Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Volcanic tuff ash as quartz replacement in autoclaved aerated concrete: microstructure modification and performance enhancement
The energy-intensive quartz milling process dominates the environmental impact of autoclaved aerated concrete (AAC) manufacturing. This study examines volcanic tuff ash as a quartz replacement (0–100%) in AAC production, evaluating fresh properties, hardened state performance, and microstructural characteristics. Improved compressive strength (11.6% increase to 3.61 MPa) and A-value (13% increase) are achieved at 20% replacement, attributed to enhanced tobermorite crystallinity and pozzolanic reactivity. The formation of hydrogarnet was observed in tuff ash samples, contributing to hazardous element immobilization. Thermal conductivity decreases to 0.080 W/(m·K) with increasing tuff ash content, while maintaining structural integrity. These findings demonstrate the feasibility of tuff ash incorporation for both improved material performance and reduced environmental impact.
Volcanic tuff ash as quartz replacement in autoclaved aerated concrete: microstructure modification and performance enhancement
The energy-intensive quartz milling process dominates the environmental impact of autoclaved aerated concrete (AAC) manufacturing. This study examines volcanic tuff ash as a quartz replacement (0–100%) in AAC production, evaluating fresh properties, hardened state performance, and microstructural characteristics. Improved compressive strength (11.6% increase to 3.61 MPa) and A-value (13% increase) are achieved at 20% replacement, attributed to enhanced tobermorite crystallinity and pozzolanic reactivity. The formation of hydrogarnet was observed in tuff ash samples, contributing to hazardous element immobilization. Thermal conductivity decreases to 0.080 W/(m·K) with increasing tuff ash content, while maintaining structural integrity. These findings demonstrate the feasibility of tuff ash incorporation for both improved material performance and reduced environmental impact.
Volcanic tuff ash as quartz replacement in autoclaved aerated concrete: microstructure modification and performance enhancement
Straub, C. (Autor:in) / Yuan, B. (Autor:in) / Brouwers, H. J. H. (Autor:in) / Chen, W. (Autor:in)
Journal of Sustainable Cement-Based Materials ; 14 ; 369-378
01.02.2025
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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