Workability of Fresh Concrete by Compacting Factor Test
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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)
October 22nd, 2008 at 3:39 pm
what is the difference between compacting factor test and slump test
November 7th, 2008 at 4:27 pm
slump test and compaction factor test are used to determine the workability of concrete but cf is the ratio of partially compacted concrete to fully compacted concrete
November 8th, 2008 at 2:43 pm
i would like you to forward the price of your
Compacting factor apparatus you have in your company to my email address.
November 16th, 2008 at 7:44 am
compaction factor test is very important to get information regarding the workability of concrete. If the concrete is dense it is less workable and that density depends upon shape and size of aggregates. compaction factor lets us to know whether concrete is dense or not and hense workable or not///////
January 19th, 2009 at 6:47 pm
It is important to state that the lower the compacting factor, the lower the workability of the concrete and vice versa. Without this interpretation of the test, your procedure above is incomplete.
March 19th, 2009 at 12:47 am
what type of concrete mixes would use the compaction factor test
March 19th, 2009 at 3:21 pm
SLUMP TEST not only reflects workability but cohessive property of the mix can also be simultaneously evaluated
if performing the test takes place with correct degree of precision required, (in true slump only),thereby ensuring correct Water cement ratio.
May 2nd, 2009 at 10:37 am
i just using this method to check the worability of concrete … i found that almost all the result is 0.97. What is it means? The testing are tested to specimen from G40 Tremie 2, G50 Tremie 1 and G40 Normal Mix…
May 21st, 2009 at 7:39 am
thanks
May 27th, 2009 at 1:09 pm
compacting factor test-is a test that are used to determine the workability of a concrete.(for you to know how a concrete can work then it takes the test of compacting factor test.
whiles slump test-is to determine the consistency of a green concrete.
June 6th, 2009 at 8:21 am
i got 1 question:why is the compaction test more appropriate for dried mixes?
June 7th, 2009 at 7:26 pm
why the compaction test is more appropriate for dried mixes?
June 15th, 2009 at 6:56 pm
workability requirements for concrete in different structural components may be defined as
the ease with which it can be placed without compromise in the strength parameters and
compaction factor test cannot be a correct procedure adopted for evaluating workabiliy.
The matrix representing workability can have cf as one of its elements.
June 17th, 2009 at 11:24 am
why the compaction test is more appropriate for dried mixes?
will the age of the concrete after mixing affect the result?
what is the fixed period suggested in B.S.1881?
July 15th, 2009 at 5:38 pm
1. What is the fixed period suggested in B.S. 1881 ?
2. Can the tests be standardised up to 10 mins ?
July 21st, 2009 at 6:48 am
what factors effect the workability of a concrete mix?
August 18th, 2009 at 2:52 pm
when we come across any foundation making there are many types of soils in different places so how can we know which concrete where to use does it depend on the type of soil
August 22nd, 2009 at 3:51 pm
what is the diff between consitency and flowablity
??
October 27th, 2009 at 11:00 pm
may i ask why is the compaction test more appropriate for dried mixes?
will the age of the concrete after mixing affect the results?
is it necessary 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?
January 5th, 2010 at 11:47 am
all doing the same lab report ma? y all the question is same 1???
January 20th, 2010 at 7:37 am
what is the engineering importance of compactng factor
January 29th, 2010 at 7:48 am
Why the compacting factor test must do after the concrete was mixed?
February 23rd, 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?
March 10th, 2010 at 5:01 am
i got 1 ques-whatdo u mean by high or low workability…….\
March 10th, 2010 at 5:05 am
ques-what is the max grade of concrete used ever and where?