The dust collected from the smokestack of a coal-fired plant
Lightly roasted fine-grained clay used as cement
Certain volcanic soils much used by the ancients
Or "rice husk ash" - the ground remains of burnt rice hulls
A by-product of silicon and ferrosilicon alloy production
Or more fully, "Ground, granulated blast furnace slag", a by-product of steel production
Tagged in alkali, Ndazi, rice husk, steam curing
From Inter American Conference on Non-Conventional Materials and Technologies in Ecological and Sustainable Construction. IAC-NOCMAT 2005, Rio
Bwire Hdazi, Joseph Tesha, Christian Nyahumva, Sigbritt Karlsson
Department of Engineering Materials, University of Dar es Salaam
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