Workability of Fresh Concrete by Compacting Factor Test

Posted in Civil Engineering Tests | Email This Post Email This Post

COMPACTING FACTOR

Compacting factor of fresh concrete is done to determine the workability of fresh concrete by compacting factor test as per IS: 1199 – 1959. The apparatus used is Compacting factor apparatus.

Procedure to determine workability of fresh concrete by compacting factor test.

i) The sample of concrete is placed in the upper hopper up to the brim.
ii) The trap-door is opened so that the concrete falls into the lower hopper.
iii) The trap-door of the lower hopper is opened and the concrete is allowed to fall into the cylinder.
iv) The excess concrete remaining above the top level of the cylinder is then cut off with the help of plane blades.
v) The concrete in the cylinder is weighed. This is known as weight of partially compacted concrete.
vi) The cylinder is filled with a fresh sample of concrete and vibrated to obtain full compaction. The concrete in the cylinder is weighed again. This weight is known as the weight of fully compacted concrete.

Compacting factor = (Weight of partially compacted concrete)/(Weight of fully compacted concrete)

compacting-factor-apparatus

More Entries :
Comments
  • yasin January 20, 2010 at 7:37 am

    what is the engineering importance of compactng factor

  • IZzz January 29, 2010 at 7:48 am

    Why the compacting factor test must do after the concrete was mixed?

  • Arijit Saha February 23, 2010 at 11:26 pm

    Is there any relation or curve between Compacting Factor and Slump? Like if the slump is 100, what will be the corresponding value of compacting factor?

  • anuj March 10, 2010 at 5:01 am

    i got 1 ques-whatdo u mean by high or low workability…….\

  • praveen rathore March 10, 2010 at 5:05 am

    ques-what is the max grade of concrete used ever and where?

  • hema April 22, 2010 at 10:49 pm

    is there any application of compacting factor; like on obtaining some compaction factor the mix is rejected or accepted; or is it just to know how workable the mix is?

  • ReaGen May 29, 2010 at 2:54 am

    what factors effect the workability of a concrete mix?

  • ReaGen May 29, 2010 at 7:04 am

    why is the compaction test more appropriate for dried mixes?

  • Steven May 31, 2010 at 9:42 am

    what is the fixed period suggested in b.s. 1881?

  • pyy June 2, 2010 at 10:02 pm

    what factors affect the workability of concrete mix?
    why is the compaction test more appropriate for dried mixes?
    will the age of the concrete after mixing affect the results?
    Is it nessary to carry out both tests at a fixed time after mixing?
    What is the fixed period suggested in B.S. 1881?
    Can the tests be standardised up to 10 mins?

  • BHUNG June 5, 2010 at 6:31 am

    why is the slump test suitable for site use??

  • Ting June 6, 2010 at 4:24 am

    Why is the compaction test more appropriate for dried mixes?

  • Chiew June 14, 2010 at 2:10 am

    will the age of the concrete after mixing affect the result?

  • abdul rahiman July 5, 2010 at 10:15 am

    we are take concrete mouled after when take test&proudure.

  • yang July 23, 2010 at 11:19 pm

    What is the usefulness and application of the result of this experiment?

  • hina July 31, 2010 at 2:08 am

    workability is decress by the addition of water, how??

  • vinothkumar August 7, 2010 at 5:42 am

    i want exact answer for what is mean by workability of concrete?

1 2

Share Information

What is Civil Engineering

Journals And Softwares

Branches Of Civil Engineering

Civil Engineering Jobs

Knowledge Center

Civil Engineering Universities/Events

Gallery - Civil Engineering Pictures

Search


Author

Top Contributors

Yahoo Group - Civil Engineering Portal

Subscribe to EngineeringCivil.com


Powered by groups.yahoo.com

Recently Added

Civil Engineering Links

Spread the Word