What is the use of compaction factor?
The compacting factor test is designed primarily for use in the laboratory but it can also be used in the field. It is more precise and sensitive than the slump test and is particularly useful for concrete mixes of very low workability and normally used when concrete is to be compacted by vibration.
What is the purpose of compaction factor test?
The compaction factor test is carried out to measure the degree of workability of fresh concrete with regard to the internal energy required for compacting concrete thoroughly. The compacting factor test is used to find out the low workability of concrete.
What are the apparatus needed in the conduct of the compaction factor test?
Apparatus. Compaction factor apparatus consists of trowels, hand scoop (15.2 cm long), a rod of steel or other suitable material (1.6 cm diameter, 61 cm long rounded at one end ) and a balance.
How many hoppers consists the compaction factor test apparatus?
Compaction factor test Apparatus:- As per IS1199:1999 Compaction factor test apparatus consists of two conical hoppers and a bottom cylinder which is arranged as shown in below fig, steel rod of 1.6cm Diameter with a length of 61cm is used to tamp the concrete and a weight balance is used to weight the concrete.
How is compaction factor calculated?
By dividing the value of partially compacted concrete by the value of fully compacted concrete, the compaction factor is calculated and to the nearest second decimal place, it shall normally be stated.
What is VEBE time?
•Test appropriate for concrete mixes of low and very low workability. This method is a mechanised variation of the slump test and includes a determination of the workability of concrete. It is based on the principle of subjecting the concrete to vibration after removal of the slump cone.
How do you use Vicat apparatus?
Tap the mould to remove any bubbles of air. Place the mould along with the plate under the rod and plunger attached with the apparatus. Lower the plunger gradually till it touches the surface of the mould and then releases it quickly.
What is compaction factor for soil?
Typical bulking & compaction factor chart
| Material | Typical Bulking Factors | Typical Compaction Factors |
|---|---|---|
| Clay | 1.3 | 0.8 |
| Soil | 1.25 | 0.9 |
| Sand & Gravel | 1.12 | 0.88 |
| Rock (blasted) | 1.5 | 1.3 |
Why is slump test done?
The concrete slump test measures the consistency of fresh concrete before it sets. It is performed to check the workability of freshly made concrete, and therefore the ease with which concrete flows. The slump test is used to ensure uniformity for different loads of concrete under field conditions.