Inventors:
Michael K. McInerney - Champaign IL, US
Vincent F. Hock - Mahomet IL, US
Philip Chitty - Dayton OH, US
Stephen N. Flanders - Norwich VT, US
Assignee:
The United States of America as represented by the Secretary of the Army - Washington DC
International Classification:
C25B015/00
Abstract:
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.