Rice husk ash as a source of silica in alkali-activated fly ash and granulated blast furnace slag systems

J.M. Mejía, R. Mejía de Gutiérrez, F. Puertas
Mater. Construcc.Vol. 63, 311, 361-375 doi: 10.3989/mc.2013.04712
http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1442/1569