Concrete water-reducing agent is a chemical additive commonly used in concrete. Its function is to reduce
the amount of cement in concrete without affecting the strength of concrete, thus reducing the cost of concrete.
This paper will introduce the type, principle and application of concrete water reducing agent.
There are many kinds of concrete water reducing agent, according to its chemical composition and principle
of action can be divided into organic water reducing agent, inorganic water reducing agent,
high efficiency water reducing agent and so on. Organic water reducing agent can be divided into aliphatic,
sulfonate, phenolic resin and other different types, inorganic water reducing agent including expansion agent,
passivation agent, high efficiency water reducing agent is currently commonly used in a water reducing agent,
often used in industrial and civil buildings.
The action principle of concrete superplasticizer is to change the reaction mechanism of cement hydration
and the surface charge state of cement particles, so as to reduce the amount of concrete cement,
reduce the water-cement ratio, improve the strength of concrete, improve the fluidity of concrete and so on.
Concrete water-reducing agent can generally reduce the cement dosage of concrete by about 10%,
and the concrete strength, impermeability, etc., is not affected.
The use of concrete water reducing agent also needs to pay attention to. Generally speaking,
before the use of concrete water reducing agent, the raw materials of concrete need to be tested
to ensure that the design of concrete mix meets the requirements of the code. The dosage of water
reducing agent should be determined according to the fluidity of concrete, environmental temperature
and special requirements of concrete and other factors to ensure the ideal effect of water reducing agent.
In addition, concrete water reducing agent in the storage and use process also need to pay attention to moisture-proof,
prevent mixed impurities and other problems.
Concrete water-reducing agent is a very important chemical additive in concrete engineering.
The correct use of concrete water-reducing agent can not only reduce the cost of concrete,
but also improve the performance and quality of concrete, so as to ensure the safety and reliability of concrete engineering.