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Mecánica de Suelos (64.08) - Trabajo Práctico Nº1
Parte A - Agregado de Suelos
Ejercicio 1

Wh =
Ws =
Vtot =
γs =

269,5
220,6
138,9
2,69

g
g
3
cm
3
g/cm

a)
γh = ?
γh = (Ws + Ww)/ Vtot = Wh / Vtot
γh = 269,5g / 138,9cm

3

3

=>

γh =

1,94

g/cm

=>

γd =

1,59

g/cm

b)
γd = ?
γd = Ws / Vtot
γd = 220,6g / 138,9cm

3

3

c)
γsat = ?
γsat= (Ws + Vv * γw)/ Vtot
3

Vs = 220,6g / 2,69(g/cm )

γs = Ws / Vs ==> Vs = Ws / γs
==>

Vs =
3

Vv = Vtot - Vs = (138,9 - 82,01) cm =
3

3

γsat = (220,6g+ 56,9cm * 1g/cm )/ 138,9cm

56,9
3

=>

82,01
cm

cm

3

3

γsat =

2,0

3

g/cm

d)
ω= ?
ω = Ww / Ws

Ww = Wh - Ws

Ww = 269,5g - 220,6g

==>

ω = 48,9g / 220,6g

==>

Ww =

48,9

gω=

0,22

ω=

22

%

Mecánica de Suelos (64.08) - Trabajo Práctico Nº1
e)
ω sat = ?
3

3

ω=

0,26

ω=

26

Sr =

0,86

Sr =

86

e=

0,69

n=

ω sat =(Vv * γw) / Ws = (56,9 cm * 1g/cm ) / 220,6g

0,41

%

f)
Sr = ?
3

Sr = Vw / Vv = 48,9 cm / 56,9 cm

3

==>

%

g)
e= ?
3

e = Vv / Vs = 56,9 cm / 82,01 cm

3

==>

h)
n= ?
3

n= Vv / Vtot = 56,9 cm / 138,9 cm

3

==>

Ejercicio 2

Wh =

1425

Vtot =
ω=
γs =

731
0,151
2,65

emax =

g/cm

0,72

emin =

g
3
cm

0,50

3

a)
e= ?

e = Vv / Vs

Ww = Ws * ω
Ww = Wh - Ws

Ws * ω = Wh - Ws
Ws * ( 1 + ω ) = W h

==>

Ws = Wh / ( 1 + ω ) = 1425g / ( 1+ 0,151)

Ws =

1238,05

g

==>

Vs =
Vv =

467,19
263,81

cm
3cm

3

e = Vv / Vs = 263,81 / 467,19

y

3

Vs = Ws / γs = 1238,05g / 2,65 (g/cm )
Vv = Vtot - Vs = ( 731 - 467,19 ) cm

e=

==>

0,56

Dr =

0,71

Dr =

71

3

b)
Dr = ?

Dr = (emax - e ) / (emax - emin)

Dr = ( 0,72 - 0,565) / ( 0,72 - 0,50)

==>

%

Mecánica de Suelos (64.08) - Trabajo Práctico Nº1
Ejercicio 3

Wh =
ω=
γs =

345,2
0,235
2,68g

Probeta

g/cm

D=
H=

3

4,9
10,4

cm
cm

a)
γd = ?

γd = Ws / Vtot

Ww = Ws * ω
Ww = Wh - Ws

Ws * ω = Wh - Ws
Ws * ( 1 + ω ) = W h

==>

Ws = Wh / ( 1 + ω ) = 345,2g / ( 1+ 0,235)
Ws =

279,51

g

Vtot = π * ( D/2 ) * H = π * ( 4,9 cm / 2 ) * 10,4 cm =

196,12

cm

2

2

3

γd = 279,51g / 196,12cm

γd =

=>

3

g/cm3

1,43

b)
e=?

e = Vv / Vs

Ws =

279,51

g

==>

Vs =
Vv =

104,30
91,82

cm
3
cm

3

y

e = Vv / Vs = 91,82 / 104,30

3

Vs = Ws / γs = 279,51g / 2,68 (g/cm )
Vv = Vtot - Vs = ( 196,12 - 104,30 ) cm

e=

==>

3

0,88

c)
Sr = ?

Ww = Ws * ω = 279,51g * 0,235 =

65,69
65,69

3

Vw = Ww / γw = 65,69g / 1 g/cm =
3

Sr = Vw / Vv = 65,69 cm / 91,82 cm

3==>

g
cm

Sr =

0,72

Sr =

72

3

%

Fórmula alternativa: Sr = (γs*ω) / (γw*e)
d)
Sr = Vw / Vv = 0,95

Se supone que el Vv no cambia (el agua desplaza al aire)
3

Vwfin = Sr * Vv = 0,95 * 91,82 cm ==>

Vwfin =
3

Vwagreg = Vwfin - Vwini = (87,23 - 65,69) cm ==>

87,23
Vwagreg =

cm

3

21,54

cm3

Mecánica de Suelos (64.08) - Trabajo Práctico Nº1
e)ω= ?

ω =Ww / Ws

Wwfin=

87,23

g

ω=

==>

0,31

ω=

ω = 87,23 g / 279,51 g

31

%

Ejercicio 4

W pic+W w1 =

281,6

g

W pic+W w2+Ws=

320,3

g

Ws =

62,1

W pic+W w1

g

W pic+W w2+Ws
∆Vw = Vs

a)
γs = ?
3

(Wpic+W w1)+ Ws - (Wpic+W w2+Ws) = 281,6g + 62,1g - 320,3g = ∆W w ==> ∆Vw = ∆W w / 1 (g/cm )
∆Vw = Vs =

cm

23,4

3

γs = Ws/ Vs
γs = 62,1g / 23,4cm

3

γs =

=>

2,65

Ejercicio 5

Wh =
ω=
Vtot =
γs =

1790
0,198
945
2,69

g
3

cm
3
g/cm

a)
γd = ?

γd = Ws / Vtot

Ww = Ws * ω
Ww = Wh - Ws

Ws * ω = Wh - Ws
Ws * ( 1 + ω ) = W h

==>

Ws = Wh / ( 1 + ω ) = 1790g / ( 1+ 0,198)
Ws =

3

γd = 1494,16g / 945cm

=>

1494,16

γd =

1,58

g
g/cm3

g/cm3...