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Ball Penetration Apparatus

Ball Penetration Apparatus

Product Code : EL-CTLE-10314

Quick Answer: The Ball Penetration Apparatus (Kelly ball test) is used to determine the workability of Portland cement & concrete, and is considered simpler and much faster than the slump test, with twice the Kelly ball reading approximately equal to the slump. It consists of a cylinder with a ball-shaped bottom and handle (together weighing 15 kg), guided by a strip frame that serves as a reference for measuring the depth of penetration, which can be recorded to the nearest 0.5 mm on the mm-graduated handle. It conforms to ASTM C-360.

The apparatus is used to determine the workability of Portland cement & concrete, and the Kelly ball test is considered to be simple and much faster than the slump test; twice the Kelly ball reading approximately equals the slump. It consists of a cylinder with a ball shaped bottom and handle, together weighing 15 kg, and a strip frame guides the handle and serves as a reference for measuring the depth of penetration. Penetration can be recorded to the nearest 0.5 mm, and the handle is graduated in mm.

Standards: ASTM C-360

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Last Updated: September 2026

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