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Once poured, SCC is usually similar to standard concrete in terms of its setting and curing time (gaining strength), and strength.
SCC does not use a high proportion of water to become fluid - in fact SCC may contain less water than standard concretes.
This problem can now be solved with self-compacting concrete.
This type of concrete flows easily around the reinforcement and into all corners of the formwork.
This kind of air content (unlike that in aerated concrete) is not desired and weakens the concrete if left.
However it is laborious and takes time to remove by vibration, and improper or inadequate vibration can lead to undetected problems later.
Self-consolidating concrete (SCC) or self-compacting concrete, as its sometimes known, arrived as a revolution in the field of concrete technology.
The concept was proposed by Professor Hajime Okamura of Kochi University of Technology, Japan, in 1986 as a solution to the growing durability concerns of the Japanese government.
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 (without external compaction), and thereafter until the concrete sets).
ASTM Committee C09 on Concrete and Concrete Aggregates has begun work toward developing standards for self-consolidating concrete.
Martin Vachon describes how a special type of concrete self-consolidates without the use of vibration, its market share around the world, and the work of C09 in writing standards for it.
Very simply, SCC is simply a mix that is optimized for flow characteristics.
Just as all concrete mixes should be carefully designed to achieve the required performance characteristics, properly placed and properly cured so should SCC.