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8/11/2019 Relative Density (Habsah)easy
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CIVIL ENGINEERING DEPARTMENT
CC304 GEOTECHNICS 1
RELATIVE DENSITY TEST
Page 1
TITLE: RELATIVE DENSITY
COURSE: GEOTECHNICS
COURSE CODE: CC304
PROGRAME: DKA3A
NAME: HABSAH BINTI YUSOF
MATRIK NUMBER: 11DKA12F1012
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CIVIL ENGINEERING DEPARTMENT
CC304 GEOTECHNICS 1
RELATIVE DENSITY TEST
Page 2
INTRODUCTION
Relative density, or specific gravity is the ratio of the density (mass of a unit volume) of asubstance to the density of a given reference material. Specific gravity usually means relative
density with respect to water. The term "relative density" is often preferred in modern scientific
usage
OBJECTIVE
To determine the relative density of fine soil. Relative density is soil density divide by density at
4C below room temperature.
EQUIPMENT
No equipment picture
1. 3 nos. 100 ml Density Bottle
2. Sieve No. 8 (size 2.36mm)
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CIVIL ENGINEERING DEPARTMENT
CC304 GEOTECHNICS 1
RELATIVE DENSITY TEST
Page 3
3. Mortar rubber pastle
4. Vacuum Desiccators Pump
5. Distilled Water
6. Thermometer
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CIVIL ENGINEERING DEPARTMENT
CC304 GEOTECHNICS 1
RELATIVE DENSITY TEST
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PROCEDURE
1)
Dry out Density Bottle. Then weight bottle with the lid to 0.001 gm (W1) .2) Put the dry soil into the mortar. By using rubber pastle smash the soil to fine texture.
3) Pour the soil into Sieve No. 8 (Opening) 2.36mm.
4) Fill each Density Bottle with 10mg fine soil. Vacuum Dessicator pump.
5) Sprinkle Distilled Water until all the soil totally submerged. Put the bottles into Vacuum
Dessicator Pump for 5 minutes.
6) Beware not to let the Density Bottle become boiling. Loose out the vacuum after all the
pressure trapped inside is released.
7) Fill in each Density Bottle with distilled Water. Then put the bottles back into Vacuum
Dessicator Pump for 5 minutes. Weight the passing soil to 10mg (w3).Obtained the water
temperature (T1C)
8) Empty the bottles and fill in with distilled water. Then put the bottles back into Vacuum
Dessicator Pump for 5 minutes. Weight the passing soil t0 10mg (W4). Obtained the
water temperature (T2C).
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CIVIL ENGINEERING DEPARTMENT
CC304 GEOTECHNICS 1
RELATIVE DENSITY TEST
Page 5
RELATIVE DENSITY (Gs)
() ( )
Table 1: Coefficient of the temperature adjustment,
Temperature ( C)
4 1.0000
15 0.9999
20 0.9982
25 0.9971
30 0.995735 0.9941
DATA
NO 1 2 3
W1= Bottle + Lid , (gm) 24.4 26.1 25.8
W2= Bottle + Lid + Dry soil, (gm) 34 37 35
W3= Bottle + Lid + Soil + Water, (gm) W3 T1 W3 T1 W3 T1
81g 28.2c 82g 28.5c 81g 28.3c
W4= Bottle + Water, (gm) W4 T2 W4 T2 W4 T2
74.8g 29c 76g 29c 75.9g 28.9c
Relative density, Gs 2.824 2.224 2.244
Average Temperature 28.6 28.75 28.6
Coefficient of Temperature
Adjustment,
0.9969 0.9964 0.9969
Soil Specific Gravity= Gs x 2.815 2.216 2.237
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CIVIL ENGINEERING DEPARTMENT
CC304 GEOTECHNICS 1
RELATIVE DENSITY TEST
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DISCUSSION
CONCLUSION
From experiment carried out, decision achieved in relative density in 100 first DensityBottle ml is 2.824, bottle that to two is 2.224 and
bottle that lastly 2.244. Lastly in calculation, find out soil specific gravity all three bottles under
4%. In specific gravity first soil bottle is 2.815, second bottle 2.216 and third bottle 2.237.