Effect of sodium hydroxide concentration on the performance of alkali-activated recycled cement-based materials

Compared with traditional cement, alkai-activated cementitious materials have higher strength, lower hydration heat, simple manufacturing process and less investment. At the same time, this paper uses recyced cement-based materials, the combination of the two groups also conforms to the principle of green, low energy consumption. In this paper, sodium hydroxide was used as alkali excitation reagent to study the macroscopic compressive strength of samples under different concentrations of sodium hydroxide and the influence of calcium carbonate content on macroscopic strength at microscopic scale.