The hazards of concrete segregation

Segregation is a common phenomenon in concrete, which can easily lead to pipe blockage and explosion during the pumping process after segregation. When pouring on the formwork, structural separation is prone to occur, and a mortar layer may appear on top. The surface of the concrete is also prone to quality problems such as honeycombs, pits, and voids.

The hazards of concrete segregation can generally be divided into the following categories:

1. The segregation phenomenon of concrete can have a negative impact on its pumping construction process. Due to this phenomenon, it can easily lead to pipe blockage and explosion, prolong the construction period, increase the investment of funds, and thus reduce the economic benefits of the project.

2. The segregation phenomenon of concrete can also have a certain impact on the formation effect of its structure, and due to this phenomenon, it is easy to cause sand lines and other defects on its surface.

3. The segregation phenomenon of concrete can also reduce its own strength to a certain extent, thereby reducing its load-bearing capacity and structural performance, making it easy to cause different degrees of shrinkage in multiple parts, leading to cracks during the shrinkage process. Especially when implementing floor slab operations, if segregation occurs, it is likely to cause significant thickening of the surface cement slurry. Therefore, during shrinkage, it will show an increasing trend in a very short period of time, causing it to crack, which to some extent reduces its impermeability and cold resistance characteristics, and thus cannot play its important role.

So, when solving the problem of concrete segregation, measures such as controlling cement, controlling external additives, and controlling fly ash and aggregates can be taken. In order to prevent the occurrence of new concrete segregation, it is necessary to conduct reasonable research based on the causes, and then treat them separately according to the actual situation, so as to effectively prevent the occurrence of segregation and achieve the important role of concrete.

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