Use the template provided to prepare your lab report for this experiment. For gravel to be considered as well-graded, C u should be greater than 4 and C c should be between 1 and 3. Sand isconsidered well-graded, if C u is greater than 6 and C c is between 1 and 3. The values of C u and C c are used to classify whether the soil is well-graded or not. The values of the uniformity coefficient C u and the coefficient of gradation C c can be calculated using the following equations: He values of D 10, D 30, and D 60, which are the diameters that correspond to the percentfiner of 10%, 30%, and 60%, respectively can be determined from the grain-size distributioncurve. Figure 3.7: Particle size distribution curve An example of the grain-size distribution curve is shown in Figure 3.7. The grain-size distribution of the soil sample can be obtained by plotting the percent finer with the corresponding sieve on semi-log graph paper, as shown below. Results and Discussions Sample Data Sheet Stop the sieve shaker and measure the mass of each sieve and retained soil.Ī PowerPoint presentation is created to understand the background and method of this experiment.Ī short video is executed to demonstrate the experiment procedure and sample calculation.Put the stack in the sieve shaker, affix the clamps, set a timer for 10 to 15 minutes, and start the shaker.įigure 3.6: Weighing of each sieve after shaking Pour the soil from above into the stack of sieves and place the cover on it.Weigh the pan and all of the sieves separately.Make sure the sieves are clean, If soil particles are stuck in the openings, use a brush to poke them out.įigure 3.4: Pouring the soil sample at the top of the sieves.The #4 and #200 sieves should always be included in the stack. Place a pan under the last sieve (#200) to collect the portion of soil passing through it. Stack the sieves so that those with larger openings (lower numbers) are placed above those with smaller openings (higher numbers).Obtain a soil sample of about 500 g and determine its mass W 0 (g).Pulverize the soil sample as finely as possible, using a mortar and pestle or a mechanical soil pulverizer.Obtain a representative oven-dried soil sample.įigure 3.1: Weighing some representative oven dried samples Figure 3.2: Washing the sieves before the test.ASTM D6913: Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis.Mortar and pestle or a mechanical soil pulverized.To obtain the grain size distribution curve for a given soil sample.
Information obtained from particle size analysis can be used to predict the soil-water movement if the permeability test is not available.Particle size is one of the criteria used to ascertain whether the soil is suitable for building roads, embankments, dams, etc.Information obtained from the particle size analysis (uniformity coefficient C u, coefficient of curvature, C c, and effective size, D 10, etc.) is used to classify the soil. The data may also be useful in developing relationships concerning porosity and packing.The results are used to determine the compliance of the particle size distribution with applicable specification requirements and to provide necessary data for controlling the production of various aggregate products and mixtures containing aggregates. This test method is used primarily to grade aggregates.standard sieve numbers with their corresponding opening sizes are provided in Table 3.1. The sieves used in this method are made of woven wires with square openings. It is usually performed for sand and gravel but cannot be used as the sole method for determining the grain size distribution of finer soil. Sieve analysis is a method that is used to determine the grain size distribution of soils that are greater than 0.075 mm in diameter. Hydrometer analysis which is used for particle sizes smaller than 0.075 mm in diameter.
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