Analysis of Test Results

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Analysis of Test Results Problems with guessing the compaction curve from the Family of Curves Out in the field, some testers interpolate a compaction curve to represent the material using the Alberta Family of Curves. One of the goals of this applied research, was to test the accuracy of this method. It was concluded that the only true way to verify the legimitacy of this curve is by doing index testing such as atterberg limits and grain size analysis on the soil. The City of Edmonton does require the testing firm to do a standard proctor and atterberg limits on each soil type on a project. A true maximum dry density and optimum moisture content can be obtained only by doing a standard proctor in the lab. Furthermore, the liquid limit and plastic limit values can give the tester a better idea on how much moisture variance is acceptable for the material. In case the Alberta Family of curves must be used to quickly obtain a compaction curve in the field, having a classification of the soil using atterberg limits and grain size analysis will provide the tester with backup information to interpolate a more reliable compaction curve. Does 100% of a one-point proctor equal 98% of a standard proctor? According to the City of Edmonton, 100% compaction achieved relative to a one-point proctor is as good as 98% compaction achieved relative to a standard proctor. From the test results conducted in this research, it was concluded that this comparison is incorrect. This is explained in
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