shape my wife said she wanted our extended family Thanksgiving outdoors near the barn. Everyone (all "city folk") came and breezed without hitting bumps.
It has been a month and no wet spots, no degrading of the road. I will come back at some point with my scraper as soon as I learn how to hook it up! Learning as I go and reading this site before I do "whatever".
Jim
