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M sand


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M-sand as a fine aggregate in concrete

Published in: Engineering
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M sand

  1. 1. M-SAND as fine aggregate in concrete PRESENTED BY -– AJAY.B.K 5th SEM Civil engg Bapuji polytechnics Shabanuru 2017-18
  2. 2. What is M-sand ? Manufactured sand is a substitute of river for construction purposes sand produced from hard granite stone by crushing. The crushed sand is of cubical shape with grounded edges, washed and graded to as a construction material. The size of manufactured sand (M-Sand) is less than 4.75mm. And it is also called as ‘ROBO SAND’
  3. 3. Why Manufactured Sand is Used?  Manufactured sand is an alternative for river sand.  Having more good quality than the river sand.  Availability and transportation of M sand.  Cost of construction is less by using this sand.  It is well graded in the required proportion.  Absorption of water by M sand is very less.
  4. 4. Properties of M-sand in concrete  High strength of concrete  Durability of concrete  Workability of concrete  Less Construction Defects  Economy  Eco-friendly
  5. 5. Manufacturing of M-sand
  6. 6. PRIMARY CRUSHING The raw mined material is brought to the crusher plant by rear-dump haulers or front-end loaders. Primary crushing reduces this run of mine rock to a more manageable size. The two types of primary crushers are the compression (jaw crushers and gyratory crushers). JAW CRUSHERS
  7. 7. SECONDARY CRUSHING The secondary unit is basically the same as the primary crusher except it reduces the stone to an even smaller size. It consists of a reciprocating feed hopper, an overcrusher conveyor, a two-deck vibrating screen, a compression crusher, an undercrusher return conveyor, a revolving elevator wheel, a diesel power unit, and conveyors.there are three types crushers.They are :- 1. Cone crusher 2. Roll crusher 3. Hammer mill CONE CRUSHER
  8. 8. VERTICAL SHAFT IMPACTOR (VSI) Working principle of vertical shaft impactor is totally different than horizontal shaft impactor. It has a high speed rotor with wearing resistant tips and main chamber (crushing chamber) is designed in such a way so that speed rotor throw the rocks against the high crushing chamber. In vertical shaft impactor crusher predominant force is the velocity of speed rotor.
  9. 9. VSI
  10. 10. HORIZONTAL SHAFT IMPACTOR (HSI) Horizontal shaft impactor (HSI) crusher consists of hammers that are fixed to the spinning rotor. Hammers are utilized for the breaking of these rocks. Normally horizontal shaft impactor crusher is used for soft materials and materials like gypsum, phosphate, limestone and weathered shales.
  11. 11. HSI
  12. 12. SCREENS Screens are essential to the final aggregate product. The right screen selection will allow uninterrupted production of aggregate. Screens separate crushed rock into two or more particle size ranges. Screens are also used to remove oversized rock before they get into the secondary hopper and to separate out very small particles, also known as fines. VIIBRATORY SCREEN
  13. 13. M sand’s STATUS IN KARRNATAKA
  14. 14. Reference links   content/uploads/2016/02/Crushing_Handbook.pdf   0MjU%3D  39021e61&assetKey=AS%3A368408211279872%401464846770665 