Sodium Naphthalene sulfonate formaldehyde condensate as high range water reducer in construction
Naphthalene-based superplasticizer is a type of superplasticizer with naphthalenesulfonic acid formaldehyde condensate (SNF, Sulfonated Naphthalene Formaldehyde)** as the main component, which is widely used in concrete engineering. It is an anionic surfactant with good dispersibility, water reduction and strengthening properties.
1. Main ingredients
Naphthalenesulfonic acid formaldehyde condensate (SNF)
May contain appropriate amounts of co-solvents, retarders, defoamers, etc.
2. Main properties
High-efficiency water reduction: can reduce water consumption by 15-25% and improve concrete strength.
Strengthening effect: increase the 28-day strength of concrete by 20-60%.
Improve fluidity: significantly improve the workability of fresh concrete, making it easier to construct.
Low air content: compared with polycarboxylate superplasticizer, naphthalene-based superplasticizer has a lower air entrainment amount and is suitable for high-strength concrete.
Excellent adaptability: suitable for various cements, pumped concrete, prefabricated components, etc.
Contains no chloride ions: will not cause steel corrosion.
3. Main uses
Ordinary concrete: improve fluidity, reduce bleeding, and improve strength.
High-strength concrete: reduce water-cement ratio and improve early and late strength.
Pumping concrete: improve fluidity and facilitate pumping construction.
Precast components: improve concrete density and improve precast component strength.
Massive concrete: reduce hydration heat and reduce crack risk.
4. Physical properties
Appearance: brown powder or brown liquid
Water solubility: easily soluble in water
pH value: 7-9 (1% aqueous solution)
Water reduction rate: 15-25%
Air content: ≤ 3%
Chloride ion content: ≤ 0.1%
5. Usage method
Recommended dosage: powder 0.5%-1.5%, liquid 1.5%-2.5% (according to cement mass ratio).
Water addition method:
Can be directly added to the concrete mixing water and stirred evenly.
It can also be prepared into a solution before use, the effect is more stable.
Note:
Do not mix with strong alkaline materials to avoid affecting the dispersion effect.
When stored at low temperatures, liquid water reducer may crystallize and should be stirred or heated to restore to its original state before use.
6. Comparison with polycarboxylate superplasticizer (PCE)
Performance SNF-based superplasticizer (SNF) Polycarboxylate superplasticizer (PCE)
Water reduction rate 15-25% 25-40%
Enhancement effect Strong Stronger
Slump retention General Excellent
Air entrainment Low Adjustable
Adaptability Adaptable to various cements May have poor adaptability to some cements
Environmental protection Production process is highly polluting Environmental protection
Price Low High
7. Applicable fields
Ordinary civil buildings
Bridges, highways, railway projects
Prefabricated components
Massive concrete
Water conservancy and hydropower projects
Summary: SNF-based superplasticizer is an economical, practical and efficient concrete admixture, suitable for a variety of concrete projects, with good water reduction and enhancement effect, but the fluidity retention is slightly weaker than that of polycarboxylate superplasticizer. It can be used in combination with other admixtures in high-demand projects to optimize performance.
If you have specific engineering needs or want to optimize the formula, you can tell me and I can provide more detailed suggestions!
- Brand
- XYDCHEM
- Model
- 3
- Country of origin
- China