Self-Compacting Concrete (SCC) and its Characteristics

Self-compacting concrete (SCC) is a type of concrete that is characterized by its high flowability and ability to self-level and fill the formwork without the need for external vibration. It is commonly used in construction projects where it is difficult to use traditional vibrated concrete. SCC is characterized by the following features:

High Water-Powder Ratio

The high water-powder ratio is the main characteristic of SCC. It is usually between 0.4 and 0.7, which is much higher than traditional concrete. This provides a high level of workability, making it easier to pour and level the concrete without the need for external vibration. The high water content also ensures that the concrete has a smooth finish.

Low Power Component

SCC typically contains a low power component. This means that it has a lower amount of coarse aggregate compared to traditional concrete. The low power component is replaced with a high amount of fine aggregate, which helps to increase the flowability and workability of the concrete.

Cementitious Materials

SCC can contain up to 30% cementitious materials, such as fly ash, slag, or silica fume. These materials help to reduce the environmental impact of concrete production while improving its properties. They also help to reduce the heat of hydration and increase the durability and strength of the concrete.

Surface Finish

SCC has a smooth surface finish due to its high water-powder ratio and low power component. This makes it ideal for use in projects where a smooth finish is required, such as architectural concrete, precast concrete, and concrete walls.

In conclusion, the high water-powder ratio is the main characteristic of SCC. It is a type of concrete that is highly workable, self-leveling, and has a smooth surface finish. SCC is commonly used in construction projects where traditional vibrated concrete is difficult to use.