Effect of Silica Fume in Flow Properties and Compressive Strength of Self Compacting Concrete

Abstract

In the present paper to evaluate performance of Self Compacting Concrete (SCC) by replacing cement with varying the silica fume (SF) percentages. An attempt was made to study the performance of fresh concrete by slump flow test, T500 test and the hardened properties of concrete by compression test. There were four mixes of SCC were made by replacement of cement with various percentages of silica fume from 5 to 20% with an increment of 5%. Tests were carried out to assess the compressive strength of concrete at different ages namely 7, 14 and 28 days. For SCC, super-plasticizer (Conplast SP430) was added in optimized dosage. It was found that replacement of cement by 10% of silica fume with a water to powder (w/p) ratio of 0.8 gave better results on fresh properties and