Effect of Superplasticizer in Fresh Properties of Self Compacting Concrete with Silica Fume

Abstract

Self-compacting Concrete (SCC) is a new category of concrete which flows under its own weight. It does
not require any external vibration for compaction. Due to many advantages of this concrete, it is suitable
for the situations where congested reinforcement is used. In this research work self-compacting concrete is
developed using different percentages of silica fume,30% ,40% and 50% by weight of cement as partial
replacement of cement. The strength has been assessed. The research presents result of an experimental
programmed carried out, aimed at investigating of fresh properties of SCC contain silica fume and
superplasticizer. The hardening state properties of the concrete were evaluated. Finally, some hardened
state properties of the concrete were assessed, the water cement ratio was maintained 0.5 for all the mixes.
Properties included workability, compressive strength, all were evaluated. The result indicated that the
medium volume contain of silica fume can be used in SCC to produce good strength concrete with this type
of superplasticizer that originated from waste material. High absorption values are obtained with increasing
amount of silica fume however almost all the specimen exhibits absorption of less than 5%. The result of
mechanical properties compressive strength for 2% have shown significant performance compare with the
control mixes.