Effect of Tuff Powder Mineral Admixture on the Macro-Performance and Micropore Structure of Cement-Based Materials

Replacing Fly Ash or Silica Fume with Tuff Powder for Concrete Engineering in Plateau Areas: Hydration Mechanism and Feasibility Study

“…Kunal et al [13,14] discovered that a higher SiO 2 content in tuff powder results in a more pronounced pozzolanic effect, which favors the early development of compressive strength in tuff powder-silicate cement-based materials. However, other studies [9,15] have indicated that the inclusion of tuff powder may lead to varying degrees of reduction in the mechanical properties of concrete, possibly due to the lower SiO 2 content in the tuff powder used in these experiments.…”

“…Tuff rock powder displays a fragmental structure, distinct edges, and irregular shapes. Consequently, concrete with tuff powder requires a higher unit water content, necessitating prolonged mixing times during the blending process and enhanced vibration and compaction during pouring to ensure concrete quality [7][8][9]. The inclusion of tuff powder enhances concrete crack resistance and deformability [10].…”

El Uso del aditivo mineral como modificador de las propiedades mecánicas en el concreto: una revisión

“…Las CV provienen principalmente de las centrales eléctricas térmicas como un subproducto de desecho de la quema del carbón pulverizado; como alternativa para alcanzar un desarrollo sostenible se utiliza en proporciones de 50 a 60% de CV y así obtener lo que se conoce como cenizas volantes de alto volumen (HVFA) (Wang & Park, 2015). La ceniza volcánica metamórfica constituye cerca del 25% y todas ellas han sido alteradas (Shi, et al, 2020). Son ricas en alúmina y sílice; cuando se activan produce un gel de aluminosilicato que actúa como aglutinante.…”