Mould used for testing the workability or consistency of freshly mixed concrete.
The test shows how much the concrete subsides (or “slumps”) when the mould is lifted. It’s a standard method for field / lab quality control of concrete mix fluidity.
Operating Procedure:
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Place the base plate on a firm, level, non‑absorbent surface.
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Position the slump cone upright on the base plate.
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Fill the cone in three layers of approximately equal volume. Each layer is compacted / tamped a fixed number of times (standard often calls for 25 or so strokes per layer) using the tamping rod.
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After the final layer is filled and levelled off, lift the cone vertically, without any lateral motion.
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Immediately after lifting, measure the vertical drop (slump) of the concrete’s highest point down to the level of the base of the mould. This is the slump value.
