What is concrete bleeding and segregation

1. Concrete bleeding

Concrete bleeding refers to the concrete being transported, vibrated, and pumped During the transportation process, the coarse aggregate sinks and the water rises. Usually, bleeding is the prelude to segregation, which will inevitably lead to stratification and increase the possibility of pump blockage. A small amount of bleeding is allowed during the project to prevent cracks on the concrete surface.

Main methods to solve concrete bleeding

Concrete mix ratio solution

Increase the amount of cementitious materials, increase the sand content of the concrete, and allow the concrete to entrain appropriate amounts of air while satisfying other properties. On the premise of ensuring construction performance, the unit water consumption should be reduced as much as possible.

2. In terms of raw materials

Select finer cementitious materials and high-quality primers. Aerosol.

3. In terms of water reducing agent

Choose concrete with less bleeding and greater fluidity High-efficiency water reducing agent. If the mix ratio is fixed, and if the standards and usage requirements are met, the amount of water-reducing agent with appropriate water reduction rate should be selected to avoid bleeding caused by excessive water reduction rate.

2. Concrete segregation

Concrete segregation is simply the difference between coarse aggregate and fine aggregate. Aggregate separation usually manifests as the separation of coarse aggregate and mortar from each other. For example, dense particles are deposited at the bottom of the mixture, or coarse aggregate is separated from the mixture as a whole. </p