Standard
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AS 1012.4.1:2014
[Current]Methods of testing concrete, Method 4.1: Determination of air content of freshly mixed concrete — Measuring reduction in concrete volume with increased air pressure
This Standard sets out the method for determining the air content of freshly mixed concrete from observations of the change in volume of the concrete when it is subjected to an increased air pressure.
Published: 04/04/2014
Pages: 11
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
1 Scope
2 Referenced documents
3 Principle
4 Apparatus
4.1 Pressure-type air meter with water level gauge
4.1.1 General
4.1.2 Measuring bowl
4.1.3 Conical cover assembly
4.1.4 Tube
4.2 Calibration cylinder
4.3 Rod
4.4 Mallet
4.5 Vibrators
4.6 Strike-off bar
4.7 Pouring vessel
4.8 Scoop
5 Sampling
5.1 Field sampling
5.2 Laboratory sampling
6 General procedure
7 Compaction procedures
7.1 Compaction by hand
7.2 Compaction by vibration
7.3 Self compacting concrete
8 Procedure for determining air content
9 Calculation of air content
10 Determination of aggregate correction factor
11 Records
12 Report
Appendix A
A1 Introduction
A2 Calibration of calibration cylinder
A3 Calibration of measuring bowl
A4 Determination of constant R
A5 Determination of expansion factor D
A6 Determination of calibration factor K
A7 Calibration test to determine operating pressure (P), on pressure gauge
Cited references in this standard
[Current]
Methods of testing concrete, Method 2: Preparing concrete mixes in the laboratory
[Current]
Methods of testing concrete, Method 4.3: Determination of air content of freshly mixed concrete — Measuring air volume when concrete is dispersed in water
[Current]
Methods of testing concrete, Method 3.1: Determination of properties related to the consistency of concrete — Slump test
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