Assignment 4

Assignment 4 - CIVE 353 - Geotechnical Engineering I...

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CIVE 353 - Geotechnical Engineering I ASSIGNMENT 4 Knight: Winter 2010 Page 1 of 2 Department of Civil Engineering Posted Date: Monday, February 1, 2010 Due Date: Wednesday, February 10, 2010 @ 4pm 1. A soil sample was taken from the site of a proposed borrow pit and a standard Proctor test was completed using a 4 inch diameter mold (volume=1/30 cu. ft). Test results are provided below. Determination No. 1 2 3 4 5 Dry unit weight (lbs/ft 3 ) 107.0 109.8 112.0 111.6 107.3 Water content (%) 9.1 11.8 14.0 16.5 18.9 a) Determine the total unit weight for each sample and create a plot of total unit weight vs water content and dry unit weight versus water content. b) Determine the soil maximum dry unit weight and optimum water content and comment on the two plots created in 1(a). c) On the unit weight versus water content plot developed in 1a) draw the zero air void curve assuming G s is 2.62, 2.65 and 2.72. What do you think the soil Gs value is? Explain your answer. d)
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This document was uploaded on 02/09/2010.

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Assignment 4 - CIVE 353 - Geotechnical Engineering I...

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