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ASTM C191 Standards for Cement Tests

The ASTM C191 standard, titled "Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle," provides guidelines and procedures for determining the time of setting of hydraulic cement using a Vicat apparatus. This test is crucial for assessing the setting characteristics and hardening time of cement.

ASTM C191 outlines the testing method using a Vicat apparatus to measure the initial and final setting times of cement. The initial setting time is determined by the penetration resistance of the Vicat needle, while the final setting time is determined by the loss of penetration resistance.

Products associated with ASTM C191 include hydraulic cement samples, a Vicat apparatus with needles of specified dimensions, and a timer or stopwatch for time measurement.

By following the ASTM C191 standard and utilizing associated products, engineers, researchers, and testing laboratories can accurately determine the time of setting of hydraulic cement. This information aids in proper control of concrete placement and curing, ensuring the desired strength development and performance of cementitious materials.

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