Abstract
To fabricate a new green building material without higher CO2 emission and much energy consumption, recycled construction waste was used as a raw material. Metakaolin was introduced as a cementitious binder instead of traditional Portland cement. NaOH and water glass mixture solution played a role of alkaline activator, then the activity of metakaolin would be released to show an excellent performance. The content of metakaolin was varied to obtain an optimal mechanical property and cost ratio. The specimens were fabricated in room, then cured in air after demoulding, robustness properties were measured which consist of compressive strength and bending strength, and their microstructures were investigated finally.
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