Concrete security structures and method for making same

Abstract From the Canadian patent

Abstract of the Disclosure, A concrete security structure such as a money safe vault, or the like, is provided with unique burglar-proof qualities. The security structure includes a hardened concrete composition which possesses torch or high temperature resistance without flaking, spalling or exploding and superior resistance, to attack by means of burglary tools such as hammers chisels, drills, cutting implements or the like. The security concrete is derived from a moldable uniform mixture which comprises granular temperature resistant aggregates reinforcing filaments, an expansive cement and water. A method for making safes or vaults is provided by supplying a castable aqueous mixture of …