AS 1012 Pt.4-1983

标准号：AS 1012 Pt.4-1983
发布日期：1983/4/5 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This Section 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 (see Note 1).The method provides for compaction of the sample either by rodding or by vibration (see Note 2).NOTES:1. This method is intended for use with concretes made with relatively dense natural aggregates for which the aggregate correction factor can be determined satisfactorily by the technique described in Clause 1.8. It is not recommended for use with concretes made with lightweight aggregates, or aggregates of high porosity.2. The results obtained will be dependent on the compaction method used.