The article of his that I re-read regularly is titled “Sand won’t save you this time.” The topic is Chlorine Trifluoride, which will burn asbestos firebrick!
>It burned its way through a foot of concrete floor and chewed up another meter of sand and gravel beneath, completing a day that I'm sure no one involved ever forgot.
https://www.science.org/content/blog-post/sand-won-t-save-yo...