Research on the mechanical properties of composite admixture concrete

The effect of high-efficiency composite activator on the working performance and mechanical properties of composite admixture concrete composed of steel slag (SS), blast-furnace slag (BS) and fly ash (FA) were studied in this paper. Results show that: the use of composite activator has no adverse effect on the working performance of fresh concrete; the effect of composite activator on the improvement of the compressive strength of C30 is obvious, while the effect on C50 concrete is weakened. The reason is that when the cement content per unit volume of concrete is high, cement has a certain inhibitory effect on the hydration of steel slag in the early stage.