What is the purpose of self compacting concrete?

Abstract. Self-compacting concrete (SCC) has many benefits in terms of production and placement compared to traditional concrete namely, elimination of external or internal vibration for compaction, better flowability, workability and pumpability, as well as increased bonding with congested reinforcement.

What is a self compacting concrete mix?

Self-consolidating concrete or self-compacting concrete (SCC) is a concrete mix which has a low yield stress, high deformability, good segregation resistance (prevents separation of particles in the mix), and moderate viscosity (necessary to ensure uniform suspension of solid particles during transportation, placement …

Is self compacting concrete more expensive?

Self-compacting concrete mixes are typically more expensive, but require less labour than conventional concrete to place. Therefore material costs are lower than self-consolidating concrete.

What are disadvantages of self compacting concrete?

Disadvantages of Self-Compacting Concrete:

• Material selection is more strict.
• Construction costs increase, compared with regular concrete.
• Many trial batches and laboratory tests are required to use a designed mixture.
• Higher precision is required when measuring and monitoring.

What are the basic properties of self compacting concrete and the factors which affects those properties?

The three properties that characterise a concrete as self-compacting Concrete are Flowing ability—the ability to completely fill all areas and corners of the formwork into which it is placed Passing ability—the ability to pass through congested reinforcement without separation of the constituents or blocking Resistance …

What are the fresh properties of self compacting concrete?

Can self compacting concrete be vibrated?

Self-compacting concrete (SCC) is a flowing concrete that does not require vibration and, indeed, should not be vibrated. It uses superplasticisers and stabilisers to significantly increase the ease and rate of flow.

Is self compacting concrete economical?

A benefit-cost ratio greater than 1 would suggest the use of self-compacting concrete is an economical option. The high cost of SCC when compared to conventional concrete is counteracted by the benefits it provides.

How do you build a self compacting concrete?

A simple tool has been designed for self compacting concrete (SCC) mix design with 29\% of coarse aggregate, replacement of cement with Metakaolin and class F flyash, combinations of both and controlled SCC mix with 0.36 water/cementitious ratio(by weight) and 388 litre/m3 of cement paste volume.

What do you mean by durability of concrete?

Durability of concrete may be defined as the ability of concrete to resist weathering action, chemical attack, and abrasion while maintaining its desired engineering properties. For example, concrete exposed to tidal seawater will have different requirements than an indoor concrete floor.

Which test measure the stability of self compacting concrete?

Column / Probe segregation test: It is used to measures the stability of Self-Compacting concrete. In this test, The value of the segregation ratio is measured.