These products have been developed as completely economic and effective accelerators to accelerate the setting and hardening process of unreinforced concrete and mortar. Accelerators of unreinforced concrete and mortar are used in solution form. The mechanism of action of these products is such that by accelerating the hydration reactions of the leading phases (especially C3A) of cement, they shorten the setting time of concrete and by lowering the level of water saturation inside the concrete, they prevent it from freezing.