Load-bearing constructional units from the ash of rice hulls

Degradation of Al/SiCp composites produced with rice-hull ash and aluminum cans

“…Further heating of the ash to eliminate residual carbon produces %95 wt.% pure silica with %10 m 2 /g specific surface area and particle sizes above 20 lm (Souza et al, 2000). Therefore it is highly attractive, especially in the field of construction materials and cement industry (Maksoud et al, 1970;Rodrigues and Monteiro, 1999). Due to its high degree of pozzolanic action, the silica extracted from rice hulls has been considered for the preparation of high performance concrete and mullite whiskers (Souza et al, 2000).…”

“…A number of applications have been proposed for rice-hull ash (Chandrasekhar et al, 2003;Gorthy and Mukunda, 1999;Maksoud et al, 1970;Patel and Prasanna, 1987;Rodrigues and Monteiro, 1999;Souza et al, 2000). According to the literature, silica concentrations in dry rice-hulls can be as high as 21.5 wt.%.…”