Brief note on Self Compacting Concrete
In large and sophisticated construction projects, congestion of bars may be a quite common phenomenon. It becomes very tough to compact concrete with vibrators. Also, segregation takes place during placing the concrete within the formwork. this example are often tackled with highly workable concrete. Highly workable concrete features a slump of over 650 mm-800 mm. Their testing (Slump flow test rather than normal slump test) and quality assurance procedure is different from normal concrete.
Self-Competing Concrete is additionally referred to as self-consolidating concrete. during this article, we'll discuss the definition of self-compacting concrete along side the sensible application field of it.
What is Self-Consolidating or Self-Competing Concrete?
Self Consolidating or Self Compacting Concrete (SCC) may be a highly flowable, deformable, non-segregating concrete that spreads and fills within the formwork under its own weight. Flowability is maintained by employing a high range of water-reducing admixtures.
Stability (avoiding segregation) is increased by using admixtures or increasing the amount of fine aggregates within the plastic concrete. This also changes the viscosity of the mixture.
SCC features a more improved interface between aggregate and cement paste. It increases the strength of concrete.
Self-compacting concrete also can be defined as a mixture balancing the fluidity and resistance to segregation where those two properties are conflicting with one another . A balanced equilibrium should be maintained between them.
Application of Self-Competing or Self-Consolidating Concrete
The followings are the applications of self-consolidating/compacting concrete.
- Areas of congested reinforcements.
- Bridges and precast sections.
- Drilled shaft columns, earth retaining structures.
- High concentration rebars where normal tempering or vibrating is difficult.
- Manufacturers of concrete pipes.
- Flow in closed spaces-pipes (during pumping).