Per §5.4.1 (Slump Test), the cone is filled with concrete in how many …

Question

Per §5.4.1 (Slump Test), the cone is filled with concrete in how many layers, and each layer is tamped with how many strokes of the standard rod?

Accepted Answer

D. {'text': '4 layers, 25 strokes each', 'label': 'D'}

1. §5.4.1: 'The mould is then filled in four layers, each being approximately one fourth the height of the mould. Each layer is tamped 25 times by the 16 mm diameter tamping rod uniformly.'
2. After all four layers, the concrete is struck level with a trowel and the mould is then lifted vertically.
_Source: IGNOU ET-522 Block-2 Unit-5 Workability & Fresh Concrete-I, §5.4.1, p. 8_

Answer

{'text': '2 layers, 12 strokes each', 'label': 'A'}

Answer

{'text': '3 layers, 20 strokes each', 'label': 'B'}

Answer

{'text': '5 layers, 30 strokes each', 'label': 'C'}