Abstract
This study investigated the effect of curing temperature on the compressive strength and drying shrinkage of alkali-activated fly ash (AAFA) mortars. Class F fly ash was used as the raw material, and sodium oxide and liquid sodium silicate were used as alkaline activators. AAFA mortars with an alkaline-solution-to-binder ratio of 0.5 were prepared under four different initial curing conditions. Test results showed that the curing temperature appreciably influenced the compressive strength development and drying shrinkage of AAFA mortars at early ages. A higher temperature led to more effective alkali activation of fly ash. Based on the results, AAFA mortars cured at 65 °C for 12 h had superior mechanical properties.
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