Fosroc Conplast NC Concrete Admixture

Fosroc Conplast CN Concrete Admixture is a specialised concrete admixture primarily used to inhibit corrosion of steel reinforcement in concrete structures. It is not a water‑reducing or superplasticising agent like many other Conplast products; instead, its main role is to protect embedded steel from corrosion by using a corrosion‑inhibiting chemical 🧪 What It Is Type: Corrosion inhibiting concrete admixture Chemical Base: Calcium nitrite solution (typically min. ~30% calcium nitrite) Appearance: Pale straw coloured liquid that disperses readily in mixing water Chloride Content: Very low / nil to prevent reinforcement corrosion ⭐ Key Features & Benefits Corrosion protection: The calcium nitrite acts as a corrosion inhibitor for steel reinforcement in concrete — particularly useful in structures exposed to chlorides (e.g., marine, de‑icing salts). Can be used with other admixtures: Compatible with many other Fosroc concrete admixtures (just add separately; don't premix them together). Improved durability: Helps extend service life of reinforced concrete. Neutral effect on workability: Does not significantly affect normal concrete flow or strength when used at appropriate dosage. 🧱 Typical Uses Reinforced concrete in marine or coastal structures Concrete exposed to de‑icing salts Parking decks, bridges, highways, industrial floors Concrete where high durability and corrosion resistance are required In mixes also containing other performance admixtures (e.g., plasticisers or superplasticisers) 📊 How It Works Calcium nitrite migrates to the steel surface and forms a protective layer that inhibits corrosion reactions between steel and aggressive ions like chlorides. This helps maintain the integrity of reinforcement and increases concrete longevity 📦 Dosage & Addition Typical dosage range: ~7.5 to 22.5 litres per m³ of concrete — exact amount determined by trial mix and project requirements. Add with the mixing water to ensure uniform distribution. 📌 Additional Notes Include the water from the admixture when calculating the total water/cement ratio because Conplast CN is added in significant volume. Storage: Keep in original sealed container, cool and dry, with a typical 12‑month shelf life. Follow good curing practices to maximise concrete performance and ensure corrosion protection. 🧠 Summary Fosroc Conplast CN is a corrosion‑inhibiting calcium nitrite‑based concrete admixture that enhances the durability of reinforced concrete in corrosion‑prone environments, while being compatible with other admixtures and having minimal impact on workability and strength.If you want, I can also provide chemical base, dosage guidelines, compatibility, or comparison with other corrosion inhibitors.