The Ultimate Blue-Collar Challenge: Can You Identify These 20 Hardcore Concrete Tools?
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What hollow, cone-shaped metal tool is packed with wet concrete and flipped upside down on-site to measure its water density and consistency?
Explanation
The Slump Cone Test measures consistency. Wet concrete is packed into the cone and leveled off. When the metal cone is lifted away, the amount the wet mud collapses (or "slumps") reveals if the water-to-cement ratio is correct.