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lab8_03 - The University of Iowa Department of Civil...

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The University of Iowa Department of Civil & Environmental Engineering Fall Semester, 2003 53:030 Soil Mechanics Lab Experiment Number 8: 1-Dimensional Compression Test on Dry Sand A. Objective In this laboratory experiment, one-dimensional compression of both “loose” and “dense” sand layers is measured. The results of these compression tests are used to estimate the “e vs. log ” behavior of the sand. B. Experimental Procedure 1. Prepare two test samples, one loosely packed, and one densely packed as demonstrated by the lab instructor. These samples will be placed in the oedometer apparatus and testing machine shown in Figure 1. a. Measure the height of the metal collar. This will be the initial height of the sand layers. b. Measure the inside diameter of the collar, and use this value to compute both the cross-sectional area initial volume of the sand sample. c. Place the collar on a porous end cap of either sandstone or ceramic, and take the combined mass.
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