Abstract
In this study, response surface method (RSM) was used to predict a quadratic model for mechanical and durability properties of alkali activated slag concrete containing silica fume (SF) and recycled coarse and fine aggregates (RCA, RFA). Mechanical, durability, economic, and environmental aspects of the mixes were evaluated. The results showed that substituting natural aggregates with recycled ones had minimal impact on the final price. Different alkali activated mixes did not make a significant difference in the CO2 emission. Although the optimum mix design was the one with 0% RCA, 0% RFA, and 8.1% SF, other environmentally friendly concretes had comparable desirability factors.
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