Workability of Fresh Concrete by Vee-Bee Consistometer
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VEE-BEE TEST
To determine the workability of fresh concrete by using a Vee-Bee consistometer as per IS: 1199 – 1959. The apparatus used is Vee-Bee consistometer.
Procedure to determine workability of fresh concrete by Vee-Bee consistometer.
i) A conventional slump test is performed, placing the slump cone inside the cylindrical part of the consistometer.
ii) The glass disc attached to the swivel arm is turned and placed on the top of the concrete in the pot.
iii) The electrical vibrator is switched on and a stop-watch is started, simultaneously.
iv) Vibration is continued till the conical shape of the concrete disappears and the concrete assumes a cylindrical shape.
v) When the concrete fully assumes a cylindrical shape, the stop-watch is switched off immediately. The time is noted.The consistency of the concrete should be expressed in VB-degrees, which is equal to the time in seconds recorded above.
what is vb-degrees? how to expressed the value obtain from experiment in vb-degrees?
it is nothing but the time needed by concrete to aquire the cylindrical shape from cone shape
very useful of the web site thanks for you
This site is very much used 4 me
There are several tests for workablity of concrete. Which is the best in terms of being most accurate & dependable?
I think Vee Bee time test is more dependable than CFT and Slump test.
It very interesting for civil engineering to hel find solution for problems
please provide some more information like merits,demerits,significance
The test used to determine the consistency depends on the type of aggregates right?
i hav done B.Tech.(Throgh DDE)recently and also
working in civil Engg. Deptt at thapar university. http://www.thapar.edu
these days visiting in Doha-Qatar for just 2-3Months on visitor’s visa.
This site is really really very good …. thanks for ur Team-work effords.
vksharma
Dear sir,
Could you please send me document on the importance of tests on structure piles and foundation ie pile intergrity test, concrete rebound test etc. Please detail methodology, equipment requirement, data analysis/calculation and report writing guide.
Thank you.
Respected sir,for this information…we will do this test in our lab..Could u also pls send me the standard values of Vee-Bee time for various slump values.
Thank you.
i m doing 2nd year diploma in civil.really its very useful web.
same with me…its very useful..
If a mixture prepared is hard and cannot be compacted, what can i do to improve the workability without effecting the strength of the concrete?
add admixture of air entrainig
I am intresting to ask a little quary that what is a long form of VB
What will happen if the concreting of a RCC structure is done with incorrect proportion other than effect to strength?
Respected sir,
This web site very usefull for to me.please post all lab testing list with relative formulas.
nice to study
Sir please give me the value of its material for make the concreate
Very helpful site..
Nice website for civil engg: student