Abstract: Based on the central composite experimental method of response surface methodology, the alkali activated slag-limestone powder cement mortar was prepared by choosing alkali content and limestone powder content as variables, and the mechanical strength of different age was studied. The response surface of relation between each variable and the flexural, compressive strength was obtained through data processing. And the effects of various variables on strength of alkali activated slag-limestone powder cement mortar were analyzed. The response surface model of strength was established, and it can serve as a scientific method for predicting the strength of mortar at different ages in the field. The optimized results showed that when the Na2O content is 8.27% and limestone powder content is 14.02%, the components can exert synergistic effect and ensure good mechanical properties. Therefore, the response surface methodology is an effective optimization method for alkali activated cement mortar.
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