What material is good for structural fill?
Answer:
glass cullet
this is basically crushed up bottles. You may even be able to get it free!
my last project they gave me 100 tons
there is quite a bit of technical data out there for the properties,
but it is great,
free draining, wont load up
great for wall backfill
can be compacted
It is generally a mixture of sand and crushed rock.
Companies that sell landscaping rock and materials actually sell pre-mixed fill material to exact specifications.
Your local city/county/parish ordinances will sometimes specify the exact type and amount of fill material required for a given type of construction.
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It depends on what is locally available. In my area we use crushed limestone. I would recommend a CA-6 gradation.
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