The Rock Strength Index Apparatus is equipped with a ruler assembled on the frame, which enables direct measurement of the distance D between the conical plates before and after the test. This feature provides precise data on the rock sample’s deformation during compression testing.

By allowing accurate measurement of the platen distance, the ruler enhances the reliability of the results, making certain that critical parameters such as sample displacement and deformation are accurately recorded. This is particularly valuable for geotechnical engineers and researchers analyzing rock behavior under applied loads. The integrated ruler simplifies the testing process by providing immediate, on-the-spot measurements, supporting consistent and detailed evaluations of rock strength and structural integrity.

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