Specific gravity (sp gr) measures the ratio of density of the substance to the density of water in a given temperature, (i.e., 4 o C). Top soil is composed of mineral particles, organic matter, water, and air. Soil moisture content calculation can be done using this simple online Soil Moisture / Water Content Calculator. CALCULATIONS 6.1 Calculate the mass of the oven-dried soil (in grams): MA P=+100 100()/( ) Where: M = mass of oven-dried soil, g A = mass of air-dried soil, g P = percent of hygroscopic moisture. Oil gravity differs for each liquid. Now that you have the density of soil solids, you can calculate the specific gravity of soil solids (SG).To find it, divide the density of soil solids by the density of water (Pw), which is 1,000 kg/m3. This calculator converts between various units of salinity. G s = specific gravity (the ratio of the density of the soil to the density of water), no units; I D = density index (relative density), percentage (%) n = porosity (ratio of the volume of voids to the total volume), percentage (%) S r = degree of saturation, percentage (%) w = water content, percentage (%) Unless or otherwise specified specific gravity values reported shall be based on water at 27 0 C. So the specific gravity at 27 0 C = K ´ Sp. It is a dimensionless unit. Soils containing organic matter and porous particles may have specific gravity values below 2.0. Mass of Water in Soil weight. This test method covers the determination of the specific gravity of soil solids that pass 4.75 mm sieve. It is some times required to compare the density of the soil solids to the density of water. Numericals to Calculate Moisture content void ratio. The specific gravity G of the soil = (W 2 â W 1) / [(W 4 â 1)-(W 3-W 2)] The specific gravity should be calculated at a temperature of 27 o C and reported to the nearest 0.01. It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. Top soil is the upper, outermost layer of soil, usually the top 5 inches (13 cm) to 10 inches (25 cm). DETERMINING THE SPECIFIC GRAVITY OF SOILS TXDOT DESIGNATION: TEX-108-E CONSTRUCTION DIVISION 3 â 4 LAST REVIEWED: SEPTEMBER 2014 6. The specific gravity of soil is defined as the unit weight of the soil mass divided by the unit weight of distilled water at 4°C. 6.2 Calculate specific gravity: The calculation should then be: SG = Ps/Pw. Q) A clay sample containing its natural moisture content weighs 0.33 N. The specific gravity of the solid of this soil is 2.70. after oven drying the soil sample weighs 0. This comparison is in the form of ratio and is termed as the specific gravity of the soil. Use the online API to Specific gravity converter to find the Sp gr of an oil by providing the API gravity. In effect, it tells how much heavier (or lighter) the material is than water. Specific Gravity Of Oil Calculator. It is possible to find the amount of water (%) present in the soil based on the mass of water present in the soil and the dry mass of the soil. It deals with the method of test for determination of specific gravity of soils which finds application in finding out the degree of saturation and unit weight of moist soils. 10.2 Calculate the specific gravity at soil solids the test 9.7 If heat has been used, allow the specimen to cool to temperature, Gt as follows: approximately room temperature. rs Ms Gt 5 r 5 (3) 9.8 Thermal EquilibriumâPut the pycnometer(s) into the w,t ~Mrw,t 2 â¦ 2025 N. The volume of the moist sample before the oven drying found by the displacement of mercury is 24. Specific gravity G is defined as the ratio of the weight of a given volume of soil solids to the weight of a equal volume of distilled water. If the room temperature is different from 27 o C, the following correction should be done:-Gâ = kG where, Gâ = Corrected specific gravity at 27 o C Note that relative specific gravity (sg) and conductivity (mS/cm) measurements are inheritly temperature-dependent and that this calculator follows the prevailing standard of assuming a temperature of 25C/77F. The specific gravity of soil solids is defined as the weight of soil solids to the weight of an equal volume of water. gravity at T x 0 C. The specific gravity of the soil particles lie with in the range of 2.65 to 2.85.