![]() ![]() The weight of the soil solids in kN that is required to form this sample is:ĭetermine the total volume of borrow material in m^3 with a void ratio of 1.25 that is required to construct a embankment of total volume 200,000 m^3 at a void ratio of 0.80.ī) determined by dividing the discharge velocity (numerator) by the void ratio of the soil (denominator)Ĭ) the product of the hydraulic conductivity times the hydraulic gradientĭ) determined by dividing the discharge velocity (numerator) by the porosity of the soil (denominator)ĭetermined by dividing the discharge velocity (numerator) by the porosity of the soil (denominator)Ĭompaction rollers equipped with Intelligent Compaction systems can assess and quality control a higher percentage of compacted earthworks compared to using a nuclear density gauge. After compaction 6% of the total volume of the sample is air. Soil with a G(s) of 2.71 and a water content 16% is compacted to produce a cylindrical sample of volume 8.619e-5 m^3. If 0.002kN of water are added to the sample, the moisture content of the sample will be:ĭ) Need a value of G(s) of the soil to solve this problem. a lower hydraulic conductivity because the clay clods/aggregates can be remolded.Ī moist soil sample weighing 0.02kN has a moisture content of 33.0%. higher slope of the stress- strain curve)ĭ) a lower hydraulic conductivity because the clay clods/aggregates can be remolded. the porosity of this soil is 37.5%Ĭompacting a cohesive, clayey soil on the wet side of optimum moisture content contrasted with the dry side of optimum moisture content will give the soil: (choose 2)Ĭ) higher stiffness (i.e. One process that holds water molecules to a clay mineral particle surface is the attraction of dipolar water to the negatively charged clay mineral particle surfaceįor a clay soil compacted with a given compactive effort, the maximum dry density tends to decrease as plasticity index of the clay soil decreases.Ī soil has water content of 20% degree of saturation of 90% and specific gravity of soil solids of 2.70. The relationship between zero air voids dry unit weight and moisture content depends on the compactive effort applied to the soil.įor a given soil, the modified Proctor compaction curve will have a higher optimum moisture content and a higher maximum dry unit weight than the standard Proctor compaction curve.įor clays, as specific surface area decreases, the liquid limit increase. In a dispersed structure clay mineral particles form parallel, face- to- face orientation. Transportation and deposition of soil particles by windĬlay minerals are formed by the movement and crushing action of glacier ice.Ĭlay soils have plastic properties because they contain a high percentage of fines (particles smaller than the #200 sieve (0.075mm))Ĭlay minerals are formed by chemical weathering of rock minerals ely:Īn Aeolian soil is a soil which is formed by:Ī) deposition of soil particles along or a base of a slope by gravityī) transportation and deposition of soil particles by windĬ) erosion and weathering of parent materials in placeĭ) deposition by flowing water in a stream or river A clay soil has a liquid limit of 60%, a plastic Limit of 20% and a natural, in situ water content of 25%, The clay in the natural, in situ state would lik. ![]()
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