Measurement of Air Content in Concrete
This article describes five techniques for the measurement of the air content of fresh concrete and one technique for hardened concrete. The tests discussed are: AASHTO T 152, Standard Method of Test for Air Content of Freshly Mixed Concrete by the Pressure Method; AASHTO T 196, Standard Method of Test for Air Content of Freshly Mixed Concrete by the Volumetric Method; AASHTO T 121, Standard Method of Test for Density (Unit Weight), Yield, and Air Content [Gravimetric] of Concrete; AASHTO T 199, Standard Method of Test for Air Content of Freshly Mixed Concrete by the Chace Indicator; and ASTM C457, Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete. The authors focus on identifying potential sources of errors, notably failure to maintain and calibrate equipment and to properly follow test procedures. One section briefly explains the use of the air void analyzer (AVA) to determine the volume and size distributions of air voids. Readers are referred to the appropriate AASHTO or ASTM standard for full details of each procedure.
- Record URL:
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Authors:
- Wilson, Michelle L
- Publication Date: 2010-5
Language
- English
Media Info
- Media Type: Web
- Features: Photos; References;
- Pagination: n.p.
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Serial:
- HPC Bridge Views
- Issue Number: 61
- Publisher: National Concrete Bridge Council
- Serial URL: http://www.hpcbridgeviews.org
Subject/Index Terms
- TRT Terms: Air content; Air voids; Concrete curing; Field tests; Fresh concrete; Laboratory tests; Standards; Volumetric analysis
- Subject Areas: Materials; I32: Concrete;
Filing Info
- Accession Number: 01159475
- Record Type: Publication
- Files: TRIS
- Created Date: Jun 21 2010 7:06AM