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Title: Pollution damage to the Powell Building, Reston, Virginia

Journal Article · · Materials Performance
OSTI ID:20005874

Concrete column segments of the Powell Building (Reston, VA) exposed to the elements and wetted by precipitation were cleaned and roughened, but sheltered portions of the columns retained their smoothness and pollution accumulates, similar to observations for limestone, marble, and sandstone. Weathering effects on the columns were dominated by precipitation run-off and not the acidity of the precipitation. The process may be dry deposition of sulfur dioxide (SO{sub 2}) and nitric oxides (NO{sub x}) that formed soluble salts in the presence of humid air or dew, salts that were removed by precipitation run-off.

Research Organization:
Geological Survey, Reston, VA (US)
OSTI ID:
20005874
Journal Information:
Materials Performance, Vol. 38, Issue 12; Other Information: PBD: Dec 1999; ISSN 0094-1492
Country of Publication:
United States
Language:
English