PTA announces Results from Pilot Fine Aggregates Program

March 11, 2025

Proficiency Testing Australia is pleased to announce the completion of the first Fine Aggregates Proficiency Testing Program. This program has recently been approved by International Accreditation New Zealand (IANZ) and is now part of PTA’s scope.


Round 1 (Aggregates 23) of this program was conducted in September 2020 with 28 participating laboratories provided with ~5 kg of fine aggregate (sand). This round of the program was designed to cover the following methods:


AS 1141.5 
Particle density and water absorption of fine aggregate


AS 1141.24
Aggregate soundness test by exposure to Sodium Sulphate


AS 1141.25.3
Degradation factor – fine aggregate


AS 1141.33
Clay and fine silt – settling method


AS 1141.33
Organic impurities other than sugar


The final program report 1237 is now available on the PTA website. Registration for participation in Round 2 (Aggregates 26) of the Fine Aggregates Proficiency Testing Program will open in August 2021.


For more information about the program, please contact PTA at ptaenquiry@pta.asn.au