The admixture is intended for the production of lightweight and heavyweight concretes at ambient temperatures as low as -25°C.
PROPERTIES OF THE ADDITIVEThe BETOFROST H25 additive is used in the construction of cast-in-place concrete and reinforced concrete structures, in the manufacture of precast concrete and reinforced concrete products at production facilities and construction sites, and for the preparation of construction mortars within a temperature range of 0°C to -15°C.
When preparing concrete mixtures during the winter period, it is necessary to adhere to the requirements of SNiP 3.03.01-87.
The admixture is chloride-free, suitable for use in reinforced and prestressed structures, does not cause reinforcement corrosion, does not reduce the mixture's working time, does not alter concrete color, and does not cause surface efflorescence.DOSING THE ADDITIVEUsing the BETOFROST N25 admixture allows for a 10–20% reduction in the initial mixing water content.
The admixture must not be used in reinforced concrete structures containing A600, A800, At600(S, K), or At800 grade reinforcing steel.
The admixture is most effective when added together with the mixing water.
The recommended dosage of BETOFROST N25 is 1.0–5.0% of the cement mass (calculated based on the dry admixture content).
The dosage depends on the forecast minimum ambient temperature and the required workability of the concrete mix.
The dosage may vary depending on cement consumption, the water-cement ratio, and the concrete curing and hardening conditions.
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Calculated minimum concrete hardening temperature, °C | Admixture dosage, % by mass of cement, calculated based on the dry matter of the admixture* |
0 ÷ -5°С | 0,9% |
-5 ÷ -10°С | 0,9% |
-10 ÷ -15°С | 1,3% |
-15 ÷ -20°С | 2,0% |
-20 ÷ -25°С | 4,5-5,5% |
*—The admixture dosage is specified for a standard heavy-concrete mix with a cement content of 400 kg/m³ and a water-cement ratio of 0.4.
Admixture concentration: 35%