Available Technology

Configuration and electro-osmotic pulse (EOP) treatment for degrading porous material

A configuration and treatment for degrading porous material, e.g., concrete, brick, or other masonry material, via rapid, efficient electro-osmosis. One application carries dehydration to an extent that it weakens a structure for demolition by significantly dehydrating its structural material. A durable, dimensionally stable anode is affixed to the structure and attached to a wire from a DC power supply. The anode is composed of a valve metal substrate with a semiconductive coating of a precious metal, cement or ceramic. Connection to a cathode through the power supply completes the circuit. A DC voltage is applied to the concrete structure by cycling a pro-specified pulse train from the power supply. One pulse train consists of an initial positive pulse followed by a shorter duration negative pulse and ends with a short off period before the pulse train is reinitiated. The cycle continues until the porous material has been determined to be sufficiently degraded.
Inventors: 

Stephen N. Flanders

Michael K. McInerney

Vincent F. Hock, Jr.

Philip Chitty

Patent Number: 
US6919005
Patent Issue Date: 
August 19, 2005
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