aerocrete
noun
aero·crete
ˈer-ō-ˌkrēt
: a lightweight concrete
In the past year, CITIC and other departments have administered dozens of projects including production of chemical fibre, linen cloth, … and "aerocrete." 
BBC Summary of World Broadcasts, 2 Dec. 1981
BBC Summary of World Broadcasts, 2 Dec. 1981
Word History
Etymology
formerly a trademark
First Known Use
1926, in the meaning defined above