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Boral developing lower carbon concrete for infrastructure

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13 Aug, 2024

This post was originally published on Sustainability Matters

Construction materials company Boral Limited (Boral), in partnership with industry players and researchers, is developing a lower carbon concrete product using Australian calcined clay as an alternative supplementary cementitious material (SCM).

Boral has partnered with the University of Technology Sydney (UTS), Transport for NSW and environmental technology company Calix as part of a project supported by SmartCrete CRC, an independent cooperative research centre (CRC) that brings together collaborators from industry, research and government to help ensure the viability of Australia’s concrete infrastructure.

The two-year project, co-funded through the Commonwealth’s CRC Program, aims to further demonstrate the technical feasibility of calcined clay concrete for use in Australian buildings and infrastructure. The partners — comprising suppliers, university researchers, asset owners and providers — will work on accelerated lab testing and field trials as part of the validation stage.

A first batch of clay has been successfully calcined by Calix’s renewably powered electric calcination technology, demonstrating the potential of the approach to produce a low carbon intensity SCM.

The project follows research and development at the UTS Boral Centre for Sustainable Building carried out over the past three years whereby the suitability of a number of Australian clay sources were identified.

Vik Bansal, CEO and Managing Director at Boral, said: “Boral is committed to a lower carbon future and we never stand still. We are continuously improving and diversifying our lower carbon concrete offering by identifying new ways to reduce the cementitious intensity of our products.”

Dr Ali Nezhad, Head of Sustainability and Innovation at Boral and Boral lead on the calcined clay project, said: “It’s an exciting time to be at the forefront of the research and development being done on lower carbon concrete. The industry is constantly looking for ways to innovate, push the boundaries and find ways to be more sustainable. Given the abundance of clay in Australia, using Australian calcined clay was a natural decision for us.

“We have been impressed with the work done to date and initial testing in this project is promising. We look forward to the building and construction industry in Australia embracing these new innovations.”

Image caption: Calcined clay concrete sample preparation at UTS Boral Centre for Sustainable Building. Image credit: Boral.

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ABB receives EPD status for gearless mill drive ring motor

ABB receives EPD status for gearless mill drive ring motor

ABB has gained Environmental Product Declaration (EPD) status for its Gearless Mill Drive (GMD) ring motor — technology used to drive large grinding mills in the mining industry.

An EPD is a standardised document that provides detailed information about the environmental impact of a product throughout its life cycle. Based on a comprehensive Life Cycle Assessment (LCA) study, the EPD highlights ABB’s commitment to transparency, environmental responsibility and supporting customers in making informed decisions on sustainability in their supply chains.

ABB analysed the environmental impact of a ring motor across its entire life cycle from supply chain and production to usage and end-of-life disposal. The study was conducted for a ring motor of a semi-autogenous grinding (SAG) mill with an installed power of 24 MW and was based on a reference service life of 25 years.

“Sustainability is at the core of our purpose at ABB, influencing how we operate and innovate for customers,” said Andrea Quinta, Sustainability Specialist at ABB. “By earning the Environmental Product Declaration for our ring motor, we emphasise our environmental stewardship and industry leadership for this technology. We adhered to the highest standards throughout this process, as we do in the ABB Ring Motor factory every day. This recognition highlights to the mining industry what they are bringing into their own operations when they work with ABB.”

The comprehensive LCA was conducted at ABB’s factory in Bilbao, Spain, and was externally verified and published in accordance with international standards ISO 14025 and ISO 14040/14044. It will remain valid for five years.

The ring motor, a key component of the GMD, is a drive system without any gears where the transmission of the torque between the motor and the mill is done through the magnetic field in the air gap between the motor stator and the motor rotor. It optimises grinding applications in the minerals and mining industries by enabling variable-speed operation, leading to energy and cost savings.

The full EPD for the ABB GMD Ring Motor can be viewed on EPD International.

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