Abstract
Through FTIR, SEM/EDS and XRD analysis of hydration products of slag/fly ash concrete paste activated by composite solid alkali, the activation effect of composite solid alkali activator on slag/fly ash system was studied. The results show that the hydration products of the excitation system are mainly C-S-H gels, and the crystallization of C-S-H gels with 28 days hydration age tends to be perfect. The hydration products have good bonding and compact structure, which greatly improves the strength of the matrix. The damage pictures of 28-day-old C30 concrete blocks after compression test further show that the composite solid alkali activator has a good activation effect on slag/fly ash system.
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