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What is Vicat Needle Test for Cement Setting Time about?

This test method determines the initial and final setting times of hydraulic cement pastes using a Vicat needle apparatus. The initial setting time is defined as the time when the needle fails to sink 25 mm into the paste. The final setting time is defined as the time when the 5 mm needle leaves no visible impression. Portland cement should have an initial setting time of at least 30 minutes and final setting time of no more than 10 hours. Quick setting cement should have initial and final setting times of

Author

April Lyn Santos

Language

EN