The Influence Of Water Reducing Agent On The Performance Of Concrete And The Calculated Dosage Of Water Reducing Agent

Adding appropriate admixtures to concrete can improve the early strength and high strength properties of concrete. Concrete mixed with early strength agent often has better early strength performance. The amount of water can be reduced by adding appropriate water reducing agent when mixing. When the water-cement ratio is low, it can ensure that the concrete is well formed and can obtain a high 28d strength. Admixtures can increase the density of cement, increase the adhesion between aggregate and cement, and improve the long-term strength of concrete. Therefore, if you want to improve the strength and performance of concrete, you can consider adding high efficiency water reducing agents and admixtures when mixing the mixture.

The water-reducing agent has the advantages of improving concrete workability, reducing water consumption, increasing strength and improving concrete durability. However, in the calculation method of the amount of water reducer, it is easy to ignore the adsorption of powdery substances in concrete aggregate on the water reducer. The yield of water-reducing agent in low strength concrete is low, and the powdery substance in aggregate is insufficient after adsorption. However, the amount of superplasticizer in high-strength concrete is relatively large, and the adsorption amount of powder in aggregate is not much different from that of low-strength powder, which will cause the amount of high-strength superplasticizer to be low.

When designing the mix ratio, the amount of water reducing agent is just right, not too much or too little, which is convenient for production control and ensures the stability of concrete quality. This is the goal of concrete technicians. However, whether the concrete raw materials used are natural or man-made, it is inevitable that some powdered materials will be introduced. Therefore, when designing the mix ratio, the powdered material of concrete raw materials should be considered when calculating the dosage of water reducing agent.

Before calculating the amount of superplasticizer, the mix ratio and the amount of superplasticizer were determined by experiments, and then the total powder volume of concrete was calculated according to the mix ratio of concrete. Then use the calculated amount to calculate the amount of water reducer for other strength grades.

With the large-scale use of machine-made sand and the increase of powdery materials, powdery materials absorb or consume a certain amount of water reducer. Using the total powder content of concrete raw materials to calculate the amount of water reducer is easier to control and relatively more scientific.

Hydroxyethyl Methyl Cellulose HEMC

Polycarboxylate Superplasticizer Powder

Calcium Lignosulfonate (CF-5)