Benign Processing for Construction

概要

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A major factor in energy consumption associated with concrete and other cement-based building materials is that used on producing portland cement. Increasing the reactivity of less reactive materials is one way to reduce energy consumption, and also to reduce CO2 emissions. The other way is to produce cement-based materials with higher performance and so use less material overall. This paper discusses various strategies to achieve these goals. Producing more reactive dicalcium sillicate (C2S) during clinkering reactions, or forming highly reactive, high surface area C2S by chemical synthesis, are two approaches that have received much attention. Autoclaving lime-silica mixtures is a well established technology which has been re-examined recently, and alkali-activated aluminosilicates are widely used in some countries. Mechano-chemical processing is a promising new route to benign processing of construction materials. Finally, extrusion of high-volume, fiber-reinforced cement-based composites is a promising new technology.
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