Research on the Fatigue Properties of Recycled Aggregates from Alkali-Activated Slag Cement
This paper carries out the fatigue test of recycled-aggregate concrete,and combined with the fatigue damage model of concrete,it explores the damage performance of recycled-aggregate concrete from the two aspects of the test and the damage model.This paper uses alkali-activated slag cement as cementitious materials and recycled aggregates to prepare recycled-aggregate mixtures,uses water glass as alkali activators to explore the optimal alkali activator content,and analyzes and studies the fatigue performance of the alkali-activated recycled-aggregate mixture,and obtains the fatigue equations of recycled aggregate from the slag activated water silicate at different ages and under different stress ratios.Through the test,it is found that when NaOH,Na2SiO3 are used as alkali activators,there is an optimal content of 4%and 6%respectively,both of which can activate slag to improve the performance of regenerated aggregates.
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