Can anyone tell me how much # 57 stone settles over period of time?
I am working on a project for a utility company. They had replaced some sewer service lines on a street about two years ago. The trenches were about 15 feet deep. They backfilled the trenches with # 57 stone below the base (crusher run of approximately 12 inches). Now, the city came back about month ago and overlayed the road with 1 1/2 inch of topping. In the service lines area, you can see the settlement about 1 1/2 inches creating a draw. We cored the site and took some compaction testing on the base material. Moisture was about 4 percent above optimum and compaction ranged from 75 to 85 percent.
what can cause the settlement. Where can I find some information regarding #57 stone to see how much it settles over a period of time.
Any information would help me greatly. Thanks
I am working on a project for a utility company. They had replaced some sewer service lines on a street about two years ago. The trenches were about 15 feet deep. They backfilled the trenches with # 57 stone below the base (crusher run of approximately 12 inches). Now, the city came back about month ago and overlayed the road with 1 1/2 inch of topping. In the service lines area, you can see the settlement about 1 1/2 inches creating a draw. We cored the site and took some compaction testing on the base material. Moisture was about 4 percent above optimum and compaction ranged from 75 to 85 percent.
what can cause the settlement. Where can I find some information regarding #57 stone to see how much it settles over a period of time.
Any information would help me greatly. Thanks