Naphthalene Sulfonate Formaldehyde Condensate ( short for FDN ) is a kind high efficiency water reducer. It is wildly used as concrete additive to reduce water and strengthen the concrete slump and improve its liquidity. While keeping the slump and compressive strength basically unchanged, the consumption of cement can be saved by 15%.

Performance indexes of concrete mixed with FDN (Note: standard blend dosage: 75x10 -2 % powder)

Homogeneity indexes for FDN (Note: standard blend dosage: 75x10 -2 % powder)

Characters and Applications

A. Main ingredient is β-naphthyl sulfonate formaldehyde condensate.

B. It is yellow/brown powder, which is nontoxic, odorless, incombustible and non-corrosive to steel bars.

C. It is with good dispersion, high water reduction and early-strengthen effect. It can speed up the turnover of templates and fields, accelerate construction progress and shorten the completion period. It is applicable for concrete with early-strength and high-performance requirements and other concretes that need to enhance strength and improve long term performance.

D. Significantly increase the concrete slump and improve its liquidity, applicable for ready-mixed concrete, pumping concrete, high-liquidity concrete, grouting material, etc.

E. With low air content, it is applicable for all grades of concrete with steam curing condition and natural maintenance.

F. No corrosion to steel bars. It is applicable for precast concrete, cast-in-place concrete, reinforced concrete, prestressed reinforced concrete, etc. in various projects.

G. It can be used widely thanks for good compatibility with portland cement, regular portland cement, portland slag cement, portland flyash cement, etc.

Application Method and Notice

Blend dosage range is 5x10-1% to 1%, appropriate blend dosage can be selected according to project object and the materials used during application.

Packing, Transportation and Storage

A. Powder pack: woven fabric bag with plastic liner. Net weight: 25kg or 40kg or 750kor as request.

B. Cautions should be taken to prevent from being torn by sharp-ended objects while packages are being transferred or delivered. When being contaminated by high humidity or moisture in case of leakage, it can be prepared in prescribed ways for further use without surrendering any effect.

C. It should be stored in a dedicated warehouse that is well-ventilated and dry. The valid period is one year. After the expiration date, it can be used again if the testing results within the established range.