The role of sodium thiocyanate in concrete
2025-05-26
Sodium thiocyanate is primarily used in concrete as a high-early-strength agent
Sodium thiocyanate is primarily used in concrete as a high-early-strength agent and an antifreeze agent. By lowering the freezing point, accelerating hydration reactions, and improving material properties, it significantly enhances the construction effects and mechanical properties of concrete in low-temperature environments. Its applications encompass shortening setting time, enhancing early strength, optimizing workability, and reducing winter construction costs.
Core Mechanism of Action
Low-Temperature Adaptability
It lowers the freezing point of the water solution in the concrete mixture and capillaries, ensuring that it remains liquid even below 0℃ and preventing freezing from damaging the structure.
By complexing iron ions, it accelerates the hydration reaction of iron-containing minerals, improving the early strength of the cementitious material.
Performance Optimization Effects
Improved Mechanical Properties
At dosages of 0.02%-0.3%, the compressive strength at 3 days can be increased by 20%-0%, making it particularly suitable for winter construction and the rapid demolding needs of prefabricated components.
Ultimate compressive and flexural strengths are significantly enhanced without affecting long-term durability.
Construction Efficiency Improvement
Shortens setting time by 30%-50%, reduces heating and curing time, and accelerates formwork turnover.
Reduces water demand by 10%-15%, improves the early stability of concrete, and enhances the surface decorativeness after casting.
Related Blog
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Potassium thiocyanate (KSCN) has a wide range of applications, mainly covering the following areas:
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Ammonia water (ammonium hydroxide solution) is an alkaline liquid formed when ammonia gas dissolves in water.
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