Calcined clays as an SCM in sustainable Australian concrete

Author: Toby Pamment

Due to the diminishing fly ash and slag supplies in Australia as a result of global decarbonisation efforts, alternative supplementary cementitious materials (SCMs) are needed to ensure the long-term sustainability of Australian concrete both environmentally and economically. Calcined clays offer an attractive opportunity as an abundant, low carbon and high performance SCM, having been well studied and demonstrated internationally. However, the boundaries of these products are not well understood, particularly considering the millions of tons of clay excavated worldwide for infra-structure projects. Why not explore the possibilities of applying circular economy principles to this issue and upcycling these materials for use as a sustainable concrete solution? Through sampling and characterisation of excavated by-product clays sourced across Victoria, this study aims to clarify the potential new boundaries for calcined clay criteria in concrete. The characterisation results were compared against a consolidated set of relevant academic and industrial compositional criteria for clay used as SCMs. A preliminary clay screening methodology is presented with alternative applications identified for samples with unsatisfactory criteria in order to maximize the valorization of these byproduct materials.

Key dates

  • Save the date

    October 2025

  • Abstract submissions open

    13 October 2025

  • Abstract submissions close

    31 January 2026

  • Author notification

    April 2026

  • Registration open

    May 2026

  • Full program available

    May 2026

  • Conference dates

    18-20 August 2026

Learn more about this abstract in-person

Don’t miss out on the opportunity to hear more about this abstract by attending the Engineering, Innovation and Technology Forum 2024. 

More Abstracts