Explain the procedure for measurement of workability of fresh concrete using slump cone test.

Explain the procedure for measurement of workability of fresh concrete using slump cone test.
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Test Procedure: i. Clean the mould from inside and apply oil to it. ii. Place the mould on smooth horizontal, rigid & non-absorbent surface or the centre of metallic tray. iii. Fill the mould with the concrete to be tested in four layers, tamping each layer 25 times with the tamping rod, taking care that the strokes are evenly distributed over the c/s. iv. Remove the mould by one smooth continuous vertical motion. v. The concrete subsides and this subsidence is called “slump.” Measure the slump in mm by using a metric scale from top of cone. vi. Based on measured slump, the degree of workability is designated as follows.

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