Self-compacting Concrete (SCC) is “a highly flowable, yet stable concrete that can spread readily into place and fill the formwork without any consolidation and without undergoing significant separation.”

SCC is viewed as a major breakthrough in construction. Launched in Japan in late 1980s, it has been widely accepted since then and is now used around the world. It is distinguished from conventional concrete by its extreme deformability without any mechanical intervention. High deformability and stability enables SCC to pass through the tight reinforcement and to fill in the entire formwork under its own weight without vibration or segregation. Its key benefits for the construction industry include an improved working environment, faster construction, less remedial work, and increased overall productivity.

The walls above, standing almost 10m tall, showcase what this specialised concrete can achieve.  These photos were taken from the Villa Maria Winery project.

 

Benefits of SCC to precast concrete producers:

  • Eliminates vibration
  • Reduces noise levels and improves the plant environment for employees and neighbours.
  • Improves labour safety and productivity with faster and easier concrete placement.
  • Reduces capital cost and maintenance on formwork and vibration equipment.
  • Improves form finish and concrete consolidation throughout highly reinforced, thin-walled units and reduces repairs.
  • Increases flexibility in design and orientation of formwork and improves plant productivity.
 

Benefits of SCC for cast-in-place concrete:

  • Eliminates vibration
  • Reduces noise levels at the jobsite
  • Improves labour safety and productivity with faster and easier concrete placement.
  • Reduces health hazards from working with vibrating equipment.
  • Places concrete in areas with congested reinforcement, unusual form geometry or restricted access, where conventional concrete placement would not be possible.
  • Allows you to create more complicated shapes. Gives better definition and detail for patterns or relief work. For example, you can form curved shapes. 

Frequently asked questions:

Why SCC?
The elimination of discontinuous mechanical vibration results in concrete structures with more consistent and reliable properties.

What is the advantage of SCC?
It has high strength and extreme flowability.

What advantages does SCC offer to precasters?
SCC has increased the productivity of those working with precast concrete by: producing superior quality products, eliminating returns and remedial work, increasing the life of the moulds and substantially improving the working environment.

What strengths can SCC achieve?
It is quite normal for SCC to have 60 – 70MPa of compressive strength and up to 100MPa compressive strength is a relatively easy target to achieve.