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Geotechnics Determination Of Particle Specific Gravity Of A Granular Soil.

833 words - 3 pages

ObjectiveThe objective of this experiment is to determine the particle specific gravity of a granular soil, with predominant granules of Quartz.IntroductionParticle specific gravity is a fundamental property that is required to define any type of soil whether it be granular or cohesive. It illustrates to us the density of the soil particles in relation to the density of water. Thus we can use it to find out other important attributes of the given soil, such as the porosity and the void ratio. It is important to know the particle specific gravity for practical reasons in the construction industry because say for example, structural engineers want to build the foundations for an oil rig on this soil and want to find out if it is safe to build on it or whether the soil will deform under the immense load and maybe give way. It is imperative that the geotechnical engineers find out the particle specific gravity and thus by performing other calculations can say it is or isn't safe to build on the soil.TheoryThe experiment that is going to be carried out will be based upon Archimides principle i.e. when a mass is immersed in water the displaced volume of water is equal to the volume of the mass. So if we know the mass of the soil we will be able to calculate the volume of the soil and hence find the particle specific gravity.ApparatusBelow is a list of the apparatus that are needed to carryout the experiment.- A sample of soil containing Quartz granules.- Glass jar with lid and bung- Distilled water- Digital scaleMethodFirst of all the mass of the empty glass jar with its lid was weighed (M1). Then the glass jar was filled (a third full) with the soil sample and the lid and then weighed, (M2). Thirdly, the glass jar was filled with distilled water (approximately ¾ full) then using the bung the jar was shook vigorously so that the water particles get in to all the voids in between the quartz granules. The jar was then filled to the brim with distilled water and then weighed, (M3). After this the contents of the jar were emptied, making sure no quartz granules were left at the bottom and then the jar was filled to the brim with the distilled water and then weighed with the cover on (M4).ResultsFig 1.0 shows the experimental data that were derived from conducting the experiment.Mass of gas jar + cover (g)M1982.4Mass of gas jar + soil + cover (g)M21862.7Mass of gas jar + soil + water +...

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