Thursday, November 16, 2006 - 10:55 AM
318-10

Amendment of High Strength Properties of Waste Foundry Sands with Gypsum.

Jason De Koff, Purdue University, 3907 Ledyard Street, West Lafayette, IN 47906, Brad Lee, Purdue Univ., Agronomy Department, 915 W State St., West Lafayette, IN 47907, United States of America, and Robert Dungan, USDA-ARS, USDA-ARS-EMBUL, 10300 Baltimore Ave, bldg 306, room 113, Beltsville, MD 20705.

Indiana ranks second in the nation in waste foundry sand production with one million tons annually disposed in landfills. As available landfill space and profit margins steadily decrease it becomes more important to find ways of diverting waste foundry sand away from landfills and identify beneficial uses of this material. This study is part of a larger project that focuses on using waste foundry sand as a soil amendment in urban and rural agricultural applications.  The use of Na-bentonite in green sand binders was found to cause high strength in sands when moistened and dried which would be problematic for use in soil.  Waste green sand from an Indiana iron foundry containing Na-bentonite was amended with gypsum to help ameliorate these high strength problems.  Data from compression strength tests performed before and after gypsum addition will be presented and discussed. 

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Back to The ASA-CSSA-SSSA International Annual Meetings (November 12-16, 2006)