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  1. 1. Submitted To: Sir Shafiullah Submitted by: Huzaifa Shafiq (797) Muhammad Abdullah Ijaz (798) Afzaal Ahmad (850) Numan Majeed (789) Jamil Alam (801) Umer Perveez (788)
  2. 2. Topic Aggregates
  3. 3. Definition Aggregate is a type of material used in construction, including sand, gravel, crushed tones etc. Purpose of Aggregates  Strength  Weight  Economically
  4. 4. Uses Of Aggregates Concrete Roads Railway
  5. 5. Types Of Aggregates Classification according to formation Classification according to size
  6. 6. Classification according to formatting Natural Aggregates Artificial Aggregates
  7. 7. Natural Aggregates Natural aggregates consists of rock fragments that are Used in their natural state, or are used after mechanical Processing such as crushing, washing, and sizing.
  8. 8. Artificial Aggregates For making special type of concrete we should make special type of artificial aggregates. In these aggregates most are light weight aggregates and heavy weight aggregates
  9. 9. Classification According to Size Fine Aggregates Coarse Aggregate
  10. 10. Fine Aggregates “Fine aggregate” is defined as material that will pass a No. 4 sieve and will, for the most part, be retained on a No. 200 sieve
  11. 11. Types Of Fine Aggregates Sand Stone dust Cinder Surkhi
  12. 12. Sand The first type of fine aggregate is Sand. Sand is little particles of silica. Larger particles are categorized as gravel; smaller particles are categorized as silt or clay.
  13. 13. Types of Sand Pit Sand River Sand Sea Sand
  14. 14. Pit Sand Sand from a pit, as distinct from river or sea sand. When we washed and screened it is good sand for general purposes.
  15. 15. River Sand River Sand obtained from the banks and beds of rivers is also coarse and fine. Coarse sand is best for use in construction works.
  16. 16. Sea Sand This sand is obtained from the shore of sea. The shape of this sand is rounded. Due to water of sea it mixes with different chemicals.
  17. 17. Stone Dust This is the 2nd type of fine aggregate. Stone dust is a finely crushed material used to fill in the spaces between gravel
  18. 18. Cinder Cinder is the slag from a metal furnace. Before use this slag we crushed this so that its size remains in fine aggregate.
  19. 19. Surkhi Surkhi is finely powdered burnt clay and generally made from slightly under burnt bricks.
  20. 20. Coarse Aggregate Course aggregate basic material of the concrete. Crushed stone or gravel used in concrete are called coarse aggregate and it will not, pass when it is dry through a sieve with ¼-inchdiameter.
  21. 21. Types of coarse Aggregates Stone Ballast Gravel Brick Ballast Clinker
  22. 22. Stone Ballast Stone ballast produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers.
  23. 23. Gravel Gravel is a mix of rock pieces or small rocks. These are also called rounded rocks.
  24. 24. Brick Ballast For unimportant works we can use brick ballast in concrete as coarse aggregates. For this purpose well burned bricks are chosen.
  25. 25. Clinker Clinker is uses for produced Portland cement. It may also be combined with other active ingredients or chemical admixtures to produce.