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Artificial Sand Making Machine
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      The Civil engineers, Architects , Builders, Contractors agrees that the natural sand, which is available  today, is deficient in many respect. It is not having the fine particles, in proper proportion as required.  Presence of  other impurities such as coal, bones, shells, mica and silt etc makes it inferior for the use in    cement concrete. 
The decay of these materials, due to weathering effect, shortens the life of the work. Now a days Government have put ban on lifting sand from River bad. 

      Due to lifting the sand from river bed reduces the seepage of rain water in ground which result in lower level of ground water. Other effect is the water flowing in the river is more exposed to Sun, so more evaporation. The rain water is filtered due to sand in the river. Lifting of sand from river- bed, so no filtration of water.

      Vastu Shatra: Now a days Vastu Shatra is followed by so many persons while constructing house. As per Vastu shastra the Building material must be free from traces of human body or animal body. The River sand contains Bones of human beings and animals. The shells are also type of bone. It is not easy to take out all such things present in the river sand. The best solution for this is to use Artificial crushed sand of good quality.

Only the long term solution is manufactured sand.  The manufactured sand must have cubical particles or spherical particles. Flaky  particles increases  voids over cubical or spherical particles about 5 to 6 percent more. So the process of manufacturing should be such that it should give Cubical particles. Fine aggregates are manufactured by using different types of machines. Roll Crusher, Hammer Crushers, Cone Crushers and V.S.I. crushers are generally used to manufacture sand.  Fine aggregates manufactured by Roll crusher and Cone crushers are flaky and sharp. Which is difficult to use. 

Sand manufactured by Vertical Shaft Impactor is of cubical shape. Such sand can be used for all types of construction work, Concreting, Plastering etc and is better substitute to river sand.
   
 
   Followings are the actual result of Concrete Designed with river sand and Artificial sand.
   proportions are by weight Mix Design M 15
   M 15 concrete is designed for River sand and artificial sand. Results are as follows:

   1) With using River sand :
         • Cement one bag ……….. 50 Kg
         • Sand 135 Kg
         • Agg. 20 mm 135 Kg
         • Agg. 12 mm 67.5 Kg
         • Water 27.5 ltrs

   Strength achieved after 7 days curing………..174.81 Kg/Cmsq.

   2) With using Artificial sand : Proportions are by weight
         • Cement one bag 50 Kgs
         • Sand (artificial m/c made) 125 Kgs
         • Agg. 20 mm 137 Kgs
         • Agg. 12 mm 75 Kgs
         • Water 27.5 Ltrs

   Strength achieved after 7 days curing …….186.67 Kg / Cmsq.
   Similar test is performed with higher grade Concrete Mix Design M 55
   M 55 concrete is designed for River sand and artificial sand.
   Results are as follows:
   1) With using River Sand : All proportions are by weight
         • Cement 50 Kg
         • River Sand 75 Kg
         • Agg. 20 mm 75 Kg
         • Agg. 12 mm 37.5 Kg
         • Water 19 Ltrs

    Strength achieved after 7 days curing …….441 Kg per Sq.cm

   2) With using Artificial Sand : All proportion are by weight:
         • Cement 50 Kg
         • Artificial Sand 70 Kg
         • Agg. 20 mm 80 Kg
         • Agg. 12 mm 35 Kg
         • Water 19 ltrs

   Strength achieved after 7 days curing …….468.14 Kg per Sq.cm

   Conclusion:

   From the above design results it can be observed that the strength of Concrete increases    with Artificial Sand. More over the presence of Fines in artificial sand increases the    workability and gives more sound Concrete. The slabs, using Artificial sand, are more leak    proof then by river sand.

 
      Rotopactor is a most economical machine for manufacturing artificial sand.  In this machine the stone are thrown at a high speed, those particles colloid with each other and shatter in cubical particles. A Anvil ring, Shelf ring (pigeon hole ring) are provided to get the particles edges grounded.   In our machine a specially designed anvil ring is provided which uses the residual kinetic energy in the particle and makes it revolve and role and rub with each other in a circular path. This makes the shape of the particles very good, and smooth.

      The sand manufactured can be of very fine to course grade as  per the requirement of the work. The sand manufacturing process is dry.  The process requires very less water that too only for settle down the  residual  dust particles in colloidal state emitted from the outlet. This machine can allows, slight  wet grit for crushing. Other machines Cone crusher can not use wet material.
 

For achieving better results each and every particle of the artificial sand should be cubical. This can not be achieved by Compression Crushing. The Jaw crusher, Roll Crusher, or Cone Crusher uses the principle of Compression Crushing. Hence with the help of these machines sand can not be manufactured can not have cubicle particles. Hammer crusher or H.S.I. may give Cubical particles to satisfactory level. The wear cost of these machines is very high. It is say about four to five times more that of VSI crusher.

Rotopactor is a most economical machine for manufacturing artificial sand. In this machine the stone are thrown at a high speed, those particles colloid with each other and shatter in cubical particles. Anvils or Shelf ring (pigeon hole ring) are provided. A rubbing action of particles over pigeon ring, grounds the sharp edges and make the texture smooth.

In our machine a specially designed anvil ring is provided which uses the residual kinetic energy in the particle and makes it revolve and role and rub with each other in a circular path. This makes the shape of the particles very good, and smooth.

The sand manufactured can be of very fine to course grade as per the requirement of the work. The sand manufacturing process is dry. The process requires very less water that too only to settle down the residual dust particles in colloidal state, emitted from the outlet. This machine can allows, slightly wet grit for crushing. Other machines, Cone crusher, H.S.I. could not use wet material, as it clogs the machine.

 
     
   
 
 
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