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Lab Compilation

The document contains the results of several soil tests including the Atterberg limits, specific gravity, standard compaction, and unconfined compression tests. The Atterberg limits test determined the liquid limit was 21.5%, plastic limit was 14.7%, and plasticity index was 6.8%. The specific gravity test yielded an average specific gravity of 2.7. The standard compaction test found the maximum dry density to be 18.96 kN/m3 at the optimum moisture content of 11.5%. The unconfined compression test was performed to determine the stress-strain behavior and strength of the soil sample.

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100% found this document useful (1 vote)
77 views11 pages

Lab Compilation

The document contains the results of several soil tests including the Atterberg limits, specific gravity, standard compaction, and unconfined compression tests. The Atterberg limits test determined the liquid limit was 21.5%, plastic limit was 14.7%, and plasticity index was 6.8%. The specific gravity test yielded an average specific gravity of 2.7. The standard compaction test found the maximum dry density to be 18.96 kN/m3 at the optimum moisture content of 11.5%. The unconfined compression test was performed to determine the stress-strain behavior and strength of the soil sample.

Uploaded by

Janita Siddiqui
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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  LQUID LIMIT PLASTIC LIMIT

Can No 65 41 91 27
Weight Of Container + Wet Soil (gm): W2 43.12 39.9 37.02 16.84
Weight Of Container + Dry Soil (gm): W3 36.52 35.12 35.45 16.61
Weight Of Empty Container (gm): W1 15.15 15.27 16.24 15.05
Weight Of Dry Soil(gm)= W3-W1 21.37 19.85 19.21 1.56
Weight Of Moisture(gm)= W2-W3 6.6 4.78 1.57 0.23
Moisture Content(ѡ)=[(W2-W3)/(W3-
W1)]X100 30.88% 24.08% 8.17% 14.74%
No. Of Blows 15 22 40 PL=14.7%
  PI=LL-PL=6.8  
ATTERBERG’S LIMIT Date: November
22, 2018

FLOW CURVE
35

30
MOISTURE CONTENT (%)

25
21.5

20

15

Table 1. Table for observations and calculations of Atterberg’s Limits


10

5
10 15 20 25 30 35 40 45

Log N (NO. OF BLOWS)

LIQUID LIMIT (LL) = 21.5 PLASTIC LIMIT=14.7 PLASTICITY INDEX (PI)=6.8

FLOW INDEX (IF) = 42 TOUGHNESS INDEX (TI) = 0.16 LIQUIDITY INDEX (Li) = -0.98 (semi-solid)

SPECIFIC GRAVITY Date: November 22, 2018

TEST NO. 1 2 3
VOLUME OF FLASK 50 50 50

W1(WEIGHT OF EMPTY FLASK) 14.27 14.3 14.28

W2(WEIGHT OF FLASK + SOIL) 23.32 23.3 23.33

W3 (WEIFGT OF FLASK +SOIL+WATER) 70.95 70.94 70.95

W4(WEIGHT OF FLASK+WATER) 65.26 65.27 65.25

α (temperature correction) 0.99864 0.99842 0.99864

TEMPRATURE 22 21 22

GS=α(W2-W1)/(W4-W1)-(W3-W2) 2.69 2.70 2.70

SPECIFIC GRAVITY (Gs) 2.70

Can No
90 56 82
Weight Of Container + Wet Soil (gm):
W2 46 42.02 40.97
Weight Of Container + Dry Soil (gm):
W3 43.48 40.15 39.04
Weight Of Empty Container (gm): W1
14.01 15.32 13.83

Weight Of Dry Soil(gm)= W3-W1


29.47 24.83 25.21

Weight Of Moisture(gm)= W2-W3


2.52 1.87 1.93
Moisture Content(ѡ)=[(W2-W3)/(W3-
W1)]X100 8.55% 7.53% 7.65%
Table 2. Table for determination of Specific Gravity
 NATURAL MOISTURE CONTENT 7.9%≈8%

