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Features Specifications » Naphthalene Sulfonate Formaldehyde Condensate
High Range Water-Reducing Admixture
Naphthalene Sulfonate Formaldehyde Condensate(NSF)
Description
NSF is a high range water reducer, commonly referred to as a superplasticizer. NSF is an anion surface active agent based on polyalkyaryl sulfonate. Having a strong dispersion effect on cement, it is a kind of highly effective, low air-entrained water-reducing agent with effective water reduction and low air-entrainment. NSF contains no added chloride. FDN meets the requirements of chemical admixture specifications for concrete: GB8076-1997, GB50119-2003.
Uses
NSF superplasticizer can be applied to make flowable, strong or steam-curing concrete. The minimum working temperature can be as low as 0 C. In steam curing, concrete with superplasticizer has to strong enough before heating. The steam curing specification has to be pre-tested. It is particularly suitable to be base material for compound admixtures.
NSF possesses the features of no retarding, no air-introducing, superplastic high water-reducing and strength enhancing. It has low alkali content, low sulfonate, and high purity. It can be widely used in different concretes with less dosage and easy to use.
Advantages
High water-reducing rate: NSFcan reduce water more than 25%. It has features of superplasticizer, effectively increases concrete fluidity and reduces water penetration and segregation. Therefore, improves concrete placement and makes concrete easy to use and compacting.
Strengthening: Given the same amount of cement and slump requirement, this product can increase the concrete stress by 50-110%, 40-90%, 40-70% and 20-40% on day 1, 3, 7, and 28 respectively.
High applicability: It can be used with different variety of cement. It compatible with other admixtures. It can be used with expanding admixture, air entraining admixture as well as fly ash for supplement and catalystic purpose.
Appropriate setting time: It has less effect on the initial and final setting time. The difference in setting time generally is less than 1 hour.
Low sodium sulphate content: The aqueous solution has no Crystals in winter, which provide solution for pipe congestion of concrete mixing in winter time.
Safety: No toxic, smell, and radiation. & No corrosion to steel bar. No flammable and explosive material. It is not hazardous substance.
Effective durability: It can modify the pore structure of concrete and increase the property of anti-seepage, freezing, and carbonization.
Easy to use: It can be added directly or used after melt in water. It can be used for different working condition and concrete mixers
Parameters & Acceptance Criteria(Sodium salt of polynaphthalene sulfonic acid)
Parameters
Criteria
Actual results
Solid Content
92% min
93.38%
Moisture, %
<= 8.0
7.1
Fineness
5.0% max
0.54%
pH value
8 - 10
8.62
Sodium Sulfate Content
5.0% max
3.60%
Chlorides Content
2.0% max
0.21%
Surface Tension
68-72 Mn/m
71
Concrete Reducing Water Rate
20% min
21.50%
Major Specifications (Compared to untreated concrete)
Testing Item
China National Standard (superior product)
Product specifications
Addition Rates
The general addition rate is from 0.4 to 1.0%. When powder superplastic is used, it should added together with cement. Do not add it on the surface of wet sand and rock. When aqueous solution is used, it should be sufficiently melt and mixing completely.
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