People working in the construction industry are no strangers to water-reducing agents. They come into contact with them every day. However, the method of using them may not be correct. So, how to use water-reducing agents better? In fact, water-reducing agents are used in Used in construction throughout the year, water-reducing admixtures refer to admixtures that can reduce the amount of mixing water, increase the strength of concrete, and save the amount of cement while maintaining the workability of concrete and the amount of cement.
Water-reducing agent is actually a part of the role of cement materials in the performance ratio of use. It is to reduce the use of water and improve the role of the material. Reducing the use of water is to a certain extent. To improve the function of cement, the amount of admixture directly determines the function of cement material. Only the appropriate dosage can make the material perform the required function.
According to its water-reducing and strengthening capabilities, it is divided into ordinary water-reducing agents and high-efficiency water-reducing agents. Ordinary water-reducing agents are suitable for concrete construction with low temperatures above 5°C. High-efficiency water-reducing admixtures are suitable for concrete construction at low temperatures above 0°C, and are suitable for preparing high-fluidity concrete, high-strength concrete and steam-cured concrete.
Factors affecting the durability of water-reducing agents
1. Chemical factors
Chloride ions are an important factor affecting the durability of concrete, because chlorine atoms can damage steel bars. It plays a special destructive role. When chlorine atoms exceed the standard, the steel bars will be corroded and the concrete will crack. Under the influence of water vapor, the steel bars will corrode faster, thus seriously affecting the durability.
2. Raw material factors
Among the raw materials, alkali is also an important factor affecting the durability of concrete. Alkali-aggregate comes from cement, fly ash, water reducing agent, etc. The alkali-aggregate reaction will destroy the concrete structure and is the main cause of dam damage, so it is very important to control the alkali content.
3. Human factors
The rest include porosity, water consumption, stirring, protective measures, etc., which will affect the durability, but it is relatively easy to control, as long as you have experience Master, this kind of mistake usually doesn't happen.
Through the above description, we can understand how to use water reducing agent to play a better role. The water-reducing agent can effectively reduce the early hydration heat of cement, which is beneficial to large-volume concrete and summer construction. It has excellent adaptability, good compatibility with cement and admixtures, and good temperature adaptability. It has good characteristics with different types of cement and admixtures. Good compatibility solves the problem of poor compatibility between other types of water reducing agents and cementitious materials.
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