The K=5 Accelerated Strength Tester


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Title: The K=5 Accelerated Strength Tester

Author(s): K. W. Nasser and R. J. Beaton

Publication: Journal Proceedings

Volume: 77

Issue: 3

Appears on pages(s): 179-187

Keywords: accelerated tests; compressive strength; fresh concretes; heating; high temperature; pressure.

Date: 5/1/1980

A new apparatus is described which determines the potential strength of fresh concrete in 5 hr after it has been placed in special cylinders. Over 330 tests comprising 6600 cylinders were performed, and the results indicated that the 28-day strength is linearly related to the 5-hr accelerated strength, and this relationship is independent of mix proportions, type of cement, and inclusion of admixtures. The accuracy of prediction of the 28-day strength was += 13 percent for all the data.