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Sodium thiocyanate (NaSCN) is used in concrete as a setting/strength accelerator, mainly in cold weather. Sodium Thiocyanate is an organic sodium salt which is the monosodium salt of thiocyanic acid. It contains a thiocyanate.It is an odorless white solid. Sodium thiocyanate is the chemical compound with the formula NaSCN.
Sodium Thiocynate as a Corrosion Inhibitor ::: In the metallurgical industry, sodium Thiocyanate has a wide range of uses. It can be used in electroplating, cyanide copper plating, and nickel plating. The compound can also be used in cyanide brass plating. Sodium Thiocyanate is effective in metal coating and plating because it eliminates oxides, acting as a corrosion inhibitor. Metal plating with sodium Thiocyanate gives them a shiny finish.
Sodium Thiocynate also used Agrichemical Industry :Weeds and pests pose a significant change to agricultural production. Sodium Thiocyanate is effective in preparing pesticides and herbicides for the sector. Its potency is unmatched as it destroys weeds and pests, aphids and thrips. As a powerful phytotoxic compound, sodium thiocyanate kills different herbs and pests within no time.
Sodium thiocyanate (NaSCN) is normally used as a kind of food preservative in daily life, but using excessive NaSCN in milk would cause the low absorption of iodine in human body, and then would make the normal secretion of thyroid hormone disorder. In this study, we developed a method combines AgNPs and MIL-101(Fe) which is a kind of Metal organic frameworks materials as a kind of composite Surface Enhanced Raman Scattering (SERS) substrate and achieved the determination of NaSCN in spiked milk.
| Appearance | Deliquescent colorless crystals |
| Melting point | 287 °C (549 °F; 560 K) |
| Boiling point | 307 °C (585 °F; 580 K) decomposes |
| Density | 1.735 g/cm3 |
| pH | 4,8 at 1.070 g/l at 20,1 °C |
Sodium thiocyanate (NaSCN) is used in concrete as a setting/strength accelerator, mainly in cold weather.
Here are general industry guidelines (not a site-specific prescription):
Recommended Dosage (General)
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0.2% – 1.0% by weight of cement
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Typical effective range: 0.3% – 0.6%
Example
If cement = 100 kg
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Minimum: 200 g (0.2 kg)
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Common use: 300–600 g
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Maximum (do not exceed): 1 kg
How to Use
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Dissolve sodium thiocyanate completely in mixing water
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Then add to the concrete mix
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Ensure uniform mixing
Construction Industry : Sodium thiocyanate is used in the cement industry as an initial strengthening agent. The chemical enhances and strengthens bonding and acts as a grinding helper. Also, the use of sodium Thiocyanate prolongs the lifespan of cement. When preparing concrete, the chemical aidsin accelerating hardening. So, it’s a critical setting accelerator in concrete admixtures.
Benefits
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Faster initial and final setting
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Improved early strength
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Useful in cold climates or when early demoulding is required
Important Warnings
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Do NOT overdose → can reduce long-term strength
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Not recommended for RCC / prestressed concrete
(may increase corrosion risk of steel) -
Avoid combining with chloride-based accelerators
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Always do a trial mix before site use
If you tell me:
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PCC or RCC?
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Grade of concrete (M20, M25, etc.)
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Weather conditions
