no penalty solid
no penalty solid

No fines concrete is one type lightweight concrete, As the name indicates, it is a solid mixture without fine aggregates or sand. This type of concrete consists only of water, cement and coarse aggregates.

No Fines Important Notes on Concrete

  1. generally coarse aggregates Passing 20mm sieve and retaining on 10mm sieve Used for the production of this type of concrete.
  2. Aggregate to Cement Ratio Concrete generally varies without penalty 6:1 To 10:1,
  3. water cement ratio placed within the range of 38 to 0.52, The water cement ratio should be chosen very carefully keeping in mind the consistency of the mixture.
  4. Density solid without penalty normal set vary from 1600 to 1900 kg/sq m3, When light weight set Density used can be as low as 300kg/m3,
  5. pressure force No fines varies between concretes 4 MPa to 14 MPa,

The uses of this type of concrete are as follows:

  • external load bearing wall construction
  • small retaining wall construction
  • as damp proof material
  • construction of temporary structures

Benefits of Concrete No Fines

  1. no penalty solid performance low drying shrinkage compared to ordinary concrete
  2. The movement of water is negligible due to capillary action In this type of concrete.
  3. Due to its light weight nature it is used in light weight concrete construction work.
  4. thermal insulating characteristic no fine is concrete Better compared to conventional concrete. That is why it is used in the construction of exterior wall.
  5. produce concrete results like this saving material requirement, Due to the absence of fine aggregates or sand, a small amount of cement is required to produce 1 square meter3 No fine concrete.
  6. The density of this type of concrete is about 25 to 30% less than that of conventional concrete. So it puts less pressure on the formwork.
  7. Separation properties of this type of concrete are very low. Therefore it can be dropped from a great height without the danger of separation.
  8. No special equipment is required for compaction of this concrete. Complete compaction can be achieved by simple rodding operation.

No Fines Concrete Limits

  1. Due to the absence of fine aggregates, this type of concrete lack of harmony While in the plastic state. That’s why it takes a long time to remove the formwork.
  2. this is more permeable compared to conventional concrete. Therefore walls built without fine concrete require an additional coat of mortar from a durability point of view.
  3. In general Reinforcement is not recommended In this type of concrete. However, if reinforcement is required to be used, apply a thin layer of cement paste over the reinforcement before use. This will improve the bond of the steel with the concrete and also improve its resistance to corrosion.
  4. there is no standard test method (eg deceleration or compaction factor) test to measure stability or practicality No fine concrete. Its practicality can be judged only by proper visual inspection and trial and error method.

Er. Mukesh Kumar

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Er. Mukesh Kumar is Editor in Chief and Co-Funder at Civil Engineering Website. Mukesh Kumar is a Bachelor in Civil Engineering From MIT. He has work experience in Highway Construction, Bridge Construction, Railway Steel Girder work, Under box culvert construction, Retaining wall construction. He was a lecturer in a Engineering college for more than 6 years.