For cohesive soil, add de-aired and distilled water to the soil and mix it until it forms a smooth paste.Put approximately 100 grams of air-dried soil into an evaporating dish.Insert the thermometer into the flask with the water to determine the water’s temperature (T= T 1☌.)įigure 2.3: Temperature of the water during the test.Measure the mass of the flask and the water W 1.įigure 2.2: Measuring the weight of pycnometer filled with water.Carefully fill the flask with de-aired, distilled water up to the 500 ml mark (The bottom of the meniscus should be at the 500 ml mark).įigure 2.1: Fill the flask with distilled water.Vacuum system, vacuum pump, or water aspirator.Hot plate or Bunsen burner that is capable of maintaining a temperature high enough to boil water.Thermometer graduated with a division of 0.1☌. ![]() Volumetric flask (500 ml) with a stopper that has a pipe hole.To determine the specific gravity of soil solid at 20☌ using a pycnometer.The specific gravity of soil solids is used to calculate the density of the soil solids.The specific gravity of soil solid is used in calculating the phase relationships of soils, such as the void ratio and the degree of saturation.The specific gravity of soil is usually reported at 20☌. The specific gravity (G s)of a material is the ratio of the mass of a unit volume of soil solids at a specific temperature to the mass of an equal volume of gas-free distilled water at the same temperature.
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