A rational mix design procedure for self compacting concrete

Abstract

Self Compacting Concrete (SCC) is a concrete, which fl ows and compacts only under gravity. It fi lls the mould completely without any defects. Usually self-compacting concretes have compressive strengths in the range of 60 - 100 N/mm2 . However, lower grades can also be obtained and used depending on the requirement. SCC was originally developed at the University of Tokyo in Japan with the help of leading concrete contractors during 1980’s to be mainly used for highly congested reinforced structures in seismic regions (N. Bouzoubaa and M. Lachemi, 2001). As durability of concrete structures was an important issue in Japan, adequate compaction by skilled labors was required to obtain durable concrete structures. This requirement led to the development of SCC. The work on SCC was fi rst reported in 1989 (H. Okamura and K. Ozawa, 1995).