AS 1012.4.2:2014 PDF Download

AS 1012.4.2:2014 is a standard that outlines the method for determining the air content of freshly mixed concrete. The air content is determined by measuring the reduction in air pressure in a chamber above the concrete. This standard is used for quality control purposes, such as plant production testing or mixer uniformity tests. However, it is important to note that the air content should be determined when specified.

The compaction method used for the sample can affect the results obtained. This standard provides guidelines for compaction using either rodding or vibration, or for using self-compacting concrete (SCC) placed in a bowl. It is important to consider the type of aggregates used in the concrete, as this standard is recommended for concretes made with relatively dense natural aggregates. It is not suitable for concretes made with lightweight aggregates or aggregates of high porosity.

It is essential to acknowledge that this standard may involve hazardous materials, operations, and equipment. The standard itself does not address all the safety problems associated with its use. Therefore, it is the responsibility of the user to establish appropriate safety and health practices and determine the applicability of regulatory limitations before implementing this standard.