Effect of Silica Fumes used as replacement of cement on compressive strength of concrete

The world is progressing and this progress requires both technological and infrastructure development. Still this development should not be on the cost of non-renewable resources, moreover it should not result in biological waste. Concrete is a major concentration material which is the combination of many materials may consist of the byproducts of the other processes called Supplementary cementitious material (SCM). The SCMs have the ability to switch specific amount of cement and still ready to show building material property, therefore reducing the value of victimization hydraulic cement. The waste materials, which can be used as SCMs like ash, silica oxide fume, ground granulated blast furnace slag, steel slag etc. The use of those byproducts not solely helps to utilize these waste materials however also enhances the properties of concrete in fresh and hydrated states. Micro silica or silica fumes, a very fine non-crystalline material is very good as filler material to provide good strength. In this study a trial has been created to extend the strength of concrete by exchange cement with 0%, 5%,10%,15% and 20% for silica fumes. The compressive strength was checked for the mentioned design mixes. It is found that an optimum replacement of V-day of small silica oxide to it of cement (by weight) will increase the strength of concrete to half-hour. Further addition of small silica oxide shows a decreasing trend.