I. Introduction 

 M-4 high-slump pure naphthalene superplasticizer whose main ingredient is β-naphthalene sulfonate formaldehyde condensate, is a non-air-entraining water-reducing agent. The morphology of powder and liquid. The agent on the adaptability of concrete to improve the operability of concrete, widely used in highway, railway, bridges, tunnels, power plants, dams, high-rise buildings and other projects. 

 Second, product characteristics: 

 (1) In the case of the same water-cement ratio, slump of concrete can be increased more than 10cm. 

 (2) to maintain the same slump, the water reduction of up to 12-20%. 

 (3) of concrete early strength significantly enhance the effect, its strength is increased the range of 15-40%. 

 (4) to improve and enhance overall physical and mechanical properties of concrete, while maintaining the same strength can save 10-20% of cement. 

 (5) No corrosion of the steel. 

 Third, the use of: 

 (1) for the complex with the requirements of a water-reducing admixtures. 

 (2) for high-strength concrete, fluid concrete, early strength concrete, precast steam-cured concrete, prestressed concrete. 

 Four. The main technical indicators: 

 (1) Appearance: brown yellow powder, powder, liquid brown viscous liquid. 

 (2) Solid content: powder ≥ 92%; liquid ≥ 38%. 

 (3) PH value (5% aqueous solution) :7-9. 

 (4) Sodium content: powder 16-19%; liquid 7-9%. 

 (5) of cement paste fluidity: ≥ 200mm. 

 V. Using the methods and precautions 

 (1) dosage: 0.5-1.0% powder recommended dosage of 0.75%; liquid 1.0-2.0%, the recommended dosage of 1.5%, according to the concrete level increased, dosage can be increased appropriately. 

 (2) liquid temperature below 5 ℃, the temperature should be heated to prevent crystallization of preservation, crystalline water-reducing admixture does not affect the rate, but easy to plug the pipeline transmission additive. 

 Sixth, packaging, storage and transportation 

 (1) Powder: Plastic film inside the outside woven double-bag, 25kg; 

 (2) Liquid: iron drum, 250kg or 1000kg per barrel canned or tanker transport. 

 (3) The product should be stored in a dry place to prevent damp to prevent the fire. 

 (4) The product storage period of two years.