Electro-osmosis, in the form of Electro-osmotic Pulses (EOP) can be used as a means to prevent water intrusion in below grade spaces. In the last decade, EOP has been used to control water in below grade spaces built using concrete. This paper discusses the use of EOP to water migration through brick, concrete masonry unit, granite and sandstone. A 30 VDC potential drove water, doped with 0.1 M NaCl across a 4-inch thick specimen. The water transport rates in the above mentioned materials, measured in cm/hr, compared favorably with transport rates observed in concrete cells in similar experiments. While the transport rates were similar between different materials, the shape of the curve total electrolyte transported differed significantly between materials.

Subject
Sandstone, Buildings, Water, Materials, Electrochemical cells, Walls, Structures, Constants, Force, Experimental data, Waterproofing, Electroosmosis, Concrete
Keywords:
Electro-osmosis, Moisture Control, waterproofing, concrete
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2004
GOV
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