peagravel/sand/3/4minus compaction
peagravel/sand/3/4minus compaction
(OP)
I'm filling in an old mechanics pit appox. 30' x 15' x 4'. It has concrete floor and walls. I will then be pouring back concrete to bring the grade to the same height. What is the best material to use as backfill? Pea gravel, sand, or 3/4" minus? I thought about CDF but the cost is higher than what the owners wanted.





RE: peagravel/sand/3/4minus compaction
the dense-graded aggregate sheds water so if it rains on the job you wont completly fill all voids with water. The 57 will just take any/all water that falls from the sky!
f-d
¡papá gordo ain't no madre flaca!
RE: peagravel/sand/3/4minus compaction
Geofoam is another possibility, but I have no idea how the cost compares.
I would consider doweling into the existing concrete perimeter for your new slab.
Ralph
Structures Consulting
Northeast USA
RE: peagravel/sand/3/4minus compaction
RE: peagravel/sand/3/4minus compaction
Hokie66,
CDF - I took it to mean 'Controlled Density Fill', which I would have presumed to be the same as CLSM (Controlled Low Strength Material) or Flowable Fill - all being a cementitious material.
Ralph
Structures Consulting
Northeast USA
RE: peagravel/sand/3/4minus compaction
RE: peagravel/sand/3/4minus compaction
RE: peagravel/sand/3/4minus compaction
I hope my interpretation of CDF was correct - I was really just guessing. It just kinda fit.
I agree with you about acronyms, even within the US there are regional differences. It's much clearer to at least spell it out completely the first time used in a post.
Ralph
Structures Consulting
Northeast USA
RE: peagravel/sand/3/4minus compaction
Yosh