What is the principle of VEE BEE test?
Vee bee consistometer Significance: In this test, we measure the relative effort led by concrete to change from one definite shape to another definite shape by conducting vibration (Conical to cylindrical). This effort is known as Remoulding effort and it is measured in ‘t’ secs. (time) or called as Vee bee Secs.
Why is the VEE BEE test of concrete?
Vee-bee test carries out the relative effort measurement to change the mass of the concrete from a definite shape to the other. That is, as per the test, from the conical shape to the cylindrical shape by undergoing vibration process. The measurement of the effort is done by time measurement in seconds.
What is the Vee Bee apparatus?
Vee bee test machine (apparatus) consists of a vibrating table which is mounted on an elastic support. The vibrator is operated electrically. The length and width of a vibrating table are respectively 380 mm and 260 mm. On the surface of the vibrating table, a cylindrical container is attached using wing nuts.
Is code for Vee Bee Consistometer test?
IS : 1199 – 1959
The method of determining consistency of concrete using Vee-Bee Consistometer is laid down in IS : 1199 – 1959*.
What is compaction factor?
The compacting factor is defined as the ratio of the weight of partially compacted concrete to the weight of fully compacted concrete. It shall normally be stated to the nearest second decimal place.
How do you calculate the compaction factor of concrete?
Weight the cylinder with concrete to the nearest 10 g. This weight is known as the weight of partially compacted concrete (W1). Empty the cylinder and then refill it with the same concrete mix in layers approximately 5 cm deep, each layer being heavily rammed to obtain full compaction.
What is the VEE-BEE time for medium degree of workability?
2-5 sec
Explanation: 2-5 sec is the Vee-Bee time for the medium degree of workability and 10-20 sec is for very low.
What is the size of slump cone?
The American standards explicitly state that the slump cone should have a height of 12-in (300 mm), a bottom diameter of 8-in (200 mm) and an upper diameter of 4-in (100 mm).
How is Slump value calculated?
In case of a shear slump, the slump value is measured as the difference in height between the height of the mould and the average value of the subsidence.
What is compaction ratio?
What Is Compaction Ratio? Compaction ratio is waste industry term that refers to reduction of waste and loose space provided by a compactor. It is a proportion that describes the the volume of compacted waste that can be placed in the same storage space occupied by noncompacted waste.
What is the VEE BEE time for medium degree of workability?