For example, SCC used for a relatively open pour with minimal reinforcement can be designed with flow-ability on the lower end of the spectrum.
The main reasons for this are the consistency of the product, cost of the material, and concerns with formwork pressure.
SCC can best be described as (ACI 237-07 Self-Consolidating Concrete).
While the cost of SCC will vary from market to market, it is generally significantly more than conventional concrete due to the increased material component (cementitious and admixtures) and level of attention required.
However, when compared to other high-performance mixtures, such as high strength concrete, the gap closes significantly.
Thus, a greater commitment is required from the producer to increase resources in areas such as quality control, training, mixture development, equipment and batching/delivery logistics.
The higher per unit volume cost of SCC compared to conventional concrete is often cited as an argument against its use.
Self-consolidating concrete (SCC) is a revolutionary building material that is widely regarded as one of the most significant technological advancements in the concrete industry in years.
Its inherent fresh properties and ability to flow under its own weight opens the door to countless opportunities that would not be possible with conventional concrete.
A slight increase in aggregate moisture content, for example, can transform a robust SCC mix into one with less stability that is prone to segregation.
A higher level of understanding in regards to material selection and proportioning is needed than for conventional concrete.
Its origin dates back to the late 1980s in Japan in response to a lack of labour skilled in the proper techniques of concrete consolidation.