QUESTION ONE A particle size distribution curve is given in the figure below Classify the soil using (a) USCS and (b) AASHTO methods. The LL = 46 % and the PL = 35% for soil material passing the NO 40 sieve 100 90 80 70 60 50 40 30 20 10 0.001 0.01 0.1 10 Grain Size in mm QUESTION TWO Define Specific charge or Specific surface What is Isomorphous substitution What type of bonds exists in clay soils? % Finer by Weight

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