How do you calculate hydrometer?
How do you calculate hydrometer?
Insert the hydrometer in the measuring cylinder containing about 700 ml of water. Take the readings of the hydrometer at the top and bottom of the meniscus. The difference between two readings is taken as meniscus correction (Cm) which is a constant for a hydrometer.
How do you perform a hydrometer analysis of soil?
The first step when performing a hydrometer analysis is to take the soil sample and mix it into a slurry with the dispersing agent. Then, the slurry is placed into a graduated cylinder and water is added until the combination reaches a specified volume. The water and the slurry are then thoroughly mixed together.
How do you calculate effective depth in hydrometer analysis?
Measure and record the distance (h) from the neck to the bottom of the bulb as the height of the bulb. Find out the Volume (Vh) of the bulb and area an of the jar (A). HR = Effective depth.
What is hydrometer used in soil mechanics?
Hydrometer method is used to determine the particle size distribution of fine-grained soils passing 75 µ sieve. The hydrometer measures the specific gravity of the soil suspension at the center of its bulb. The specific gravity depends upon the mass of solids present, which in turn depends upon the particle size.
What is hydrometer test of soil?
The hydrometer analysis of soil, based on Stokes’ law, calculates the size of soil particles from the speed at which they settle out of suspension from a liquid. Results from the test show the grain size distribution for soils finer than the No. 200 (75µm) sieve.
Is code for hydrometer analysis of soil?
GRAIN SIZE ANALYSIS OF SOIL BY HYDROMETER, IS: 2720 (Part 4): 1985. Scope: To determine grain size of soils fraction passing through 75 micron IS sieve.
What are the different types of hydrometers?
Note that the three main types of hydrometers available on the market are triple scale hydrometer, thermohydrometers, and precision hydrometers.
Is code for GSA of soil?
GRAIN SIZE ANALYSIS OF SOIL BY DRY SIEVING METHOD, lS: 2720 (Part-4): 1985. Scope: To determine grain size of soils fraction retained on 4.75 mm IS sieve by dry method.
What is K in hydrometer analysis?
The value K is a function of temperature and particle density and can be obtained from the Table 4 provided. The value of effective depth (L) for the ASTM 152H hydrometer can be found on Table 5.
What is the principle of hydrometer?
A hydrometer is an instrument used to determine specific gravity. It operates based on the Archimedes principle that a solid body displaces its own weight within a liquid in which it floats. Hydrometers can be divided into two general classes: liquids heavier than water and liquids lighter than water.
What is the importance of hydrometer analysis?
Hydrometer analysis is essential for obtaining the complete particle size distribution of such soils. Particle size distribution obtained from sieve analysis may be combined with the data from a hydrometer analysis to produce a complete gradation curve.
How do you use a hydrometer in soil analysis?
The Hydrometer Analysis of Soil The hydrometer analysis of soil, based on Stokes’ law, calculates the size of soil particles from the speed at which they settle out of suspension from a liquid. Results from the test show the grain size distribution for soils finer than the No. 200 (75µm) sieve.
What is particle size analysis (hydrometer method)?
1 Particle Size (Hydrometer) DATE: SEPT 2004. Particle Size Analysis (Hydrometer Method) 1. Application. The percentage of sand, silt and clay in the inorganic fraction of soil is measured in this procedure. The method is based on Stoke’s law governing the rate of sedimentation of particles suspended in water.
How do you write a report on a hydrometer?
Your report should include the following: Analysis of the test results – Complete the table provided and show one sample calculation. Draw the grain size distribution curve for the data from the hydrometer analysis only and the combined grain-size distribution curve.
What is hydrometer test?
Hydrometer test is carried out to quantitatively determine the Particle/Grain Size Distribution for soil particles of size smaller than 75 micron. 2.Apparatus Required Fig. 1: Hydrometer Calibrated at 27°C, range of 0.995 to 1.030 g/cc, graduation lines at interval of 0.0005; in conformity with IS-3104: 1965.