Air entraining additives series AIR – chemical additives that provide controlled air entrainment into concrete mixtures, increasing its frost resistance and durability.
Air entraining agents provide plasticizing effect of concrete admixture, at the same time cause reducing of its strength (1% of agent reduces the concrete strength compressive of by 3%). Therefore its dosing should be very controlled and limited. The content of involved air in concrete mixture should be no more than 4-5%. Then the strength of concrete practically does not decrease. Due to plasticizing effect of the additive a water-cement ratio can be decreased, which in turn increase the concrete strength and neutralize the negative effect of air agent.
Air entraining additives are used for manufacturing concrete and reinforced concrete products and structures. The additives of AIR series are recommended while constructing of bridges, roads, and airfield structures which are intended to operate in difficult climatic conditions. The additives are also used for constructing any kind of structures where the concrete frost resistance is required.
