What question did this study set out to answer?

The aim is to examine how mechano-carbonation of basalt can enhance carbon capture in supplementary cementitious materials.

Pairing Chemical Activation and Carbonation of Basalt to Manufacture Novel Supplementary Cementitious Materials that Incorporate Carbon Capture

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Randomized trial explores enhanced carbon capture using basalt SCMs, indicating potential for sustainable concrete production.

The aim is to examine how mechano-carbonation of basalt can enhance carbon capture in supplementary cementitious materials.
High-energy attrition-milling of basaltic fines in a CO2 atmosphere was performed.
Materials characterization techniques were used to study microstructural changes during mechano-carbonation.
Different milling conditions (250–500 rpm, 10–40 ball to powder ratios) were tested for their effects on SCM properties.
The Dv(50) particle size increased by 12.5× and the BET surface area by 3.7× after mechano-carbonation.
An increase in pozzolanic reactivity by 4-fold was observed with 500 rpm and a 40 b/p ratio compared to plain basalt.
The final SCM achieved a 50% increase in CaCO3 content and a pozzolanic reactivity similar to fly ash.

Hollingham et al. (2026) studied this question.

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View Full Paper

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Authors

Randomized trial explores enhanced carbon capture using basalt SCMs, indicating potential for sustainable concrete production.

The aim is to examine how mechano-carbonation of basalt can enhance carbon capture in supplementary cementitious materials.
High-energy attrition-milling of basaltic fines in a CO2 atmosphere was performed.
Materials characterization techniques were used to study microstructural changes during mechano-carbonation.
Different milling conditions (250–500 rpm, 10–40 ball to powder ratios) were tested for their effects on SCM properties.
The Dv(50) particle size increased by 12.5× and the BET surface area by 3.7× after mechano-carbonation.
An increase in pozzolanic reactivity by 4-fold was observed with 500 rpm and a 40 b/p ratio compared to plain basalt.
The final SCM achieved a 50% increase in CaCO3 content and a pozzolanic reactivity similar to fly ash.

Hollingham et al. (2026) studied this question.

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