Compaction Factor Test for Concrete Workability

Compaction Factor Test for Concrete Workability

Product Code : EL-CTLE-10291

Quick Answer:
The Compaction Factor Test is a laboratory workability test for concrete, used specifically for low-workability concrete mixes for which the slump test is not suitable. It measures the compaction factor – the ratio of the weight of partially compacted concrete to the weight of fully compacted concrete – using apparatus that includes trowels, a hand scoop, a steel rod, and a balance.

Compaction factor test is the workability test for concrete conducted in laboratory. The compaction factor is the ratio of weights of partially compacted to fully compacted concrete, and the test is used for concrete which has low workability, for which slump test is not suitable.
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, and it is used to determine the workability of concrete.
 
Standards: BS 1881:103, IS:5515 
 
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Last Updated: September 2026

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