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(8), b) Draw the Diagrammatic sketch of the structure of Illite., c) What is the meant by 'Primary valence bond' and Secondary valence bond'?, Which is more important in soil engineering?, (4), (5), a) Describe the effect of soil type on the compaction characteristics of soils., b) The following are the results of a standard compaction test performed on a sample, of soil:, Water content %, 10, 14, 20, 25, Bulk density, 1.77, 1.98, 2.10, 2.18, 2,16, Plot the water content v/s dry density curve and obtain the optimum wvater content and, maximum dry density. Calculate the water content necessary to completely saturate, the sample at its maximum dry density, assuming no change in volume. Take G 2,7., (15), a) Explain the difference between Boussinesq's and Westergaard's method of, calculating stresses in soil mass due to an external loading. Discuss which method, you would prefer and why?, (10), b) A concentrated load of 30 kN acts on the surface of a homogeneous soil mass of, large extent. Find the stress intensity at a depth of 8m and (i) directly under the, load: (i) at the horizontal distance of 6 m., (10), 1| M-37201, (S9)-240, Scanned by CamScanner