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Classification of Fine Grain Soil Using Sieve Analysis Example Video Lecture | Soil Mechanics - Civil Engineering (CE)

30 videos|77 docs|74 tests

FAQs on Classification of Fine Grain Soil Using Sieve Analysis Example Video Lecture - Soil Mechanics - Civil Engineering (CE)

1. What is fine grain soil and how is it classified using sieve analysis?
Ans.Fine grain soil refers to soil particles that are smaller than 0.075 mm in diameter, including silts and clays. Sieve analysis is a method used to determine the particle size distribution of these soils by passing them through a series of sieves with different mesh sizes, allowing for the classification based on the percentage of particles retained on each sieve.
2. Why is sieve analysis important in civil engineering?
Ans.Sieve analysis is crucial in civil engineering as it helps determine the suitability of soil for construction projects. It provides key information on the soil's grain size distribution, which influences the soil's strength, compaction characteristics, and drainage properties, thereby impacting foundation design and stability.
3. What is the procedure for conducting a sieve analysis on fine grain soil?
Ans.The procedure for conducting a sieve analysis includes: 1) drying the soil sample, 2) weighing the sample, 3) stacking the sieves in descending order of mesh size, 4) placing the soil sample on the top sieve, and 5) shaking the stack for a specified duration. The amount of soil retained on each sieve is then weighed to calculate the percentage passing through each sieve.
4. How do you interpret the results of a sieve analysis for fine grain soil?
Ans.Results from a sieve analysis are typically presented in a particle size distribution curve. The curve helps identify the soil classification according to standard categories like clay, silt, or sand. The percentage of particles passing through the 0.075 mm sieve is critical for differentiating between fine-grained and coarse-grained soils.
5. What are the limitations of sieve analysis for fine grain soil classification?
Ans.Limitations of sieve analysis include its ineffectiveness for particles smaller than 0.075 mm, as these cannot be accurately measured using standard sieves. Additionally, the method does not account for the plasticity or cohesion of fine grain soils, which are important characteristics for engineering applications. Alternative methods like hydrometer analysis may be used to complement sieve analysis for finer particles.
30 videos|77 docs|74 tests
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