A Method for Direct Measurement of Entrained Air in Concrete

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Title: A Method for Direct Measurement of Entrained Air in Concrete

Author(s): W. H. Klein and Stanton Walker

Publication: Journal Proceedings

Volume: 42

Issue: 6

Appears on pages(s): 657-668

Keywords: none

Date: 6/1/1946

Abstract:
Since the amount of air entrained in concrete is of major importance and the methods now in use to determine that amount have inherent objections, the pressure method, by application of Boyle’s law, has advantages. The Klein air meter is described, following tests by Pennsylvania-Dixie Cement Corp. and National Ready Mixed Concrete Assoclatlon. The paper presents a description, with illustrations, of the Klein air meter, the test procedure, calculation of air content and calibration of meter, and presentation of data on the use of the method.