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Sodium Naphthalene Sulfonate for Concrete | SNF Water Reducer

Our Sodium Naphthalene Sulfonate (SNF) water reducer is a high-performance synthetic powder, formulated from β-sulfonate formaldehyde condensate and reactive polymers. It delivers exceptional water reduction, effectively retards setting time, and significantly boosts compressive strength. Available in low-sulfate grades (Na₂SO₄ content below 5%, or up to 10% per grade), it is the ideal superplasticizer for medium- to high-strength concrete mixes that demand high water cut rates and superior workability.
Solid Content:
Appearance:
PH Value:
Product name:
Surface Tension:
Availability:
Quantity:
  • XRT-SNF

  • xinrui-te

  • 382440


SNF Water Reducer powder sample on a plate for concrete admixture testing

  Introduction

This Sodium Naphthalene Sulfonate is a synthetic powder made from β‑sulfonate formaldehyde condensate and reactive polymers. It’s a high-performance sodium naphthalene sulfonate formaldehyde superplasticizer for concrete that gives strong water reduction, slows setting, 1and boosts strength. 

As a low-sulfate SNF water reducer for high-strength concrete, it can have a sodium sulfate content below 5% (or up to about 10% depending on the grade), making it ideal for medium- to high-strength mixes that require large water cuts.

 Parameters & acceptance criteria

INDEXITEM

SNF-A

SNF-B

SNF-C

Appearance

Light brown powder

Light brown powder

Light brown powder

Solid Content

≥92

≥92

≥92

Sodium sulfate Content

5%

10%

<18%

Chloride Content

0.3%

0.4%

0.5%

PH  Value

7-9

7-9

7-9

Net Starch Fluidity

≥250 mm

≥240 mm

≥230 mm

Surface Tension

70±1×10-3N/M

70±1×10-3N/M

70±1×10-3N/M


SNF

 Usage Instructions

◆ Dosage

       Blending dosage: 0.5%–1.0% (by weight of cement), with a recommended  

       dosage of 0.6%.

     Adjust dosage based on specific mix design and performance requirements.

◆ Solution Preparation

      Prepare aqueous solutions as needed, following standard mixing procedures 

      for concrete admixtures.

◆ Application Methods

     PNS (Polynaphthalene Sulfonate) can be used directly.

     Alternatively, add the agent to the mix, followed by water addition, maintaining a water-to-cement ratio of 60%

     (or as specified in the mix design).

Overview of the Application of Naphthalene Series Water Reducer

1. The low-sulfate sodium naphthalene sulfonate formaldehyde water reducer for high-strength concrete (Na₂SO₄<5%) is ideal for  

     high-rise buildings and precast elements, with 20-25% water reduction and 28d strength up to 85 MPa, saving 12-18% cement.

2. Our high-performance SNF water reducer for concrete works perfectly for long-span 

      bridges and ready-mix concrete, ensuring good pumpability, 18-23% water reduction, and stable strength.

3. Suitable for hydropower dams and road projects, the low-sulfate naphthalene water reducer (Na₂SO₄<10%) features retarding 

      effect, low-heat hydration, and improved impermeability and wear resistance.

4. The composite solution of Sodium Naphthalene Sulfonate for high-strength concrete + retarder + fiber effectively controls cracks, 

      with a 95% crack-control rate and high durability for underground projects.

Related Products

1.Steel Fiber

2.Embossed Synthetic Macro Fiber 

     





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