Self consolidating concrete testing

17-Sep-2019 20:17

In this project, the SCC was mixed on-site and pumped through a piping system to the specified point, located 200 meters away.

On this particular project, the construction time was reduced from 2.5 years to 2 years.

can reduce the water-cement ratio, and the high-range water reducer (HRWR) demand.

The reduction in free water can reduce the concentration of viscosity-enhancing admixture (VEA) necessary to ensure proper stability during casting and thereafter until the onset of hardening.

The importance of self-compacting concrete is that maintains all concrete’s durability and characteristics, meeting expected performance requirements.

In certain instances the addition of superplasticizers and viscosity modifier are added to the mix, reducing bleeding and segregation.

However it is laborious and takes time to remove by vibration, and improper or inadequate vibration can lead to undetected problems later.

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Self-compacting concrete is a non-segregating concrete that is placed by means of its own weight.

As a result, pouring SCC is also much less labor-intensive compared to standard concrete mixes.

Once poured, SCC is usually similar to standard concrete in terms of its setting and curing time (gaining strength), and strength.

Self-compacting concrete has been used in bridges and even on pre-cast sections.

One of the most remarkable projects built using self-compacting concrete is the Akashi-Kaikyo Suspension Bridge.Self-compacting concrete with a similar water cement or cement binder ratio will usually have a slightly higher strength compared with traditional vibrated concrete, due to the lack of vibration giving an improved interface between the aggregate and hardened paste.

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