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 Aggregates Aggregates Presentation Transcript

  • 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)
  • Topic Aggregates
  • Definition Aggregate is a type of material used in construction, including sand, gravel, crushed tones etc. Purpose of Aggregates  Strength  Weight  Economically
  • Uses Of Aggregates Concrete Roads Railway
  • Types Of Aggregates Classification according to formation Classification according to size
  • Classification according to formatting Natural Aggregates Artificial Aggregates
  • 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.
  • 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
  • Classification According to Size Fine Aggregates Coarse Aggregate
  • 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
  • Types Of Fine Aggregates Sand Stone dust Cinder Surkhi
  • 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.
  • Types of Sand Pit Sand River Sand Sea Sand
  • 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.
  • 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.
  • 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.
  • 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
  • Cinder Cinder is the slag from a metal furnace. Before use this slag we crushed this so that its size remains in fine aggregate.
  • Surkhi Surkhi is finely powdered burnt clay and generally made from slightly under burnt bricks.
  • 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.
  • Types of coarse Aggregates Stone Ballast Gravel Brick Ballast Clinker
  • Stone Ballast Stone ballast produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers.
  • Gravel Gravel is a mix of rock pieces or small rocks. These are also called rounded rocks.
  • Brick Ballast For unimportant works we can use brick ballast in concrete as coarse aggregates. For this purpose well burned bricks are chosen.
  • Clinker Clinker is uses for produced Portland cement. It may also be combined with other active ingredients or chemical admixtures to produce.