EUNISET 580C is a noncorrosive, nonchloride admixture for concrete. It accelerates cement hydration, resulting in shortened setting times and increased early compressive strengths. EUNISET 580C does not contain calcium chloride and is completely non-corrosive to reinforcing steel, metal decks, and to all metal components of admixture storage and dispensing systems. It conforms to BS EN 934-2 and to Type C of ASTM C 494.
With cements: In concrete mixtures, EUNISET 580C accelerates the chemical reaction between Portland cement and water. It speeds up the formation of gel – the binder that bonds concrete aggregates together. Accelerated gel formation, shortens the setting time of concrete, compensates for the set slowing effects of cold weather and contributes to the development of higher strength. Gel formation promotes heat generation within the mixture, helping to protect the concrete from freezing during the critical first hour after placement. With other admixtures: EUNISET 580C is compatible with air entraining admixtures such as the EUNIAIR AE Series; water reducers such as EUNICEM P7; mid-range water reducers such as EUNICEM P20, and high-range water reducers such as EUNICEM 205. EUNISET 580C should not be premixed under any circumstances with other admixtures. While some admixtures can be usefully combined within the same mix the performance of this product may well be affected by the presence of other chemicals and we recommend that European Concrete Additives be contacted for advice in all such circumstances.
• Specially formulated to reduce concrete setting times and increase early strength of concrete in very cold conditions.
• May be used to reduce the time for which the concrete must be protected against freezing in ambient temperatures as low as -7°C.
• May be used to speed finishing operations and/or form removal, leading to savings in concrete construction costs.
• Provides set acceleration and early strength development similar to that provided by calcium chloride, but without the potential corrosive effects.
• Can be used where potential corrosion of embedded or stressed steel must be avoided.
• Can be used in concrete that is to be placed on steel clad or zinc coated steel decks where corrosion must be avoided.
• In common with most concrete accelerators, the inclusion of EUNISET 580C may reduce the ultimate compressive strength of concrete. The extent of strength loss should be established by conducting concrete trial mixes.
