Publication year: 2010 Source: Geotextiles and Geomembranes, In Press, Corrected Proof, Available online 13 November 2010 Mohamed M., Mekkawy , David J., White , Muhannad T., Suleiman , Charles T., Jahren A recently completed field study in Iowa showed that many granular shoulders overlie clayey subgrade layer with California Bearing Ratio (CBR) value of 10 or less.

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Mechanically reinforced granular shoulders on soft subgrade: Laboratory and full scale studies

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