Johnny Au
Senior Member
I have read the report linked by @Northern Light .
RAAC is a type of concrete that is lightweight, offers fire resistance, and is inexpensive. However, it is susceptible to moisture. When the Ontario Science Centre was built in 1968 (it opened in 1969), RAAC’s vulnerability to moisture was nnot fully understood at the time.
It even mentions the Ontario Science Centre!
RAAC is a type of concrete that is lightweight, offers fire resistance, and is inexpensive. However, it is susceptible to moisture. When the Ontario Science Centre was built in 1968 (it opened in 1969), RAAC’s vulnerability to moisture was nnot fully understood at the time.
Autoclaved aerated concrete - Wikipedia
en.wikipedia.org
It even mentions the Ontario Science Centre!