Description:Compaction of concrete is the traditional work during the casting of concrete members of the structure. No matter what type of building structure it is, the concrete used should be strong enough and well-compacted. The main objectives of compaction are to ensure getting maximum density by removal of any entrapped air and to ensure that the concrete used is in full contact with both the steel reinforcement and the formwork. Ensuring the above two points not only provides additional strength to the structure but also does benefit the appearance of the final product.
The compacting of conventional concrete is performed through the external force of vibrators shown in the figure below. However, the vibrators are incapable of reinforced intensive engineering, deep structural members, and wall element, where the concrete block, segregation, bleeding, and settlement will take place. As a result, mechanical properties, durability, and quality of the surface finish of the concrete are reduced. Furthermore, if the workability is poor, the high quality of infrastructure construction depends more on skilled workers, and more energy is needed to form concrete shapes. Therefore, it is important to develop concrete with good workability, especially self-compact ability.
This report will provide a brief introduction to self-compacting concrete (SCC) with attention to its definition, classification, advantages, tests, and applications.