During his research, Okamura found that the main cause of the poor durability performances of Japanese concrete in structures was the inadequate consolidation of the concrete in the casting operations.By developing concrete that self-consolidates, he eliminated the main cause for the poor durability performance of their concrete.ASTM Committee C09 on Concrete and Concrete Aggregates has begun work toward developing standards for self-consolidating concrete.
As a matter of fact, the intensity of energy applied in the consolidation process is adjusted to compensate most plastic property variation.
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.
This procedure, which is readily used today, relies on the use of the Abrams cone (Figure 1).
The cone is filled in one layer without rodding and the diameter, instead of the slump of the concrete sample, is measured after the cone has been lifted .