September 12, 2025MaterialsOpen Access

Comparative Evaluation of Different Biomass Ashes as Supplementary Cementitious Materials: Reactivity, Hydration Impact and Environmental Considerations

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Biomass ashes showed variable reactivity, with spelt husk ash contributing to strength gain while wood ashes did not.
Cumulative R3 heat after 7 days indicated spelt husk ash at 249 J/g SCM, supporting its use as a supplementary cementitious material.
Isothermal calorimetry revealed hydration effects where wood fly ashes impeded clinker reactivity, affecting compressive strength.
Diverse ash compositions highlight the limitations and potential of using biomass ashes in cement applications.

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This analysis investigates reactivity and hydration impacts of biomass ashes in cement, demonstrating significant environmental benefits.

Overmann et al. (2025) studied this question.

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