3000# bags sounds like 'super sacks' a re-useable bulk package w/ top loops for forklifts & an outlet valve on the bottom. I don't know if forks on a CUT FEL would lift them high enough to empty them, might need a jobsite forklift.
If this is the package type, figure on returning the MT sacks intact. I've had industrial raw materials dumpped from the bags into pnumatic hopper trailers, dockside w/ the folded sacks being shipped back for re-use while we delivered inland w/ the trailer. The sacks are expensive.
Soil Stabilization w/ portland cement is an old process. I've also seen landfill linings made w/ bentonite clay & excavated soil mixed in a pug mill. A thick mixture compacted w/ sheeps foot and vibratory rollers was installed under the bituminous layer w/ the leechate collection above. Very steep slopes and no rebar...
In NJ it is common to build road bases from formed and compacted sand but it is not beach sand. It has a more clay like color. Once compacted they lay the BCBC base layer of asphalt right onto the sand.
Coming from a cement producing area, I've seen a dump of 'stack dust' the cement dust that was collected by the stack pollution controls. They run a quarry dump out from the mill over top the pile & dump the new stuff at the end. It got really hard w/ just rain and traffic...
