Relative density testing works best when granular soils do not respond well to Proctor moisture-density tests. Determine maximum density by placing soil sample in molds and densifying using a vibrating table and surcharge. Determine minimum index density by loose placement in the molds using pouring funnels, scoop, or shovel, of soil particles. The vibrating table has a cushioned steel 30″ x 30″ deck. It activates by an electromagnetic vibrator with over a 100lb actuator. The solid state circuitry allows precise amplitude control even with fluctuating voltage supplies. The relative density molds are constant volume change cylinders that regulate sample size in determining relative density of cohesionless soils. The gauge set fits guide brackets of either mold set to measure distance. Measuring from the top of the mold to the top of the base plate after densification.
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