Sodium naphthalene sulphonate formaldehyde/SNF/PNS/FDN

Sodium naphthalene sulphonate formaldehyde/SNF/PNS/FDN
Product Introduction
This product is Sodium Naphthalene Sulphonate Formaldehyde (SNF) based water reducing agent, made of naphthalene, sulfonic acid, formalin and alkali, through sulphuration, hydrolyzation, condensation and neutralization reaction. It has the advantage of high water reducing ratio, non-delayed coagulation, non-air entraining and strong adaptability. It can improve the workability of concrete to a large extent so as to reduce the water consumption for blending. Meanwhile, it can improve the strength of concrete. In addition, as the main master batch of various kinds of compound concrete admixture, it could produce series products of concrete admixture which can be suitable for all kinds of project requirement through compounding with other kinds of admixture. This product can contribute to the improvement of project quality and construction efficiency and the reduction of construction cost.
Product Parameters
Model Item SNF-A SNF-B SNF-C
Testing Standard GB8076-2008
Appearance Yellow-Brown Powder Yellow-Brown Powder Yellow-Brown Powder
Solid Content (%) 92 Min 92 Min 92 Min
PH Value 7-9 7-9 7-9
Na2SO4 Content (%) 5 Max 10Max 18 Max
Chlorine Content (%) 0.2 Max 0.2 Max 0.5 Max
Fitness (%) 0.315mm
Residue 5 Max
Residue 5 Max
Residue 5 Max
Flowability (mm) 250 Min 240 Min 230 Min
Surface Tension(N/m) (7 1 ± 1) ×10^(-3) (7 1 ± 1) ×10^(-3) (7 1 ± 1) ×10^(-3)
Water Reducing Rate 18%-27% 18%-25% 18%-22%
Cement Reserved Ratio(%) 15-20 15-18 15-18

Application Scope
1) It is applicable for all precast reinforced concrete and cast-in-place reinforced concrete.
2) It is applicable for high strength, ultra-high strength and moderate strength concrete, and is ideal for early-strength, antifreeze and large fluidity concrete.
3) It is used as the master batch of various kinds of compound concrete admixture.
Product Property
1) It has good dispersion effect on cement, which greatly improves the fluidity of mixing materials, concrete slump can reach 18cm-25cm.
2) Water reducing rate can reach 10%-30%. High water reducing rate can improve the concrete strength at different age: 3 days can increase 20%-60%; during 3rd day to 7th day can increase 15%-50%; the age of 7th day to 28th day can increase 10%-40%. For the same concrete strength, it can save 10%-25% cement consumption.
3) It can improve the impermeability, freeze resistance and corrosion resistance of concrete, reduce the shrink and creep, improve the durability of concrete and prolong its service life.
4) It has good adaptability to all kinds of cement and compatibility with other types of concrete admixtures, so the application range is very wide.
5) Non-delayed coagulation and non-air entraining, no obvious effect on concrete setting time.
6) No and few chloride ion, no corrosion to steel bars.

Product Usage
According to the project requirements, decide the dosage by test. Usually, the suggested dosage is 0.35%-1.5%.
Usually, this product is added into the blender together with water. If add before concrete casting, after suitable blending the performance will be better. This product can also mix with cementing materials first, then blend with water.
Package, Storage and Transportation
Package: woven fabric bag with plastic liner, including 25kg/40kg/650kg/700kg bag.
Storage:  it should be stored in a dedicated warehouse that is well-ventilated and dry. If caking and lumped, just sieve it by 0.63mm mesh or make it into solution, then use it. Usually, its shelf life is one year, if after the expiration date, it can continue to use when the testing results fall within the established range.
Transportation: this product is non-toxic and non- explosive. It can be transported by truck, ship and train.


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