Rice Husk Ash--a Unique Supplementary Cementing Material: Durability Aspects

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Title: Rice Husk Ash--a Unique Supplementary Cementing Material: Durability Aspects

Author(s): P. K. Mehtra and K. J. Folliard

Publication: Special Publication

Volume: 154

Issue:

Appears on pages(s): 531-542

Keywords: alkali-aggregate reactions; durability; freeze thaw durability; freezing; rice; silica fume; sulfate attack; Materials Research

Date: 5/1/1995

Abstract:
Presents a review of recent research focusing on the durability of concrete and mortar containing rice husk ash (RHA). The purpose of the investigation was to determine the effects of RHA in cement products exposed to hostile environments. Included are the results of laboratory research on hydrochloric acid attack, sulfate attack, alkali-silica reaction, and frost action on mortar or concrete mixtures containing RHA. The results showed that mortar or concrete containing RHA showed a substantial reduction in mass loss on exposure to a hydrochloric acid solution and considerable reduction in alkali-silica and sulfate expansions. Also, the frost resistance of non-air- entrained concrete containing RHA was found to be considerably higher than similar concrete mixtures containing silica fume.