What is Lava? Molten rock that consists of all known metals and rocks. What is cement. Fine grain rocks held together by lime(another rock) Lava wins
Not for long, there would likely be more lava than cement and then the lava would win out. If it was just a sample of lava rather than a flow then it could hold but lava has destroyed many a home and highway, regardless of cement.
Yes cement can hold lava but it depends on the thickness. It would easily melt a thin container however a very thick container it would only melt the inner layers. I hope this is rhetorical (lol).
