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CIVIL ENGINEERING DEPARTMENT

CC304 GEOTECHNICS 1

RELATIVE DENSITY TEST

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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

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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

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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

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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.