Effect of combination of micro silica and fly ash in high performance concrete

Abstract

Concrete is the most widely used construction materials in civil engineering industry because of its high
structural strength and stability. Concrete is most important engineering material. By adding or replacing of some of
material may change the properties of concrete. Studies have been carried out to investigate the possibility of utilizing
a broad range of materials as partial replacement materials for cement in the production of concrete.
This present research work is mainly focused on one of such method in which Micro silica is used to improve the
compressive of concrete. It gives the brief information regarding how exactly Micro silica affects strength and
durability parameters like compressive strength and workability of concrete.
In these theses in concrete mixture, cement is first replaced by fly ash by 15%, 17.5%, 20% and for every % of Fly ash,
micro silica should be use as filler material by 5%, 8%, 10% replacement of cement. By limiting the content of fly ash
and micro silica whatever gives better result than normal concrete in terms of strength, workability and durability.
The grade of concrete M50 tested for various percentage of replacement to obtain result.