Concrete is a reasonably soft but sturdy solid grey material which can be very quickly destroyed with explosions. It will cause any nearby Cement to also harden into Concrete.
|70||Cement + Concrete||Concrete + Concrete|
|80||Cement + Fire + Cement||Cement + Air|
|100||Cement + Water||Concrete + Air|
|100||Cement + Wood||Concrete + Wood|
|90||Cement + Air||Concrete + Air|
|100||Water + Cement||Concrete + Air|