Clay Compaction
Clay Compaction
(OP)
Does anyone have an idea what the compaction factor is for clay once it is taken from a stockpile, hauled by trucks and compacted on site at 95% standard proctor? I need to know what increase in volume due to compaction I need to account for.
Thanks
Thanks





RE: Clay Compaction
If you need to figure out truck counts, I would assume 14 CY bank for you average road legal truck. Clays tend to have a high moisture content and therefore can be very heavy.
RE: Clay Compaction
RE: Clay Compaction
The "clay" we have in Colorado has high variations of shrink/swell factors. I'm not a geotech, but to say you should not expect any swell or shrink would be VERY misleading to any engineers working in my location.
I've recently had a site where the clays had a 30% swell factor, but that was from in-situ soil. Assuming you are grabbing this material from an existing stockpile, you should not have to worry about the swell factor, but would agree that you should definitely expect some shrinkage when you compact it to 95%.
Due to the fact that all soils are different, I would recommend that you have a geotech engineer give you the shrink/swell factor for this soil (they do it all the time), or else you're simply going to be making assumptions, and you could be WAY off on your truck load calcs if you're hauling a lot of dirt.
RE: Clay Compaction
One item to include in this discussion is why there is clay being trucked to the job site? If I was paying for fill to be delivered to the site, I'd want some bank run material (i.e., silty/clayey sand, etc.) rather than something that's potentially hard to use with a low subgrade support value - maybe that's just me. . . .
When going cut to fill, the truck shrinkage factor (again to me) just isn't relavent. The density from the cut v. the density in the fill is often about the same (or within a few percent).
f-d
¡papá gordo ain’t no madre flaca!
RE: Clay Compaction
Hope this helps.
RE: Clay Compaction