A Sample of Wet Soil Has a Volume of 0

1. A sample sample of of wet soil has a volume volume of 0.0192 0.0192 m 3 and a mass of 32 kg. When the sample soil dried out in an oven, its mass reduces to 28. kg. determine i! "ulk densit# ii! Water content iii! $r# densit# iv! %aturated de densit# v! &oid ratio vi! 'orosit# vii! $egree of saturation (ake the speci)c gravit# of solids 2.*. 2. 'rove that that the degree degree of saturation of a partiall# partiall# saturated saturated soil can can +e epressed as w S=  p w ( 1+ w ) − 1  p G 3. A full# saturated saturated cla# cla# sample has has a mass of 130 gm gm ad has a volume of of *3 cm . (he sample mass is 10 gm after oven dr#ing. Assuming that the volume does not change during dr#ing, determine the following i! %peci)c gravit# of soil solids ii! 'orosit# iii! &oid ratio iv! $r# densit# -. A sample of of soil has has a volume volume of 1 liter liter and a weight of 1/. . the the speci)c gravit# of the solids is 2.*8. f the dr# unit weight of the soil is 1-.8 m3.determine a! water content +! void ratio c! porosit# d! saturated unit weight e! su+merged densit# and f! degree of saturation. . A saturated soil sample sample encountered encountered in a deep ecavation ecavation is found to have a water content of 234.$etermine its porosit# and +ulk unit weight. (ake 562./. *. A sand# soil soil has a natural water content content of 2/.4 2/.4 and +ulk unit weight of 3 19. m . (he void ratios corresponding corresponding to the densest and loosest state are 0.1 and 0.8/.)nd the relative densit# and degree of saturation for this soil. (ake 562./. 562 ./. /. A soil soil sample sample has a +ulk +ulk unit weight weight of 19.* 19.* m 3 at the water content of 104.$etermine the void ratio, percentage air voids and degree of saturation of this sample. (ake 562./. 8.  (he la+orator# la+orator# test results results of a sand are e

  0.91, e min 0.-8, and G s 2.*/.What would +e the dr# and moist unit weights of this sand when compacted at a moisture content of 104 to a relative densit# of *47 9. A moist soil has a void ratio of 0.*. (he moisture content of the soil is 1-4 and 5 s62./.$etermine s62./.$etermine i. porosit# ii. $egree of saturation. iii. $r# unit weight. 10. An undistur+ed specimen of cla# was tested in la+orator# and the following result were o+tained ma

Wet mass6210 gm ven dr# mass61/ gm %peci)c gravit# of solids 62./  What was the total volume of the original undistur+ed specimen assuming the specimen was 04 saturated. 11. A soil deposit to +e used for construction of an earth em+ankment has an average dr# densit# of 1.*2 gmml. if the compacted em+ankment is to have an average dr# densit# of 1./2 gmml, determine the volume of soil to +e ecavated for 1000 m3em+ankment.the water content of the soil in the +orrow pit is 104. 12. 'rove that water content w! of the partiall# saturated soil can +e epressed as Gm 1

w=

(

( )

−

G

Gm )−1 s

13. A sample of cla# having a mass of */ gm was coated with para:n wa. (he com+ined mass of the cla# and the wa was found to +e *82 gm. (he volume was found +# immersion in water as 3- ml. the sample was then +roken open and the water content and the speci)c gravit# of solids were found to +e 14 and 2./ respectivel#. ;alculate the +ulk densit# of soil, its void ratio and degree of saturation. (ake speci)c gravit# of wa as 0.89. 1-. %how that

a . γ sat = γ d + n γ w b . γ sat =n ( c . γ d = d .G s=

γ sat  γ d− wsat  ( γ sat − γ w )

1

+w w

eSγ w

( 1+ e ) w

) γ w

;hapter 3.