Volcanic tuff ash as quartz replacement in autoclaved aerated concrete: microstructure modification and performance enhancement
Source abstract
Abstract
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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovations in Concrete and Construction Materials · Recycled Aggregate Concrete Performance
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Lab of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, PR China
Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands
Materials Innovation Institute, Delft, The Netherlands
Funding
National Natural Science Foundation of China
References (26)
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