Problems that may be encountered during the use of polycarboxylic acid water reducer

Polycarboxylic acid water-reducing agent is an important building material widely used in concrete engineering. 

It can improve the performance of concrete to a certain extent under reasonable use. 

However, once it is used improperly, some problems will be encountered. 

Next, let's take a look at some problems that may be encountered in the use of polycarboxylic acid water reducer.

1.Concrete with polycarboxylic acid superplasticizer is difficult to unload from the mixer.

Reason: It may be caused by the incompatibility of cement and polycarboxylic acid superplasticizer.

Treatment method: At the time of recombination, the use of each batch of cement before opening plate 

should be combined with a recombination experiment, or the use of polycarboxylic acid water reducing 

agent to add meloxin admixture, improve the content.

2. Slump of concrete mix suddenly becomes large or refreshing.

Reason: This situation shows that the adaptability of cement and water reducing agent is not very good.

Treatment method: The amount of admixture should be adjusted appropriately.

3. Bubbles appear on the surface of the cement after hardening

Reason: In order to facilitate construction, the dosage of polycarboxylic acid water-reducing agent is increased.

Treatment method: In the process of compounding, construction should be strictly in accordance with the mix ratio,

improve the construction technology, strengthen the construction management.

4, concrete setting and hardening slow

Reason: Increased dosage of polycarboxylic acid water reducer or insufficient curing temperature.

Treatment method: strictly in accordance with the mix ratio of construction, prolong the maintenance time.