Kamal

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Kamal

  1. 1. Sieve Analysis, Moisture Content & Clay Content Determination<br />Presented By:<br />Kamal Nayan Kumar<br />Roll No: 7607<br />
  2. 2. Sieve Analysis<br /><ul><li> Also known as ‘Gradation Test’
  3. 3. Used to assess Particle Size Distribution.
  4. 4. Gradation affects many properties like bulk density, physical stability and permeability.
  5. 5. Determined using Column Sieve Shaker.
  6. 6. The Grain Size of Sand is expressed by a number called ‘Grain Fineness Number’ (GFN).</li></li></ul><li>Sieve Analysis<br /><ul><li>Procedure:
  7. 7. A standard sieve set with varying mesh size is employed for measuring AFS GFN.
  8. 8. The coarsest sieve is at the top & the finest at the bottom.
  9. 9. The sample is placed at the top sieve.
  10. 10. The whole set is shaken in the sieve shaking machine for a definite length of time.</li></li></ul><li>Sieve Analysis<br /><ul><li>Procedure (continued):
  11. 11. The amount of sand remaining in each sieve is then collected, weighed & expressed as a % of original sample weight.</li></li></ul><li>Sieve Analysis<br />
  12. 12. Sieve Analysis<br /><ul><li>Grain Fineness Number (GFN)
  13. 13. GFN = Total Product</li></ul> Total sum of % collected in each sieve<br /><ul><li>The distribution should show a normal curve with a single peak.</li></li></ul><li>Moisture Content<br /><ul><li>It is expressed in percentage of the original moist sample.
  14. 14. Procedure
  15. 15. 50 gm of sample is taken.
  16. 16. The sample is dried in between 105 to 150oC.
  17. 17. The dried sample is then weighed.</li></li></ul><li>Moisture Content<br /><ul><li>For heating purposes, following are used:
  18. 18. Oven
  19. 19. Forced hot air circulation.
  20. 20. Infrared Lamp.
  21. 21. For direct reading, Moisture Teller are used.</li></li></ul><li>Clay Content Determination<br /><ul><li>Clay is the weathered product of silicate rock containing hydro silicates of alumina.
  22. 22. Clay when added with water gives optimum strength to sand.
  23. 23. However, excess clay may result in loss of permeability.</li></li></ul><li>Clay Content Determination<br /><ul><li>Clay content is measured by AFS clay content test.
  24. 24. AFS defines clay as “all particles finer than 20 micron which fails to settle in distilled water at a rate of 1 inch per minute”.</li></li></ul><li>Clay Content Determination<br /><ul><li>Procedure:
  25. 25. 50 gm of dried sand sample is taken in beaker.
  26. 26. 475 ml of water and 25 ml standard solution of NaOH is added to it.
  27. 27. The solution is stirred for 5 minutes.
  28. 28. The solution is allowed to settle for 10 min.
  29. 29. Lighter particles will be floating & heavier particles will settle.
  30. 30. Take out dirty water.</li></li></ul><li>Clay Content Determination<br /><ul><li>Procedure (continued):
  31. 31. The process is repeated until pure water is obtained.
  32. 32. The remaining sand in the jar is filtered, dried & weighed.
  33. 33. The difference b/w this weight & origlnal weight gives the weight of clay
  34. 34. % AFS Clay Content = Difference</li></ul> Original Weight<br />X 100<br />
  35. 35. Thank you…<br />

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