Test No. 1 2 Diameter of specimen, D (cm) Length of specimen, L (cm) 6.35 6.35 6.35 13.2 13.2 3.2 Area of specimen, A (cm) 31.67 31.67 31.67 Beginning head difference, h1 (cm) Ending head difference, h2 (cm) Test duration, t (s) 75.0 70.0 65.0 34.0 25.0 20.0 20.4 19.3 15.4 Volume of water flow 74 68 57 through the specimen, Vw (cm³) 2.303V „L k = (h1-h2)tA (cm/s²) log h2 Average k = k20°c = krc ; %3! 120°C Temperature, T (°C) Variation of nrc/n2o°c Temperature, T (°C) /n20°c 1.135 /n20°C 0.931 15 23 16 1.106 24 0.910 17 1.077 25 0.889 18 1.051 26 0.869 19 1.025 27 0.850 20 1.000 28 0.832 21 0.976 29 0.814 22 0.953 30 0.797
Test No. 1 2 Diameter of specimen, D (cm) Length of specimen, L (cm) 6.35 6.35 6.35 13.2 13.2 3.2 Area of specimen, A (cm) 31.67 31.67 31.67 Beginning head difference, h1 (cm) Ending head difference, h2 (cm) Test duration, t (s) 75.0 70.0 65.0 34.0 25.0 20.0 20.4 19.3 15.4 Volume of water flow 74 68 57 through the specimen, Vw (cm³) 2.303V „L k = (h1-h2)tA (cm/s²) log h2 Average k = k20°c = krc ; %3! 120°C Temperature, T (°C) Variation of nrc/n2o°c Temperature, T (°C) /n20°c 1.135 /n20°C 0.931 15 23 16 1.106 24 0.910 17 1.077 25 0.889 18 1.051 26 0.869 19 1.025 27 0.850 20 1.000 28 0.832 21 0.976 29 0.814 22 0.953 30 0.797
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
FALLING HEAD PERMEABILITY TEST
Transcribed Image Text:Determination of Coefficient of Permeability
Test No.
1
2
3
Diameter of specimen, D
6.35
6.35
6.35
(cm)
Length of specimen, L (cm)
13.2
13.2
3.2
Area of specimen, A (cm)
31.67
31.67
31.67
75.0
70.0
65.0
Beginning head difference,
h1 (cm)
Ending head difference,
h2 (cm)
Test duration, t (s)
34.0
25.0
20.0
20.4
19.3
15.4
Volume of water flow
74
68
57
through the specimen,
Vw (cm³)
2.303V„L
k =
(h1-h2)tA
log (cm/s2)
h2
Average k =
k20°c = kr°c
N20°C
%3D
Variation of Nrc/Nzo°c
Temperature, T
(°C)
Temperature, T
(°C)
23
Nrc
/n20°c
1.135
/N20°C
0.931
15
16
1.106
24
0.910
17
1.077
25
0.889
18
1.051
26
0.869
19
1.025
27
0.850
20
1.000
28
0.832
21
0.976
29
0.814
22
0.953
30
0.797
Transcribed Image Text:Determination of Void Ratio of Specimen
Description of Soil: Sand
Length of Specimen (L): 13.2 cm
Diameter of Specimen (D): 6.35 cm
Temperature: 27°C
Volume of Specimen, V= D²L(cm²)
Specific gravity of soil solids, G,
2.66
Mass of specimen tube with fittings, W, (g)
238.4
Mass of tube fittings and specimen, W2 (g)
965.3
Dry density of specimen, Paw2-W1
(g/cm³)
GsPw
Void ratio of specimen, e =
- 1
Pa
(Note: pw=1g/cm³)
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