Hello Friends, This is Mukesh from Learning Technology. I will tell you in today’s post, Determination of Specific Gravity of Sand in a very easy way.
Contents
Objective of Experiment
This lab is performed to determine the specific gravity of soil by using a Pycnometer or Specific Gravity Flask. Specific gravity is the ratio of the mass of a unit volume of soil at a stated temperature to the mass of the same volume of gas-free distilled water at a stated temperature.
Procedure
1. Determine and record the weight of the empty clean and dry Pycnometer (Wp)
2. Place 10 grams of a dry soil sample (passed through the sieve No. 10) in the Pycnometer. Determine and record the weight of the Pycnometer containing the dry soil (Wps)
3. Add distilled water to fill up to the half or three-fourth of the Pycnometer. Soak the sample for 10 minutes.
4. Apply a partial vacuum or heat the contents for 10 minutes, to remove the entrapped air.
5. Fill the Pycnometer with distilled water (to the mark), clean the exterior surface of the Pycnometer with a clean, dry cloth. Determine the weight of the Pycnometer and contents (Wb)
6. Empty the Pycnometer and clean it. Then fill it with distilled water only (to the mark). Clean the exterior surface of the Pycnometer with a clean, dry cloth. Determine the weight of the Pycnometer and distilled water, (Wa)
7. Empty the Pycnometer and clean it.
ALSO READ
- Determination of Fineness of Cement by Sieving
- Determination of Initial and Final Setting Time of Cement
- Compressive Strength Test of Cement
- Fineness Modulus of a Sample of Fine Aggregate
- Determination of Normal Consistency of Cement
- Specific Gravity Test for Bitumen
- Bitumen Penetration Test – Consistency Test
- Softening Point of Bituminous Materials
- Aggregate Abrasion Value Test
- Flash and Fire Points of Bituminous Materials
Data Analysis
Calculate the specific gravity of the soil solids using the following formula:
Specific Gravity (Gs) = Wo / (Wo + (Wa – Wb))
Wo = Weight of sample of oven-dry soil, g = Wps – Wp
Wa = Weight of Pycnometer filled with water
Wb = Weight of Pycnometer filled with water and soil
Calculations
Sample name: ……………
Sample description: ……………
| Pycnometer or Specific Gravity Flask Number | |
| Wp = Mass of empty, clean Pycnometer (grams): | |
| Wps = Mass of empty Pycnometer + dry soil (grams): | |
| Wb = Mass of Pycnometer + dry soil + water (grams): | |
| Wa = Mass of Pycnometer + water (grams): |
ALSO READ
- Determination of Flakiness and Elongation Index of Coarse Aggregates
- Stripping Value of Road Aggregate by Dynamic Immersion Method
- Determination of Efficiency of a Centrifugal Pump
- Calibration of V-Notch Experiment
- Aggregate Impact Value Test as per IS 2386 (Part-IV) 1993
- Aggregate Crushing Value Test
- Water Content of Soil by Oven Drying Method
