Description

Sodium Polynaphthalene Sulfonate, also known as naphthalene sulfonate formaldehyde condensates (SNF), are a class of high-range water reducers widely used in the concrete industry. These admixtures are particularly valued for their ability to significantly improve the workability and strength of concrete by reducing the water-cement ratio without compromising the consistency of the mix. This makes them essential in the production of high-performance concrete where precise control over the material's properties is required.

Technical Feature

The primary active ingredient in Polynaphthalene Sulfonate is naphthalene sulfonate, a compound derived from naphthalene, an aromatic hydrocarbon. This compound is polymerized with formaldehyde to create SNF a high-efficiency dispersant. The molecular structure of SNF is characterized by its ability to adsorb onto cement particles, imparting a strong negative charge on their surfaces. This electrostatic repulsion between particles prevents flocculation, allowing the cement particles to remain well-dispersed within the mix. This dispersion effect dramatically reduces the viscosity of the concrete mix, enabling a significant reduction in water content while maintaining or even improving the mix's workability. The result is a denser, stronger, and more durable concrete, which is less prone to shrinkage and cracking. 

Application

1. High Water Reduction: Sodium Polynaphthalene Sulfonate can reduce the water content in a concrete mix by up to 25-30%, significantly enhancing the strength and durability of the final product. 2. Improved Workability: Despite the reduced water content, Sodium Polynaphthalene Sulfonate NSF provides excellent workability, allowing for easier placement and compaction of the concrete.
3. Enhanced Strength: The lower water-cement ratio achieved through NSF leads to higher compressive and tensile strength in concrete, making it suitable for high-load-bearing structures.
4. Reduced Shrinkage and Cracking: The dense microstructure formed with NSF Sodium Polynaphthalene Sulfonate reduces the likelihood of shrinkage and cracking, extending the lifespan of the concrete.
5. Compatibility: Sodium Polynaphthalene Sulfonate is compatible with a variety of cement types and other admixtures, including fly ash, silica fume, and slag.

Specifications

Certificates

Dosage

Dry mixed homogeneously with other ingredients of dry mortar and packaged as one product, which can be at job site mixed with recommended dosage of water for application. Recommended dosage is 0.01-0.30% based on binder weight. The detailed dosage should be determined by test in advance according to local raw materials and construction regulation.

Package, Storage & Shelf Life

It is packed in 25kg, 650KG compound bag.

Keep container closed when it is not in use, store in dry, cool and shaded place.

Shelf Life: Minimum 12 months when unopened. After the expiration date, it can be used if testing results is qualified.

RFQ