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

Views: 3     Author: Site Editor     Publish Time: 2023-04-27      Origin: Site

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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.

Problems that may be encountered during 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.


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