Sulphonated Naphthalene Formaldehyde

1. Sulphonated naphthalene formaldehyde is brown powder in appearance, and it is non-toxic and odorless. Moreover, it has no corrosion on steel bars.
2. With the same amount of cement and constant water-cement ratio, increase the slump of the concrete, and improve the workability of the concrete. The slump can be increased by 1.0-1.5 times.
3. It can greatly improve various mechanical properties and durability of concrete such as impermeability.
4. The dosage is 0.5-1.0 of the amount of gelling materials, the water reduction rate can reach 12-20%, and the early strength and strengthening effect are obvious. The strength of concrete can be increased by 60-130% in 3 days, the strength in 7 days can be increased by 40-60%, the strength in 28 days can be increased by 20-40%, and the long-term strength is still improved.
5. When keeping the concrete strength and slump the same, it can save 15-20% of cement compared to concrete without water-reducing agent.
6. Adding this product can greatly improve the workability of concrete, improve the physical properties of concrete, and increase the compressive, tensile, flexural strength, elastic modulus and long-term strength of concrete.
7. This product can be mixed with other components to make personalized admixtures, such as early-strength water-reducing agent, retarding water-reducing agent, pumping antifreeze, pumping water-reducing agent, etc.

As a high-efficiency concrete plasticizer, sulfonated naphthalene mainly has the following functions in concrete:

• First of all, SNF superplasticizer can reduce the water consumption without affecting the normal construction of cement concrete, so that the concrete needs to lose less water during the hardening process, resulting in fewer pores in the concrete, thereby improving the concrete strength;
• Secondly, it can greatly improve the workability of concrete, and reduce the energy consumption during construction and mixing;
• Thirdly, without reducing the performance and mechanical index of cement concrete, SNF can reduce the amount of cement and water and greatly reduce the construction cost.

• Sulfonated naphthalene is suitable for cast-in-place, prefabricated reinforced concrete additives, and mixed with fly ash concrete.
• It can be widely used in concrete engineering and products for natural curing and steam curing.
• For Portland cement, ordinary Portland cement, slag Portland cement, fly ash Portland and pozzolan Portland cement have good adaptability.
• SNF powder is especially suitable for the following concrete projects: fluid concrete, plasticized concrete, steam-cured concrete, impermeable concrete, waterproof concrete, natural-curing precast concrete, steel and prestressed reinforced concrete, high-strength ultra-high-strength concrete. 

(1) The solid fuel material (naphthalene) is weighed and put into the naphthalene melting kettle, and the liquefied naphthalene is pressed into the sulfonation kettle through the pipeline.

(2) Inject sulfuric acid into the sulfonation kettle according to the formula and process for sulfonation. After testing, press into the condensation kettle.

(3) Hydrolysis and condensation are carried out according to the formula and process. The process needs to be strictly monitored with the degree of reaction. After finishing this process, the intermediate material is pressed into the neutralization kettle.

(4) According to the formula, pour the liquid caustic soda into the neutralization kettle for neutralization until the neutralization is completed.

(5) The liquid product is sent from the neutralization kettle to the liquid product tank by the pump for standby.

• The sulphonated naphthalene powder is calculated as the percentage of the gelling material, and the liquid product is converted to the usage amount according to the solid content.
• It is better to adopt the post-mixing method, and appropriately extend the mixing time to facilitate uniformity.
• SNF liquid should be used and stored at a temperature above 15℃ to avoid the crystallization of sodium sulfate.

• The powder product is packed in double-layer plastic inner and outer woven bags, 40kg per bag, and 250kg liquid in large iron drums or by agreement.
• Protect from rain and moisture, store in a ventilated and dry place.
• The validity period is three years, and it can still be used after passing the concrete test.