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Geotechnical Lab Report on Soil Compaction

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Added on  2020-04-07

Geotechnical Lab Report on Soil Compaction

   Added on 2020-04-07

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Geotechnical Lab Report1Geotechnical Lab ReportsNameProfessor UniversityCity, StateDate
Geotechnical Lab Report on Soil Compaction_1
Geotechnical Lab Report2Geotechnical Lab ReportsProctor’s Compaction TestIntroduction Soil compaction refers to the process whereby the soil particles of a sample are compacted using mechanical compressive means, so as to increase the density of the soil. The moisture content of the soil is the factor used to determine the maximum dry density of the soil sample used, while the variables include the soil type as well as the mass of soil used[ CITATION Ter07 \l 1033 ]. ProcedureThe mass of the mold and the plate were taken, and the soil sample was passed through the 19mm sieve. The sample was then prepared by placing the mold on a flat surface and it was filled into the mold in three layers, each of which was rammed and compacted by 25 blows before the next layer was filled. The assemblage was then weighed and the moisture content of the sampled determined. The setup was then cleaned up, and water was added to increase the moisture content of the sample. The procedure was then repeated until all the results were collected. ResultsMass of moisture container + Wet soil = 1.367kgMass of mould: 5081gVolume of mould: 994.51 cm3
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Geotechnical Lab Report3Average moisture contentTest No. Moisture ContainerNo. Mass of Moisture ContainerMass of Moisture Container+ Wet SoilMass of Moisture Container + Dry SoilMoistureContent (w)(%)22635.7113.7110.44.4444149.9145.34.510437.8113.3110.34.124136.1126.7122.44.912438.7114.31114.520735.8158153.2412539.1145141.13.81343.5150.31464.123936.9166.7161.14.5Average4.31Test No. Mass of mould + soil (m2)Mass of SoilBulk Density of Soil (p)Dry Density of Soil (pd)17026.11945.11.961.8827183.32102.32.112.0237297.82216.82.232.1447283.22202.22.212.11Moisture Container No. Mass of Moisture ContainerMass of MoistureContainer + Wet SoilMass of wet SoilMass of Moisture Container + Dry SoilMass of moisture container +Dry soil 2AverageMass of Dry soilmoistur content Moisture Content (w)(%)R18156.62192.72036.12070.42072.62071.51914.90.06336.33R3555.12654.32099.224792480.72479.851924.70.09079.07R9353.62567.52213.92336.92339.123381984.40.115711.574491.52691.82200.32416.124182417.051925.550.142714.27
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Geotechnical Lab Report4567891011121314151.71.751.81.851.91.9522.052.12.152.2The plot of Dry Density against Moisture contentMoisture content (%)DryDensity(g/cm3)Maximum Dry Density = 2.14 g/cm3Moisture content = 13%Discussion and conclusionThis experiment establishes the optimal M.C of the soil sample at which it will increase its density and thus reach its maximum dry density. The maximum dry density is achieved from the peak point of the curve and the M.C at that point is the optimal M.C of the soil sample. Compaction causes the bulk density of soil to increase as most of the void space is occupied afterthe sample is compacted. The moisture content of the sample however determines this aspect as the water particles are not driven out causing the soil to approach saturation. Adding more water increases the bulk density, however this phenomenon changes as saturation is approached[ CITATION Ter07 \l 1033 ]. Cone Penetrometer TestIntroduction
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