Specif gravity.ppt 2 copy
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Group 3 conducted a soil lab with 5 members. The experiments included determining water content by oven dried method, sieve analysis, modified proctor test, and specific gravity of soil solids. To determine specific gravity, a pycnometer was filled with dry soil and water, vacuumed to remove air, and weighed. The specific gravity was calculated using a formula that divides the weight of soil by the difference in weight between the pycnometer filled with soil and water, and the pycnometer filled just with water. Specific gravity is an important property used to determine void ratio, porosity, and degree of saturation. The results can help determine the type of soil as sand, silt or clay based on the specific gravity range
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Specif gravity.ppt 2 copy
- 1. Group No 3
- 2. Soil lab Members Of The Group: 1. Umer Faiz (Group leader) 2.Shehzad Khan 3.Jawad Khan 4.Kamran Khan 5.Jehangir Khan
- 3. List Of Experiments 1.Determine the water content by oven dried method 2.Sieve Analysis test 3.Determination of Maximum dry density and moisture content by modified proctor test 4.To find the specific gravity of soil
- 4. Exp: Determination of specific gravity of soil solids Definition/purpose: Specific gravity is the ratio between density of a substance to the density of a liquid at standard temperature Mathematical Formula: Gs= γliq/γwater
- 5. Application Specific gravity of soil is an important property and is used to determine 1. Void ratio 2.Porosity 3.Degree of saturation (If Density and Water content are known)
- 8. 3. Balance
- 11. Procedure 1. Determine and record the weight of a clean pycnometer (M1)
- 12. 2. take dry soil sample passed through sieve no 4 in pycnometer and determine the weight of pycnometer containing dry soil (M2)
- 13. 3. Add distilled water to fill about half to ¾ of pycnometer soak sample for 10 mintues
- 14. 4. Apply the partial vacum to the contents For 10 intues to remove the entrapped air
- 15. 5.Fill the pycnometer with distilled water to the mark and determine weight of pycnometer and its contents
- 16. 6.Empty the pycnometer and then fill with distilled water upto the mark and determine the weight of pycnometer and distilled water (M4)
- 17. Analysis Apply the Formula: Gs = M2 - M1/(M2 - M1) – (M3 - M4)
- 18. Results Soil Type Range of Specific Gravity Sand 2.63-2.67 Silt 2.65-2.70 Clay/Silt Clay 2.60-2.90
- 19. The results thus obtained from the above experiments can help us to determine the type of the soil
- 20. THANK YOU