Publicación:
Scientific and technical studies on eco-efficient binary cements produced with thermally activated ichu grass: Behaviour and properties
Scientific and technical studies on eco-efficient binary cements produced with thermally activated ichu grass: Behaviour and properties
No hay miniatura disponible
Fecha
2020
Autores
Frias, Moises
Caneda-Martinez, Laura
Sanchez de Rojas, M. Isabel
Tenazoa, Carlos
Flores, Elena
Título de la revista
Revista ISSN
Título del volumen
Editor
Elsevier BV
Proyectos de investigación
Unidades organizativas
Número de la revista
Abstracto
The present research study analyses, for the first time, the viability of using thermally activated ichu grass as a supplementary cementitious material for the design of future eco-cements. To this end, the ichu ash resulting from the activation was characterised and its pozzolanic activity, the evolution of its mineralogical phases during the pozzolanic reaction and the physical-mechanical behaviour of the blended cementitious matrices were analysed. The results show that ichu ash exhibited high pozzolanic activity in a pure pozzolan/lime system as a consequence of its high reactive silica content. Conversely, its use in a pozzolan/cement system gave rise to negative effects due to the presence of important alkali contents in the ash (9.6% Na2O eq). The blended cements presented greater water demand, reduced capillary absorption, increased resistivity and lower mechanical properties (10-14%) as well as reduced average pore size than the reference mortar. These blended cement matrices comply with the physical-mechanical requirements established in the standards for the production of eco-cements.
Descripción
Palabras clave
General Materials Science,
Building and Construction