Hope you know self-compacting concrete, which does not need any external force to settle properly over the structure.
The Self-compacting concrete used where the reinforcement is congested and concrete compaction not possible by vibrator.
The test used to find out the fluidity of freshly mixed self-compacting concrete is known as Flow Table Test. It is conducted in the laboratory.
There are some other tests which is used to find out the consistency based on their workability
The ability of concrete to handle, transport, and placing between the formwork with minor segregation is called the Workability of concrete.
SI | Test Name | Suitable Workability | Field/Lab |
1 | Slump Test | High | Field/Lab |
2 | Kelly Ball Test | High | Field/Lab |
3 | Compaction Factor | Low | Lab |
4 | Flow Table test | Low | Lab |
5 | Vee – bee test | Low & very low | Lab |
The flow table test is performed in the lab to find out the fluidity of concrete where the nominal size of the coarse aggregates does not exceed 38mm.
The flow table test will be performed as per BS EN 12350 part 1 standards.
The sample volume of concrete should not be less than 0.02cum of the concrete batch. If the concrete contains an aggregate size of more than 38mm, then it should be a wet screen to exclude the bigger size aggregates.
The sample concrete should be taken immediately from a batch of concrete, which is before to pour over the formwork.
The flow percentage of concrete is the percentage of spread concrete average diameter increment over the base diameter of moulded concrete.
Acquire the result using the below flow table test formula
Video Courtesy – اعداد مهندس مدني
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