NATURAL MOISTURE CONTENT

STANDARD COMPACTION Date: November 27, 2018

Blows per layer = 25 No. of layers = 3 Weight of hammer = 2.5 Kg/5 lb. Height of drop=1ft
Weight of sample = 3 Kg Amount of water (6% of 3 Kg) = 180 ml
Weight of mold = 2.529 Kg = 2529g Diameter (d) = 4 inch/10.16 cm Height (h) = 4.5inch/11.43 cm
Volume (V) = 926.20 cm3/ 1/30ft3

assumed water content 6% 12% 18%


 Can No. 90 2 19
Weight Of Container + Wet Soil (gm): W2 39.68 33.33 43.08
Weight Of Container + Dry Soil (gm): W3 38.27 31.37 38.7
Weight Of Empty Container (gm): W1 14.01 14.3 15.35
Weight Of Dry Soil(gm)= W3-W1 24.26 17.07 23.35
Weight Of Moisture(gm)= W2-W3 1.41 1.96 4.38
Moisture Content(ѡ)=[(W2-W3)/(W3-
W1)]X100 5.82% 11.48% 18.76%
Weight of soil + mold: M1 (kg) 4.272 4.504 4.495
Weight of mold: M2 (kg)
2.5 2.5 2.5
Weight of soil in mold: M=M1-M2(kg)
1.772 2.004 1.995
Wet density: γb=M/V (kN/m ) 3
18.69 21.14 21.04
Dry density: γd=γb/(1+w) (kN/m ) 3
17.66 18.96 17.72
Table 4. Table for observations and calculations of Standard Compaction Test

For Zero Air Void Line

γw = 9.8 kN/m3
S = 100%

Moisture Content γd=Gsγw/(1+(Gsw/S))


w (%) (kN/m3)
2.735.812036274 22.74143281
11.4821324 20.42973462
18.75802998 17.46335118
Gs = 2.7
Table 5. Table for zero air void line
COMPACTION CURVE

23

22

21
20.43

20

18.96
19

18

17
0 2 4 6 8 10 12 14 16 18 20

Date: November 27, 2018


Fig 2. Graph for determination of maximum dry density and Optimum Moisture Content of soil

Optimum Moisture Content = 11.5%

Maximum Dry Density = γd max = 18.96 kN/m3

γd max = 120.7 pcf

γd field = 114 pcf =17.9 kN/m3


UNCONFINED COMPRESSION TEST Date: November 27, 2018

Diameter = d = 1.5 in
Area = Ao = πd2/4 = 1.77 in2
Height = Lo = 3.2 in
Volume=V= Ao(Lo) = 5.65 in3
Weight of Soil Sample=W= 188.11 gm
Least Count of DDG = L.C = 0.005 in
Proving Ring Constant = P.R.C = 0.82 lb./in
Bulk Density = ɣb = W/V = .4147lb/0.003269676ft3 = 126.8321387 pcf
Moisture Content = w = 9.8%
Deformati Load Dial Horizontal Unit Area Corrected Total Load Stress Remarks
on Dial Gauge Displacem Strain Correction Area on Sample
Gauge Reading ent Factor
Reading
∆L=DDG ∆L/L = ε 1-ε A = Ao/1-ε F=LDGx σ= F/A
x (L.C of PRC
DDG)

(DDG) (LDG) (in) (in2) (lb) (lb./in2)


0 0 0 0 1 1.76 0 0  
10 3 0.05 0.02 0.98 1.79 2.46 1.38  
20 7 0.1 0.03 0.97 1.82 5.74 3.16
30 16 0.15 0.05 0.95 1.85 13.12 7.11  
40 20 0.2 0.06 0.94 1.88 16.40 8.74  
50 24 0.25 0.08 0.92 1.91 19.68 10.31  
60 28 0.3 0.09 0.91 1.94 22.96 11.82  
70 30 0.35 0.11 0.89 1.98 24.60 12.45  
80 32 0.4 0.13 0.88 2.01 26.24 13.05  
90 34 0.45 0.14 0.86 2.05 27.88 13.61  
100 35 0.5 0.16 0.84 2.09 28.70 13.76  qu
110 35 0.55 0.17 0.83 2.13 28.70 13.50  
120 35 0.6 0.19 0.81 2.17 28.70 13.25  
130 34 0.65 0.20 0.80 2.21 27.88 12.62  
0 0 0 0 1 1.76 0 0  

Date: November 27, 2018


Chart Title Chart Title
Date: November
16
16 27, 2018
13.76
14
14

12
12

10
10

88

66

44

22

0
00 20 40 60 80 100 120 140 160
0 0.05 0.1 0.15 0.2 0.25
Date: November 29, 2018

wt retained in cummulative wt
seive no. dia(mm) gm %age wt retained retained percent passing

#4 4.75 9.1 4.55 4.55 95.45

#10 2 1.7 0.85 5.4 94.6

#40 0.425 3.1 1.55 6.95 93.05

#100 0.15 24.69 12.345 19.295 80.705

#200 0.075 12.64 6.32 25.615 74.385


Date: November 29, 2018

Hydrometer no: 152 H Gs of solids=2.7 Correction Factor for Unit Weight of solids=α=1

