The hydrophobic effect, the water absorption decreasing of the concrete or mortar mix as well, as the increasing of the water resistance and freeze-resistance of the hardened concrete is provided by this admixture.
Accelerating admixture can be used to increase either the rate of stiffening or setting of the concrete or the rate of hardening and early strength gain to allow earlier formwork demoulding.
One special admixture for the concreting and the operation with the mortar mixes within the negative air temperatures. This admixture is used during winter time operation, by the temperatures below 0°C