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Geoenvironmental behavior of foundry sand amended mixtures for highway subbases
 

Summary: Geoenvironmental behavior of foundry sand amended mixtures
for highway subbases
Yucel Guney a
, Ahmet H. Aydilek b,*, M. Melih Demirkan b
a
Department of Civil Engineering, 2 Eylul Campus, Anadolu University, Eskisehir 26480, Turkey
b
Department of Civil and Environmental Engineering, University of Maryland, 1163 Glenn Martin Hall, College Park, MD 20742, USA
Accepted 16 June 2005
Available online 18 August 2005
Abstract
The high cost of landfilling and the potential uses of waste foundry sands have prompted research into their beneficial reuse.
Roadways have a high potential for large volume usage of the foundry sands. A laboratory testing program was conducted on
soil-foundry sand mixtures amended with cement and lime to assess their applicability as highway subbase materials. The mixtures
were compacted in the laboratory at a variety of moisture contents and compactive efforts and subjected to unconfined compression,
California bearing ratio, and hydraulic conductivity tests. The environmental suitability of the prepared mixtures was evaluated by
analyzing the effluent collected during hydraulic conductivity tests. Finally, required subbase thicknesses were calculated using the
laboratory-based strength parameters. The results of the study show that the strength of a mixture is highly dependent on the curing
period, compactive energy, lime or cement presence, and water content at compaction. The resistance of foundry sand-based spec-
imens to winter conditions is generally better than that of a typical subbase reference material. Laboratory leaching tests indicated

  

Source: Aydilek, Ahmet - Department of Civil and Environmental Engineering, University of Maryland at College Park

 

Collections: Engineering