Self-Compacting Concrete

For several years beginning in 1983, the problem of the durability of concrete structures was a major topic of interest in Japan

Hajime Okamura; Masahiro Ouchi

2007

Scholarcy highlights

  • For several years beginning in 1983, the problem of the durability of concrete structures was a major topic of interest in Japan
  • The gradual reduction in the number of skilled workers in Japan's construction industry has led to a similar reduction in the quality of construction work
  • One solution for the achievement of durable concrete structures independent of the quality of construction work is the employment of self-compacting concrete, which can be compacted into every corner of a formwork, purely by means of its own weight and without the need for vibrating compaction
  • The prototype of self-compacting concrete was first completed in 1988 using materials already on the market
  • (1) Self-compactability testing method Mix-design method Acceptance testing method at job site New type of powder or admixture suitable for self-compacting concrete the fineness modulus of coarse aggregate FM even if the property of the mortar phase is the same
  • A system by which the ready-mixed concrete industry can produce self-compacting concrete as a normal concrete would seem the most effective since, in Japan, as much as 70% of all concrete is produced by the ready-mixed concrete industry
  • Since a rational mix-design method and an appropriate acceptance testing method at the job site have both largely been established for self-compacting concrete, the main obstacles for the wide use of self-compacting concrete can be considered to have been solved
  • Rational training and qualification systems for engineers should be estab-

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