slump test and vee-bee test
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Slump test
&
VE BE TEST
PRESENTED BY : MAHREEN ZAMIR ABRO
SLUMP TESTWHAT IS A SLUMP TEST ?
A SLUMP TEST IS A TEST OF THE WORKABILITY OF CONCRETE
EQUIPMENT FOR SLUMP TEST :BASE PLATE
TROWEL TO MIX CONCRETE
STEEL TAMPING ROD
SLUMP CONE
RULER
H-3645_lg.jpgWORKABILITY OF CONCRETE THE WORKABILITY OF CONCRETE IS AFFECTED BY THE AMOUNT OF WATER IN THE MIX
TOO MUCH WATER CAN MAKE CONCRETE WEAK
NOT ENOUGH CONCRETE CAN MAKE THE CONCRETE TOO HARD TO WORK WITH
PROCEDUREPlace the cone on a level waterproof base
Place your feet on the holding down lugs
Place 75mm of concrete in the cone and tamp
25times
4. Repeat this action 3 more times until the cone is full and screed off the topCONTINUE :Gently lift cone from the concrete
Area cone beside concrete and put tamping rod
across the top of the cone
Measure down from the bottom of tamping rod of
top of the concrete
4.The measurement is the slump of the concretePic 5 Slump_4.jpgslump-test-0-inch.jpgloadbinary-blog.gifSlump test.pngAVERAGE SLUMPSWhat does a slump test measure ? WORKABILITY
What affects slump ? AMOUNT OF MIX WATER
How many time do you tamp a 75mm layer ofConcrete ? 25 TIMES
VE BETESTWHAT IS VEBE TEST ?
ITS DETERMINE THE WORKABILITY OF FRESHLY CONCRETE BY USING CONSISTOMETER APPARATUS
APPARATUS
.Ve-Be apparatus (consisting of vibrating table, slump cone)Cylindrical container,
Standard tamping rod,
Stop watch and
Trowels.
Vee-Bee ConsistometerVebe ConsistometerPROCEDURE :1. Same as slump test2. After the Slump test we can start ve-be test
3. Switch on the electrical vibrations and start the stopwatch.
Allow the concrete to remold by spreading out in the cylindrical
container. The vibrations are continued until the concrete is
completely remolded, i.e., the surfaces becomes horizontal and the
whole concrete surface adheres uniformly to the transparent disc.4.
Record the time required for complete remolding seconds which
measures the workability expressed as number of Vee-Bee
seconds.vebe_consistometerAdvantages:
1. The Vebe consistometer is a dynamic test and can be used on
concretes that are too dry for the slump test.
2. Test results are obtained directly.Disadvantages: 1. Due to
the need to ensure that all vibration is kept within the test
device, the size of the test device makes the Vebe consistometer
generally unsuitable for field use.
2. The test device only works for lowslump concretes.THANKYOUClick
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