sand cone method

การทดสอบความหนาแน่นของดินในสนาม Field Density Test

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field density test

Field Density Test Service

A. Rubber-Balloon Method 1. Position the density plate on a flat surface and set the volume measuring apparatus in the recessed hole in the density plate. 2. Hold the apparatus down firmly in position, open the control valve, pump the balloon down with the rubber bulb until the water level in the graduated cylinder has