# 2nd Lesson

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### Text of 2nd Lesson

'O Atterberg S : (Solid) (Soil particles)W: (Liquid) (Water)A: (Air) ( Air):: (1) (1) (Void ratio) e (given in decimal)(2) (2) (Porosity) n (given in percent 100%)(3) (3) (Degree of Saturation) S (100%)) () (svV solids of VolumeV voids of Volumee =) () (tvV sample soil of volume TotalV voids of Volumen =% 100) () ( =vwV voids of volume TotalV water contains voids of volume TotalSeee Ve Vnss+=+=1 ) 1 ( S = 0 % S = 100% 0% < S < 100% - - : n = 0.48, NC= 6 : n = 0.40, NC= 8- : n = 0.30, NC= 10- (): n = 0.26, NC= 12 : n = 0.40 - 0.50, NC= c (coordination number) . e n, () min maxmaxe ee eDr=' , ,:maxe:mine: e (. ) (.. ) Water Content w (100%)3 3 3/ 1 / 1000 / 1 m Mg m kg cm gw = = = ((

= = (%) 100M2M2 - M1w ; (%) 100) () (swM solids soil of MassM water of Massw : w=0%, : w>100% ) () (sssV solids soil of VolumeM solids soil of Mass= : 3/ 65 . 2 cm gs = a. (Dry density)b. (Total, Wet, or Moist density)(0%

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##### 2nd chance
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