Oldestguy,
First, you cannot be the oldest guy, this year I was told I was older than god. Last year, just older than dirt.
Anyway, back to the subject, we got back some test results today of the rock under the dimples. Soluable Sulfate was as high as 706 and Soluable Chloride was 64. A Little...
You could call Northwaest Paving, Ltd at 780/468-4144 and ask them to look at the picture and tell you what piece it is. It does look like a bomag roller.
Drumchaser,
Recycled base mostly concrete, but there is some Lt Wt aggregate also.
City of Fresno is more like, I don't care what your recomendations are, the specs say to seal it.
Do you know what the root cause of the blisters were on the project you have seen?
I have a very large area paved with 2" AC w/RAP over 4" recycled base. The area was slurry sealed shortly after the AC was placed. It has developed many (well over 100), 6" diameter raised dimples in the AC Paving with hieghts of approximately 1/2". The dimples are random throughout the area...