Self-Compacting Concrete



Self-compacting concrete (SCC) is a type of concrete that can flow and compact itself under its own weight without the need for external vibration. This type of concrete is highly fluid and has a high deformability and filling ability, which makes it suitable for use in complex and intricate concrete structures.

In India, SCC has gained popularity in recent years due to its numerous advantages such as improved durability, reduced labor and equipment costs, enhanced workability, and increased productivity. SCC is being used in various applications in India, such as high-rise buildings, bridges, dams, and other infrastructural projects.

The use of SCC in India has also contributed to the reduction of environmental impact due to its ability to reduce the amount of cement and water used in the construction process. Additionally, SCC has been shown to result in better surface finishes and reduced noise pollution during construction.

Overall, the adoption of SCC in India is expected to continue to grow as more construction professionals recognize its benefits and as advancements in its production and application continue to be made.

Self compacting concrete is a concrete that fills uniformly and completely every
corner of formwork by its own weight without application of any vibration,
without segregation, whilst maintaining homogeneity.
APPLICATION AREA
Self compacting concrete may be used in precast concrete applications or for
concrete placed on site. It may be manufactured in a site batching plant or in a
ready-mixed concrele plant and delivered to site by truck mixer. It may then be
placed either by pumping or pouring into horizontal or vertical forms.

FEATURES OF FRESH SELF COMPACTING CONCRETE
The following are some oflbe features of self compacting concrete:
a) Slump flow: 600 mm, Min.
b) Sufficient amount of fines « 0.125 mm) preferably in the range of
400 kglm' to 600 kgtm'. This can be achieved by having sand content
more than 38 percent and using mineral admixture to the order of 25
percent to 50 percent by mass of cementitious materials.
c) Use of high range water reducing (HRWR) admixture and viscosity
modifying agent (VMA) in appropriate dosages.

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