AS 1141.30.2:2022 sets out the method for preparing reference specimens that represent each of the visually distinguishable rock types present in a quarried source for use in AS 1141.30.1.
AS 1141.30.2:2022 history
2022AS 1141.30.2:2022 Methods for sampling and testing aggregates, Method 30.2: Preparation of aggregate reference specimens for visual comparison
1970AS 1141.30.2:2009 Methods for sampling and testing aggregates Preparation of reference samples of aggregates for visual comparison