Slump Test Dimensions – Standard top diameter, bottom diameter, and height In the standard slump (Abrams) cone used for assessing concrete workability, what are the nominal dimensions in the order: top diameter, bottom diameter, height?

Introduction / Context:
The slump test is the most common field test for fresh concrete. To ensure comparable results, the mould must have the standard geometry. Memorising these dimensions helps inspectors quickly verify equipment compliance.

Given Data / Assumptions:

• Standard slump cone (Abrams cone).
• We seek top diameter, bottom diameter, and height, in that order.
• Nominal metric dimensions.

Concept / Approach:
The slump mould is a frustum of a right circular cone. The top opening is smaller than the base, and the overall height is fixed so that the test measures consistent settlement under self-weight when the mould is lifted.

Step-by-Step Solution:
Recall standard dimensions: top ≈ 10 cm, bottom ≈ 20 cm, height ≈ 30 cm.Match the sequence requested (top, bottom, height) to the options.Select 10 cm, 20 cm, 30 cm.

Verification / Alternative check:
Practical cones include handles and foot pieces, but the internal geometry must respect the nominal sizes for test validity and correlation to standard slump classes.

Why Other Options Are Wrong:
They either invert the diameters or misstate the height, which would alter test behavior and invalidate comparisons.

Common Pitfalls:
Using dented, out-of-round, or incorrect cones; even small dimensional errors can skew measured slump.

Final Answer:
10 cm, 20 cm, 30 cm