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Xingzhenghe is one of the largest manufactures of superplasticizers. Our Annual output is over 150,000 Mts.
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Products have been sold to more than 60 countries, such as South Korea, Japan, Vietnam, Indonesia, Australia, Canada, Russia, Saudi Arabia etc.
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warehouses are set up in major ports for more timely delivery , in Tianjin,Qingdao,Shanghai, Guangzhou,and other places with branches (offices) and foreign trade transit warehouse.
Sodium hypophosphite
Sodium hypophosphate is a white, tasteless, non-toxic, water-soluble crystal powder. Its chemical formula is Na2HPO4, which can be used in the manufacture of fertilizers, cleaning agents, preservatives and food additives, and is also one of the common control agents in polycarboxylic acid water reducing agents.
Sodium hypophosphite
| Content of Sodium hypophosphate | ≥102 |
| Content of Sodium sulfite | ≤0.2 |
| PH | 6.0-7.0 |
| Sulfate (in SO4),% | ≤0.0030 |
| Chloride (in Cl),% | ≤0.0030 |
| Calcium (Ca), % | ≤0.0025 |
| Iron (Fe), % | ≤0.00010 |
| Lead (Pb) mg/kg | ≤1.0 |
| Chromium (Cr) mg/kg | ≤0.1 |
| Arsenic (As) mg/kg | ≤1.0 |
| Cadmium (Cd) mg/kg | ≤0.1 |
| Zinc (zinc) mg/kg | ≤0.1 |
| Filter test ml/min | ≥90 |
| Lead precipitation test % | ≥98 |
The role of sodium hypophosphate in polycarboxylic acid superplasticizer
- Adhesive
Sodium hypophosphate has bonding effect. When added to polycarboxylic acid superplasticizer, it can increase the adhesion and cohesion between concrete particles and improve the stability and strength of concrete.
- Cement adhesive
Sodium hypophosphate can increase the contact area between the carboxyl group contained in polycarboxylic acid superplasticizer and cement particles, increase the adhesion and cohesion of cement and concrete particles, promote the formation of cement adhesive and improve the strength of concrete.
- Retarding agent
The addition of sodium hypophosphate in polycarboxylic acid superplasticizer can release phosphate ions slowly, forming ion concentration gradient in the surrounding environment, thus affecting the chemical reaction rate on the surface of cement and concrete particles, delaying the setting time of concrete, and making concrete have better processability and ductility.
- Dispersant
Sodium hypophosphate can also be added as a dispersant to polycarboxylic acid superplasticizer, which can effectively disperse the particles in concrete during construction, increase the fluidity and water reduction of concrete, and reduce the shrinkage and cracking and leakage of concrete while improving the performance of concrete.