Question

The results of a standard Proctor test (ASTM performed in a standard mold with V-1/30 ft are given below Weight of wet soil Water content in the mold (Ibs 3.26 4.15 4.67 4.02 3.63 8.4 10.2 12.3 14.6 16.8 a) Plot the data on a plot of dry unit weight versus water content and determine the maximum dry unit weight and the optimum water content. As the geotechnical engineering consultant involved in the project, based on the results obtained in the laboratory you specify that the material be compacted in the field to a minimum of 105% of the maximum dry unit weight obtained in the Standard Proctor test, and at a water content within +2% of optimum Following compaction you conduct a sand cone test, and find that the volume of soil excavated is 0.045 ft. The soil weighs 6.772 lbs when wet, and 6.136 lbs after drying b) Does the compacted soil meet the specifications?

Answer 1