Of course, maize can be used for nearly anything!
You will find some info using the search engine at the USDA site:
http://www.usda.gov/http://www.usda.gov:3000/compass
Using <corn material insulation> for the search words finds an abstract:
http://warp.nal.usda.gov:80/ttic/tektran/data/000009/21/0000092136.html
that is titled:
STARCH-BASED LIGHTWEIGHT CONCRETE: EFFECT OF STARCH SOURCE, PROCESSING
METHOD AND AGGREGATE GEOMETRY
with this quote: "In addition, starches from corn were also effective."
Contacts for this research are listed in the abstract form.
