Ali Syed Abu Rehan Experiment No 2 Field Density by Core cutter method Objective To determine the insitu density of soil by core cutter method Apparatus Spade Knife Moisture can Thermostatically controlled oven ID: 1019357
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1. ByMohammad IsrailMazhar AliSyed Abu RehanExperiment No 2Field Density by Core cutter method
2. ObjectiveTo determine the in-situ density of soil by core cutter method
3. ApparatusSpadeKnifeMoisture canThermostatically controlled ovenCylindrical core cutterSteel rammerSteel dollyBalance
4. ProcedureMeasure the height and internal diameter of the core cutter.Weight the empty core cutter.Clean and level the surface of soil where density is to be determined.Place the core cutter on the soil surface with the cutting edge downward and put the dolly on the top of core cutter. Press the core cutter using the given steel rammer until it penetrates into the ground to its full depth.Remove the soil from around the cutter by the spade.Lift the cutter, remove the dolly, trim off and level the top and bottom surface of the soil sample.
5. ProcedureClean the outside surface of the cutter.Weight the core cutter with soil.Remove the soil from the cutter and take three representative samples from top, middle and bottom zones of the soil in three different moisture cans to determine the moisture content. Take average moisture content.
6. PrecautionsBefore using the sieve set, clean the sieves with brush and ensure that no particle is stuck in the mesh of the sieveShaking should be done in all four directions as well as in circles and when the sieves shaker is on, care should be taken not to let the soil particles come out of the sieves.Take extra care while weighing the soil particles retained on each sieve.For plotting the gradation curve, use 4-cycle semi-log graph paper
7. Observation and resultsS. noParametersSymbolvalueunit1Wt. of Core-CutterW1988.00 gms.2Wt. of Core-Cutter + Wet Soil W22440.00 gms.3 Wt. of Wet SoilWs = W2 – W11452.00 gms.4 Volume of Core-cutter Vc Vc1000.597 c.c.5 Bulk Density of Soilϒs = Ws/Vc1.451 g/c.c.Determination of Bulk Density
8. Observation and resultsS. noParametersSymbolSample 1sample 2Sample 3unit1Wt. of Container Wc8.58.19.0 gms.2Wt. of Container + Wet Soil W18.317.721.2 gms.3Wt. of Container + dry Soil Wd17.817.120.6 gms.4Wt. of Moisture W – Wd0.50.60.6 gms.5Wt. of dry Soil Wd – Wc9.39.011.6 gms.6Moisture content w = w = (W – Wd) /Wd – Wc) *1005.3766.6675.172 %7Dry Density of Soil ϒd = ϒs/( 1+w)0.2280.1890.235 g/c.c.Bulk density of the sample of soil is found to be 0.217 g/c.c. Dry density of the sample of soil is found to be 1.451g/c.c.Determination of Moisture Content