For what will the road be used? What kind of stone are you placing?
In most places I've worked, there was no density testing of roadways in cut since the soil was consolidated. However, there was always a proofroll done to determine if there were any areas of organic material, plastic clays...
Wow- that's scary, but I'm glad to get some real-world experience. I'm assuming the failure was due to lateral movement of the #57 stone? Was the stone static rolled in layers to consolidate them?
I'm not sure how much of a difference it makes, but I've modified the pavement section somewhat-...
Thank, Ron. That's what I did initially using the AASHTO Design Guidelines. However, I wasn't able to find a good layer coefficient for the 57 stone or AASHTO #2 stone and used an estimate based on the number for ABC. I just wasn't comfortable with it.
Based on that and the turning movements...
57 stone in pervious pavement has been in use for decades. The Walden Pond installation was the first pervious (asphalt) pavement installed in the US and has held up well since 1977. It was built with 2.5 inches of porous asphalt, over 1.5 inches of AASHTO Type A washed stone, over 10.5 inches...
Thanks, Ron. Are you saying that 57 stone is not stable enough for even the parking areas or because of the fire truck loading?
This is commonly done with pervious pavement in parking areas and low-volume travel lanes- 57 stone is used as the base course with pervious asphalt as the surface...
I am currently designing a pervious paving parking lot for a fire station. Due to the loading, I'm only using pervious asphalt in the automobile parking bays and standard asphalt in the drive lanes. My question is whether it will be stable if they pave directly on the 3-foot thick base of 57...
