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Turning Waste into Greener Cementitious Building Material: Treatment Methods for Biomass Ashes-A Review
1Urban and Environmental Engineering, University of Liège, Quartier Polytech 1-Allée de la Découverte 9, B-4000 Liège, Belgium.
Materials (Basel, Switzerland)
|February 26, 2025
Summary
Biomass ash (BA) utilization in concrete offers a circular economy solution. Treatment methods are crucial for mitigating heavy metal leaching and enhancing concrete performance, supporting sustainable construction.
Area of Science:
- Environmental Science
- Materials Science
- Chemical Engineering
Background:
- Biomass ash (BA) production is rising due to biomass's carbon-neutral fuel status.
- BA can contain high levels of heavy metals and trace elements, posing disposal challenges.
- Integrating BA into a circular economy framework is essential for sustainable waste management.
Purpose of the Study:
- To review existing data and treatment methods for biomass ash (BA).
- To assess the impact and efficiency of various BA treatment strategies.
- To explore combined treatments and novel approaches for BA utilization in construction.
Main Methods:
- Literature review of biomass ash properties and treatment techniques.
- Analysis of factors influencing BA characteristics (biomass type, combustion).
- Evaluation of treatment methods for heavy metal and chlorine leaching mitigation.
Main Results:
- Varying BA properties necessitate tailored treatment strategies for effective utilization.
- Treated BA can be used as a cement substitute, improving concrete compressive strength.
- Effective treatments enable higher cement replacement levels, promoting greener construction.
Conclusions:
- Biomass ash utilization presents a viable path towards a circular economy in construction.
- Advanced treatment methods are key to overcoming challenges like heavy metal leaching.
- Further research and practical applications of treated BA can advance carbon-neutral construction solutions.
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