What is Mass Concrete and What are its Advantages and Disadvantages ?


 Whenever mass takes place in certain theory , the whole theory seems to be directly dependent on mass, Their are a lot of meaning of Mass in this world but in the World of Concrete Technology mass is Termed as a Big Amount of Quantity of which we are having no idea in Brain. Whenever you went out for Travelling , You must have seen large Bridges and Dams or Retaining Walls and much more stuffs like that and After having an eye over them , Everybody must have to think that how the construction of such a Large Thing takes Place and Similarly The Process of Concreting of Large Structures Such as Dams, Bridges , Retaining Walls is Known as Mass Concrete and Every Part of it whether it is Batching, Mixing, Transportation, Placing, Compaction as well as Finishing Every Part will be Known as Mass Concrete.

So , Mass Concrete is Nothing But Concreting Whenever it is Done for a Long Time on a Big Structure . Let us Now have some Discussion of all the Terms Related to mass Concrete as Follows:

What is Mix composition in Mass Concrete ?

During the Batching of the Mass Concrete the main motive should be to minimize the quantity of cement and we have to use such materials which helps in Cooling down the Concrete Against the Heat of Hydration. Large sized Aggregates are being used in mass concrete of size up to 150mm . As we First said diminishing the Amount of cement should be their because mass concrete is a Large Concreting Beyond our thinking and to maintain the Strength we have to compromise with water to cement ratio but while minimizing the w/c ratio the Workability of Resulting Concrete will be very Bad But Don't Worry we will use some of the Admixtures to maintain that. But the Most Important thing is that we have to use Low Heat Cement in Replacement of Ordinary Cement , Because the Heat of Hydration emissions are too much in mass concrete But with the Low Heat Cement we will be using Two more things also During the Batching of Mass Concrete The First is Pozzolana , The use of Pozzolana will tend to Proceed the Process of Generation of Silica Gel in Slow motion So Ultimately the Heat of Hydration can be Reduced and Whatever Amount of Heat that is Remaining even after using Pozzolana can be handled by the Second thing and the second thing is Coolant.

Which Admixtures are used in Mass Concrete ?

The Two Admixture are used in this mass concrete , Early in this article we have talked about that mass concrete is very big amount of concrete and such concrete can Increase the amount of Money to be Spent on Project if Cement is used at Normal Proportions , So we have to minimize some part of cement and in place of that we will decrease the Water to Cement ratio and it will Effect the Workability and To Improve that thing we will use the Water Reducing Admixtures . Now the One Problem is Solved But the Bigger Problem is now Affecting the Pumping of Concrete and in Large Structures Pumping plays an Important Role and To Improve Pumping of Mass Concrete we will use Super Plasticizers According to the Guidelines of National Standard Code for Concrete.

Which Equipment are used in Mass Concrete ?

The Following is the List of Equipment being used during the Mass Concreting is as Follows :

  • Batching Plant
  • Immersion Type of Vibrators
  • Concrete Pump
  • Crane
  • Concrete Bucket ( Minimum 20T )
  • Power Trowel
  • Core Drills
  • Concrete Projection Equipment
  • Coolant Mechanism
  • Ice Crusher

How the Curing is Done in Mass Concrete ?

The Curing of Concrete is the most Important Task to be Done Properly Because we all Know that Curing of Concrete is only Responsible factor for the Achievement of the 28 Days Strength and In Case of Mass Concrete The Heat of Hydration is Too High So that the Curing is essential thing If we have to Stop the Crack Development Due to Heat of Hydration. In Mass Concrete , Curing is Done in Two Ways , First of All we will Inject some Pipes Before the Concreting Inside the Reinforcement and After Concreting we will Flow Cool Water or Coolant Through these Pipes and After that we will Start Curing using Conventional Method Also , But These days Curing Compound is Also Applied on the Surface of Freshly Casted Concrete Structure .

What are the uses of Mass Concrete ?

In the Most Largest Projects in the History of Construction Industry , The Mass Concrete Always Takes Place and Its uses are Enlisted as Follows :

  • It is Used in Bridges
  • It is Used in DAM and Retaining Walls
  • It is Used in Flyovers
  • It is used in Metro Railway
  • It is used in Reservoirs
  • It is used in Skyscrapers 

What are the Advantages of Mass Concrete ?

The Benefits of the Mass Concrete is enlisted as Below :

  • The Overall Cost of Project can be Saved
  • Big Structures such as DAM and Bridges are not Possible without Mass Concrete
  • The Shrinkage and Contraction incase of Mass Concrete is Less
  • The Overall Volume Change is Negligible If we Use Mass Concrete in Large Structure in Comparison to Normal Concrete.

What are the Disadvantages of Mass Concrete ?

The Overcoming of Mass Concrete is Listed as Follows:

  • It is a Time Consuming Process Because to Reduce Heat of Hydration we have to Perform Concreting in Small Parts
  • The High Temperature of Mass Concrete can Result into Serious Shrinkage Cracks
  • After some Years the Creep starts to Develop Inside the Mass Concrete
  • A Skilled Labor is Required to Perform Mass Concreting
  • we have to spend Extra money in Admixtures
So, That is All About the Mass Concrete and Mass Concreting , I Hope this Article Helped . If you have any Questions then Contact us by Filling the Contact Form or You can Also Reach to us via Comments Section.

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