Palmer78
Well-Known Member
Can you generally achieve 95% compaction using a jumping jack if you beat the hell out of it and put in maybe 6 inch lifts? I'm not quite sure of the soil type.
Yeah I found that site too with a quick google search. I was more interested in d4c24a's hands on experience filling trenches in the street.
basicly its a weaker mix of concrete using a foaming agent ,can be dug out fairly easily with an excavator ,very much like an aircrete block
when dispatched its very much a slurry mix ,and runs into all the voids /cracks etc that you cannot get via normal trench fill / compaction
when backfilling with stone on a class A road the tarmac will need to be 360mm thick ,when using foam its 100mm ,10/15 minutes to dispatch 16m3
2 days ready for tarmac
before and after pictures
I have backfilled sand in 18" lifts, couple passes with the jumping jack and never had a problem hitting 95%+. Material and moisture content is key.
Using sand to backfill in my area would be very expensive. It's always interesting to learn how folks work in other areas.
Here will have fill grade sand which is cheaper than masonry sand....make that "less expensive". It's unfit for mortar, but it's still not cheap.