Perlite compressive strength?
I’m considering the use of bagged or loose perlite to insulate below a basement slab. Can it also be used under footings? I can’t seem to find it’s load bearing capacity. Has anyone used a “penetrometer” on either loose or bagged perlite concrete block fill ( the grade recommended for below slabs)? Penetrometers are used to judge the weight bearing capacity of soils. Though the Perlite institute advocates use under slabs it would be comforting to know it’s load bearing capacity. when tested as a “soil”. Actual test data would answer the questions about where it can be used.