An improved powder lance is opening up possibilities for still greater use of concrete- especially among missiles makers and operators of industrial plants who need no longer hesitate to install temporary concrete structures for fear of a precarious and costly removal job later. Burning a mixture of aluminum and iron powder in contact with pure oxygen, the lance literally melts away concrete with a very high temperature, high velocity flame. Extensive field tests have indicated that there is almost no limit to the thickness of concrete that can be pierced. Recent experiences for General Electric where a powder lance was used to slice up 8,000 feet of a turbine testing pit and for DuPont where a powder lance was used to slice through a 4 by 5 foot 38 ton concrete slab in 3 and one half hours all confirm this.