How does water reducing agent affect the quality of concrete?

With the development of science and technology, people have put forward various new and higher requirements for the performance of concrete. Since the introduction of concrete admixtures in the 1940s, its development has not only changed the internal structure of hardened concrete from the micro and sub-micro levels, but also changed the structure of fresh concrete during the process.

When using water reducing agents, the water consumption of fresh concrete can be reduced without affecting the workability of concrete. Its main component is surfactant, and its main effect on fresh concrete is surfactant.

Performance characteristics of water reducing agent

1. High water reducing rate. The dosage is 0.5-1%, and the water reduction rate can reach 15-25%. Under the same slump conditions, adding high-efficiency water-reducing admixture (powder) can save 25-30% of cement consumption;

2. Early strength and enhancement effect are obvious. Concrete mixed with high-efficiency water-reducing admixture (powder) can reach 60-70% of the design strength in three days, 100% in seven days, and the strength is 30-40% higher than that of blank concrete in 28 days;

3. High quality plastic. The slump loss of concrete over time is small, with basically no loss in 30 minutes and 10-20% loss in 90 minutes;

4. Wide applicability to cement, good workability and cohesion. Good compatibility with other types of admixtures;

5. It can significantly improve the freeze-thaw resistance, impermeability, and sulfate corrosion resistance of concrete, and comprehensively improve other physical properties of concrete;

6. Especially suitable for the following concrete: fluid plasticized concrete, natural curing, steam curing concrete, impermeable and waterproof concrete, durable freeze-thaw resistant concrete, sulfate corrosion resistant marine concrete, as well as steel bars and prestressed concrete; 7. High-efficiency water-reducing agent (powder) is non-toxic, non-flammable, does not corrode steel bars, and does not crystallize sodium sulfate in winter

Water-reducing agent can reduce the water consumption of concrete mixtures and improve the strength and durability of concrete. Impermeability; improve the workability of concrete, improve construction speed and construction quality, meet the requirements of mechanized construction, reduce noise and labor intensity, save cement consumption, etc.

How to use water reducing agent

1. Find the optimal dosage through experiments. The recommended dosage is 1.5-2%;

2. Add HSB and mixing water to the concrete together. You can also use post-addition to add HSB concrete. Extend stirring for 30 seconds;

3. Due to the large water reduction rate of HSB, before the initial setting of the concrete, a layer of yellow slurry will be exuded on the surface, which is a normal phenomenon. The color will disappear after the concrete is pounded and grouted, or the color will disappear naturally after the concrete is strengthened. The color will disappear faster through watering and curing without affecting the internal and surface properties of the concrete. </p