What could be a solution to the problem of excessive bleeding in concrete?

Excessive bleeding in concrete refers to the phenomenon where water rises to the surface after concrete has been placed. This can compromise the integrity and finish of the concrete, leading to various issues such as weak surface layers and poor bonding with other materials.

Increasing the sand mix or increasing cement content can effectively address excessive bleeding. By adjusting the sand content, the overall grading of the concrete can be optimized, allowing for better water retention within the mix rather than allowing it to migrate to the surface. Sand has a larger surface area that absorbs water, which can help mitigate bleeding. Additionally, increasing the cement content enhances the binding capabilities of the mixture, resulting in a denser concrete that is less prone to excessive water movement.

Thus, the strategic choice to increase sand or cement content is a proactive approach to improve the characteristics of the concrete mix and manage water more effectively during the curing process.