Readymix Concrete

Ready mix concrete in Nigeria

If you are looking for ready mix concrete in Nigeria or outside Nigeria, You are in the right place. First, Let us learn about what this is all about and what you should look out for.

Ready Mix Concrete is concrete that is produced in a batch plant according to a set of engineered mix designs by combining a precise amount of gravel, sand, water, and cement by weight. All aggregates should be washed material with limited amounts of fine or dirt and clay. An admixture is also added to improve the working capacity of the concrete and/or increase the setting time of the concrete to the factor in the time required for the transit mixer to reach the site. The performance of a concrete mix can be modified by the use of admixtures. Admixtures can be used to reduce water requirements, to bring air into a mixture, to improve surface durability.

Readymix Concrete in Nigeria
Readymix Concrete

Ready-mixed concrete is used for construction projects where the construction site is not willing or unable to mix concrete on site. Usage of ready-mixed concrete means The product is delivered finished, on request, in the specific quantity required, in the specific mixing design required. Concrete has a limited life span between batch/mixing and curing. Ready-mix concrete is normally delivered in two ways; first is the barrel truck or in transit mixers. This type of truck delivers concrete in a plastic state to the site.

Second is the volumetric concrete mixer. This delivers the ready mix in a dry state and then mixes the concrete on site.

The properties of mixing fresh concrete without losing homogeneity, transport, placement, compression, and polishing are referred to as “machinability.” Workability in fresh concrete must be protected throughout the casting process. It can be placed in a working concrete with no gaps using a vibrator. Consistency is a measure of workability.

Types of Ready Mix Concrete in Nigeria

There are three types of ready mix concrete depending upon the mixing of the various ingredients as given below:

  1. Transit mixed concrete
  2. Shrink mixed concrete
  3. Central mixed concrete

Transit mixed concrete

It is also called dry batched concrete because all the basic ingredients, including water, are directly charged to the truck mixer. The mixer drum rotates quickly at the charging speed during the loading of the material and then continues to rotate at a normal agitating speed. While being transported towards the destination, the drum revolved at a slow or agitating speed of 2 rpm but after reaching the site just before discharging the material, it revolved at maximum speed of 12 to 15 rpm for nearly 70 to 100 revolution to ensure homogeneous mixing.

Shrink mixed concrete

The concrete is partially mixed in the plant mixer and then balance mixing is done in the truck mounted drum mixer during transit time. The amount of mixing in transit mixer depends upon the extent of mixing done in the central mixing plant. Tests should be conducted to establish the requirement of mixing the drum mixer.

Central-mixed concrete

It is also called a central batching plant where the concrete is thoroughly mixed before loading into the truck mixer. Sometimes the plant is also referred to as wet-batch or premix plants. While transporting the concrete, the truck mixer acts as agitator only. Sometimes, when workability requirement is low or the lead is less, non-agitating units or dump trucks can also be used.

Advantages of Ready Mixed Concrete in Nigeria

  1. There is strict control over the testing of materials, process parameters and continuous monitoring of key practices during the manufacture. Poor control on the input materials, batching, and mixing methods in the case of site mix concrete is solved in a ready-mix concrete method.
  2. There is the speed in the construction practices followed in ready mix concrete by having mechanized operations.
  3. It helps reduce the consumption of cement by better handling and proper mixing. The use of admixtures and other cementitious materials will help to reduce the amount of cement.
  4. The concrete mixture is used with high versatility. 
  5. Cement is saved and the dust caused is reduced as ready mix concrete makes use of bulk concrete instead of bags of cement.
  6. Cement saving will conserve energy and resources.
  7. It ensures less environmental pollution due to Less consumption which results in less production.
  8. A more durable structure is obtained thus increasing the service life and saving the life cycle costs.
  9. It reduces human errors since ready mix concrete has less dependency on human labor thereby reducing intensive labor.
  10. Small or large quantities of concrete as per the specification are delivered timely at the site.
  11. It does not require space for storing the raw materials at the site.it is fast since there is no dismantling or plant erection and no equipment to hire
  12. It reduces noise and air pollution.
  13. Petrol and diesel consumed is less. 

Disadvantages of Ready Mixed Concrete

  1. The transit time from the time of preparation of concrete to the delivery site, will result in loss of workability. This will demand for additional water or admixtures to maintain the workability and the QA/QC engineers are supposed to check the workability through slump tests before using it for construction at site.
  2. Traffic during the transit of concrete can lead to the creation of concrete. This will therefore require the addition of mixtures in order to delay the setting period. But unforeseen traffic is a big problem.
  3. The formwork and layout must be prepared in advance in a large area, as the concrete can be bought in larger quantities.

Ready mix concrete compaines in Nigeria

Below are some of the companies in nigeria that produce high quality ready mix concrete and distribute for different project;

  1. Brook Concrete
  2. Lafarge Africa Plc
  3. Quickmix Nigeria
  4. Concrete batching plant
  5. SPG Readymix Nigeria
  6. Boterhoek
  7. Zeberced
  8. Concrete logistics Ltd
  9. BASF
  10. Dangote Refinery
  11. Kaiser Ltd
  12. Purechem Manufacturing Limited Nigeria
  13. Advanced Concrete Technologies (ACT Nigeria)
  14. Arab contractors
  15. Ready mixed concrete in nigeria
  16. Proportion Construction & Dredge Works Nigeria Ltd
  17. Advanced Concrete Technologies Ltd

Ready-mix concrete tends to be better for large projects that require high volume, in spite of its higher cost. Ready-mix concrete offers a higher quality with minimal variation when concrete is prepared in a plant environment. Another key factor is the location of the project; transport requirements partly determine which type of concrete is most suitable for the project.

3 thoughts on “Ready mix concrete in Nigeria”

  1. Thank you for the description that makes ready mix concrete distinct. It is produced in a batch plant according to a set of engineered mix that has the exact amount of gravel, sand, water, and cement. This is all by weight. This material is an amazing act of science, really. I believe that concrete is the most efficient material for its use and for its cost.

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