03.09 product manual H-3750.2F & H-3750.
Introduction Product Description Apparatus determines the relative density of cohesionless, free-draining soils and provides well-defined results on soils that do not respond well to conventional moisture-density impact compaction testing. Soils for which this method is appropriate may contain up to 12 percent of soil particles passing a No. 200 (75µm) sieve, depending on the distribution of particle sizes, which causes them to have free-draining characteristics.
g) h) i) Dial Indicator Gage Holder. Dial Indicator. Calibration Bar. Calibration Determine the volume of the mold by direct measurement and check the volume by filling with water as provided in a). Determine the initial dial reading for computing the volumes of the specimen as provided in b). a) Volume by Direct Measurement. Determine the average inside diameter and height of the mold to 0.001 inches. Calculate the volume of the 0.1 cu ft mold to the nearest 0.0001 cu ft and the 0.
Dry the soil sample in an oven at a temperature of 230 ± 9 F (110 ± 5C). Process the soil through a sieve with openings sufficiently small to break up all weakly cemented soil particles. Minimum Density Procedure Determine the minimum density (zero relative density), (maximum void ratio) as follows: a) Select the pouring device and mold according to the maximum size of particle as indicated on the chart in Sample section. Weigh the mold and record the weight. Use oven dried soil.
2 Assemble the guide sleeve on top of the mold and tighten the clamp assemblies so that the inner wall of the sleeve is in line with the inner wall of the mold. Tighten the lock nuts on the two set screws equipped with lock nuts. Loosen the clamp assembly having no lock nuts. Remove the guide sleeve. Weigh the empty mold and record the weight. 3 Fill the mold with soil by the procedure specified in b) or c). Min. Den. Proc.
Calculations a) Minimum Density. Calculate minimum density in pounds per cubic foot, as follows: g dmin = Ws Vc b) Maximum Density. Calculate maximum density, in pounds per cubic foot as follows: g dmax = Ws Vf Where: Ws = weight of dry soil, pounds Vc = calibrated volume of mold, cubic feet Vf = volume of soil, cubic feet = Vc – (Ri – Rf ) / 12 x cu. ft.
or in terms of void ratio: Dd = e ( max - e ( max - e) emin) x 100 Where: e emax emin = the volume of voids divided by the volume of solid particle = void ratio in loosest state = void ratio in most compact state.
Warranty Humboldt Mfg. Co. warrants its products to be free from defects in material or workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co., factory replacement of any part or parts of such product, for the warranty of this product please refer to Humboldt Mfg. Co. catalog on Terms and Conditions of Sale. The purchaser is responsible for the transportation charges. Humboldt Mfg. Co.
