AS 1774.4.1:2021 Refractories and refractory materials一 Physical test methods Method 4.1: Preparation of test pieces一By casting.
This document describes a procedure for laboratory preparation of test pieces by casting.
This document applies to dense, medium weight and light weight castables (containing either hydraulic cements or other binders) to conventional and low cement castables, and to any other type of refractory castabie that can be installed by a casting process.
Appendix A provides a method for measuring the consistency of unshaped castable refractories.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document.
NOTE: Documents referenced for informative purposes are listed in the Bibliography.
AS 1774.30, Refractories and refractory materials — Physical test methods, Method 30: Drying and firing schedules
AS 2701, Methods of sampling and testing mortar for masonry constructions
AS 4433.2, Guide to the sampling of particulate materials, Part 2: Preparation of samples
3 Terms and definitions
For the purposes of this document, the terms and definitions given in AS 2780 and the following apply.
indicates the existence otan option
indicates that a statement is mandatory
indicates a recommendation
4 Principle
Castable refractory samples are mixed with water or other specified liquids until a specified consistency is achieved. They are then consolidated in a mould and allowed to cure and dry under defined conditions prior to testing.
5 Safety
For information on safety in laboratories, refer to the relevant parts of the AS/NZS 2243 series.
6 Apparatus
The following apparatus shall be used:
(a) Mixer, a planetary or paddle mixer having mixer casing and blades made of a material that is inert to the castable materials.
(b) Vibrating table, fixed firmly to a rigid base. It shall be flat and horizontal and perform only uniaxial vertical vibrations at a frequency of 50 Hz ± 5 Hz. When loaded, it shall be capable of operating at a double amplitude of 0.5 mm ± 0.05 mm.AS 1774.4.1 pdf download.