ASTM-C231:2008 Edition

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C231-08a Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

Published By	Publication Date	Number of Pages
ASTM	2008	9

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Categories: 91.100.30 - Concrete and concrete products, ASTM

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Description

ASTM C231-08a

Historical Standard: Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

ASTM C231

Scope

1.1 This test method covers determination of the air content of freshly mixed concrete from observation of the change in volume of concrete with a change in pressure.

1.2 This test method is intended for use with concretes and mortars made with relatively dense aggregates for which the aggregate correction factor can be satisfactorily determined by the technique described in Section 6. It is not applicable to concretes made with lightweight aggregates, air-cooled blast-furnace slag, or aggregates of high porosity. In these cases, Test Method C 173/C 173M should be used. This test method is also not applicable to nonplastic concrete such as is commonly used in the manufacture of pipe and concrete masonry units.

1.3 The text of this test method references notes and footnotes that provide explanatory information. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.

1.4

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)

Keywords

air content; calibration; concrete; correction factor; measuring bowl; meter; pressure; pump; unit weight; Aggregate correction factor; Air content–concrete; Calibration–cement/concrete analysis instrumentation; Pressure testing–concrete

ICS Code

ICS Number Code 91.100.30 (Concrete and concrete products)

DOI: 10.1520/C0231-08A

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Significance and Use
2	Apparatus
3	Calibration of Apparatus Determination of Aggregate Correction Factor FIG. 1 FIG. 2
4	Preparation of Concrete Test Sample Procedure for Determining Air Content of Concrete
6	Calculation Precision and Bias Keywords
7	A1. CALIBRATION OF APPARATUS A1.1 A1.2 A1.3 A1.4 A1.5 A1.6
8	A1.7 A1.8 A1.9

Additional information

Standard Title	C231-08a Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
Published Code	ASTM
Publication Date	2008
Pages Count	9
ICS Codes	91.100.30 - Concrete and concrete products