AS 1478.1:2000 (R2018) PDF Download

AS 1478.1:2000 (R2018) "Chemical Admixtures for Concrete, Mortar, and Grout: Admixtures for Concrete" sets out the requirements for chemical admixtures used in concrete mixes that contain portland and blended cements. The standard includes several appendices that provide additional information and guidance on various aspects related to admixtures.

Appendix A covers the sampling procedures for admixtures, ensuring that proper procedures are followed to obtain representative samples for testing and evaluation. Appendix B provides information on the use of admixtures in concrete, offering guidance on their application, dosage, and compatibility with different cement types.

Appendix C is a guide for determining the chloride ion content in admixtures, which is an important parameter to consider for durability and corrosion resistance. Appendix D focuses on thickening admixtures, providing information on their properties and effects on the concrete mix.

Appendix E tackles shrinkage-reducing and shrinkage-compensating admixtures, which are used to control and mitigate concrete shrinkage. It offers information on their effectiveness and dosage requirements. Appendix F covers permeability-reducing admixtures, which are used to minimize the permeability of concrete and enhance its durability.

The standard also states that admixtures that have previously been tested and approved to AS 1478—1992, and meet the requirements of AS 1478.1:2000 (R2018), do not need to undergo reassessment. This provision recognizes the suitability and compliance of previously accepted admixtures to the current standard.