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Compaction was evaluated of existing fills at seven sites. The field densities were evaluated with three different techniques. These techniques included: (1) the sand-cone method, ASTM D 1556; (2) the drive-cylinder method, ASTM D 2937; and (3) a smaller version of drive cylinder that was driven manually into the ground. Two comparisons were made: between sand cone and drive cylinder (ASTM D 2937), and between sand cone and smaller (manual) drive cylinder. The results indicate excellent agreement. A linear regression analysis of all the data points indicates a correlation coefficient of 0.972.
Principal engineer, Ninyo & Moore Earth Sciences Consultants, San Diego, CA
Stock #: GTJ10046J