Vee Bee Consistometer Test

By Mukul Yadav|Updated : November 1st, 2022

The Vee bee consistometer test is used to measure the workability of the concrete mix. The workability of a concrete mix can be defined as how much extent concrete is workable. Measurement of workability is important because it tells about the setting time and time available for placing concrete. Many tests are available to determine the workability of the concrete mix, including the vee bee consistometer test.

Vee Bee Consistometer Test PDF [GATE Notes]

The vee bee consistometer test is a laboratory test for determining the workability of the mix. Workability measurement of the concrete is required to know the mobility, compactibility of concrete, placeability of concrete and finishiability of concrete etc. The Vee bee consistometer test is suitable for measuring low workability concrete mix. In this article, the vee bee consistometer test is described in detail.

Table of Content

What is Vee Bee Consistometer Test?

The Vee bee consistometer test is a laboratory test to determine the workability of the concrete mix. Some other tests are also available to determine the workability of the concrete mix, including the Slump test, Consistency test, etc. This test is useful for concrete which has low workability. The slump value for the low workability concrete is limited upto the 50 mm.

In the vee bee consistometer test, the effort of the concrete is measured in terms of the second, also called the vee bee time, or it can also be said that the remoulding effort of the concrete. The workability of the concrete is the measure of the workable nature of the concrete. Vee bee consistometer test measures the energy required to change the shape of a concrete mix from one shape to another.

Vee Bee Consistometer Test Apparatus

The Vee bee consistometer test apparatus includes vibrator plates resting over the elastic supports, A metallic pot, A metallic cone open at both ends and a temper of a rod with a standard size of 20 mm diameter and 50 cm in length. The test apparatus is shown in the following figure.

Vee Bee Consistometer Test Apparatus

Vee Bee Consistometer Test Theory

Vee bee consistometer test is based on the principle that measures the relative effort of the concrete mix to change its shape from one shape to another through the means of vibration. In this test, the concrete shape will change from conical to cylindrical.

This test gives the time for a given mobility of concrete from changing one shape to another. Which relates to the water cement ratio and grading of the aggregates. This time is the complete remoulding time of the concrete mix, which is reported as the vee bee time in seconds.

Vee Bee Consistometer Test Procedure

Vee bee consistometer test is performed in the laboratory to measure the workability of the concrete mix. This test procedure for measuring the workability of the concrete mix is done as per IS 1199:1959. The test procedure is explained as follows:

  • A slump test is performed according to the IS 1199:1959 in the sheet metal cylindrical pot of the consistometer.
  • Before lifting the cone up, the glass disc linked to the swivel arm must be adjusted to note the position of the concrete cone. The glass disc must be moved and positioned right on top of the slump cone in the pot.
  • The glass disc on top of the concrete cone will then be lowered as the cone is raised, and the droop will be indicated on the graded rod.
  • The electrical vibrator shall be switched on, and the concrete shall be allowed to spread out in the pot.
  • The vibration shall then be continued until the whole concrete surface uniformly adheres to the glass disc, and the time taken for this to be attained shall be noted with a stopwatch. The time is recorded in seconds.

Uses of Vee Bee Consistometer Test

Vee bee consistometer test can be used to measure the workability, mobility, placeability, finishability etc., of the concrete. Vee Bee Consistometer to determine durability is a test on performed for the concrete mix, which also measures the workability of the concrete. This test can measure the workability of concrete with a low slump value upto the 50 mm.

Vee bee consistometer test is suitable for finding the workability of a low-workable concrete mix. The workability of concrete by the vee bee consistometer test is measured by measuring the vee bee time in seconds. This time corresponds to changing the concrete mix's shape from a conical to a cylindrical shape.

Vee Bee Consistometer Test: Advantages and Disadvantages

Vee bee test for the determination of the workability of the concrete mix can be used based on the quality and ingredients of the concrete mix. It has some advantages and disadvantages because it can be used to measure the workability of the concrete.

Advantages

  • It can measure the workability of the concrete mix in its dry state.
  • It can be used for concrete having a low water-cement ratio.
  • It can measure the compactibility of the concrete mix and workability of the concrete mix.

Disadvantages

  • The vee bee apparatus is quite expensive in comparison to other test apparatus, and it also requires electricity.
  • This test can also be used for the low workable concrete mix.
Other Important GATE Notes
SteelZero Force Member In A Truss
Functions Of The Network LayerTransverse Loading
Geometric Design Of HighwaysMoment Area Method
Macaulays MethodImpact Load
Impulse An MomentumUniformly Varying Load

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FAQs on Vee Bee Consistometer Test

  • Vee bee consistometer test is a laboratory test that can be used to measure the workability of the concrete mix that is less workable.

  • Vee bee consistometer test is used to measure the workability of the concrete mix having a low water cement ratio. Such concrete mixes are the very low workable concrete mix.

  • Vee bee consistometer test is used to measure the workability of concrete that is very low workable. Such mix has a very low value of slump, about 50 mm.

  • IS code 1199:1959 describes the procedure for measuring workability by different methods. These methods are the slump method, CF test method, Vee bee consistometer method etc.

  • Slump test, Compaction factor test, Vee bee consistometer test, Flow test, etc., can be used to measure the workability of the concrete mix.

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