Dispersing Agent: Sodium Oxalate Amount: 5gm Wt. of soil. Ws. =50gm Ct=0.40

Zero Correction or Dispersing Agent Correction=Cd =6 Meniscus Correction=1

hydrometer reading corrected for meniscus only


Corrected Hydrometer reading Rc
actual hydrometer reading Ra

corrected %age finer


elapsed time

%age finer

D(mm)
L (cm)
temp

L/t

K
R

0.0388
1 22 45 39.4 78.8 46 8.8 8.8 0.0131 6 58.61538
0.0291
2 22 38 32.4 64.8 39 9.9 4.95 0.0131 5 48.20148

10. 3.4666 0.0243


3 22 35 29.4 58.8 36 4 7 0.0131 9 43.73838
10. 0.0216
4 22 32 26.4 52.8 33 9 2.725 0.0131 2 39.27528

0.0160
8 22 25 19.4 38.8 26 12 1.5 0.0131 4 28.86138
14.7 0.9333 0.0126 10.9940077
15 22 13 7.4 8 14 14 3 0.0131 6 9
4.79 14. 0.4933 3.56562414
30 22 8 2.4 3 9 8 3 0.0131 0.0092 7
0.79 15. 0.2533 0.0065 0.59427069
60 22 6 0.4 9 7 2 3 0.0131 9 1

Date: November 29, 2018

GRADATION CURVE
100

90

80

70

60

50

40

30

20

10

0
10 1 0.1 0.01 0
Date: November 30, 2018

Size of Shear Box = 6x6


Area of Shear Box = 6x6 cm = 0.0036m2
Volume of shear box=72 cm3
Normal Load for Specimen 1= 10lb+8.94 =18.94 lbs =84.226 N

Horizontal Shear
Corrected Area
Horizontal D/R

Load Ring D/R


Normal Stress
Specimen No.

Displacement

Shear Stress
Horizontal

Remarks
Force

1 2 3 4 5 6 8 9 10
Col. 8/Col. 5
Col.6*P.R.C
ΔH= Col. 3

A'=A-bΔH
*L.C

  kPa    
 

23.47436 20 0.0002 0.003588 6 21.88416 6.0993


23.55313 40 0.0004 0.003576 8 29.17232 8.1578
23.63244 60 0.0006 0.003564 10 36.4654 10.2316
23.71227 80 0.0008 0.003552 12 43.75848 12.3194 τmax =
1 16.241 kPa
  23.79266 100 0.001 0.00354 13 47.40502 13.3912
 
  23.87358 120 0.0012 0.003528 14 51.05156 14.4704  
  23.95506 140 0.0014 0.003516 14.5 52.87483 15.0383
24.0371 160 0.0016 0.003504 15 54.6981 15.6102
24.1197 180 0.0018 0.003492 15.5 56.52137 16.1860
24.20287 200 0.002 0.00348 15.5 56.52137 16.2418  
2 35.86845 20 0.0002 0.003588 10 36.4654 10.1632 τmax =
  36.10999 60 0.0006 0.003564 17 61.99118 17.3937 21.33 kPa
36.23198 80 0.0008 0.003552 19 69.28426 19.5057
36.3548 100 0.001 0.00354 19.5 71.10753 20.0869
36.47846 120 0.0012 0.003528 20 72.9308 20.6720
 
36.60296 140 0.0014 0.003516 20.5 74.75407 21.2611
36.72831 160 0.0016 0.003504 20.5 74.75407 21.3339
48.26254 20 0.0002 0.003588 13 47.40502 13.2121
48.4245 40 0.0004 0.003576 16 58.34464 16.3156
48.58754 60 0.0006 0.003564 19 69.28426 19.4400
48.75169 80 0.0008 0.003552 21 76.57734 21.5589
τmax =
48.91695 100 0.001 0.00354 23 83.87042 23.6922
3 28.292207
49.08333 120 0.0012 0.003528 25 91.1635 25.8400 kPa
49.25085 140 0.0014 0.003516 26 94.81004 26.9653
49.41952 160 0.0016 0.003504 26.5 96.63331 27.5780
49.58935 180 0.0018 0.003492 27 98.45658 28.1949
49.76034 200 0.002 0.00348 27 98.45658 28.2921
Date: November 30, 2018

Date: November 30, 2018

30 30

25 f(x) = 0.47 x + 4.54


25
Max. Shear Stress

20

15
20
10 Date: November 30, 2018
5
15
0
20 25 30 35 40 45 50 55

10 Normal Stress

0
0 5 10 15 20 25 30 35

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