[Greenbuilding] R-value of crushed stone under slab

[Alan Abrams]

a recent project required a lot of fill under an insulated slab. washed
crushed bluestone (aka #57's) was used for the fill, at an average depth of
24"

any advice on how to calculate the following:

R-value of the crushed stone
Heat capacity "  "  " , expressed as MJ(m^3K)

?????

aa


Alan Abrams

*certified professional building designer, AIBDcertified passive house
consultant, PHIUS*
*certified passive house builder, PHIUS*
cell     202-437-8583
alan at abramsdesignbuild.com
HELICON WORKS *Achitecture and Education*
<http://www.heliconworks.com/index2.html>
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