The Effects of Incorporating Hybrid Fibers in Self Compacting Concrete using Flyash

Self-Compacting-Concrete(SCC) is a highly flowable, non-segregating concrete without bleeding that can be placed with little or no vibration. In this project the mineral additive fly ash is used with 50% by weight of cement along with micro steel fibers and nylon fibers in combination.The ratios are of 0/0,0.1/0.1,0.2/0.1,0.3/0.1 and 0.4/0.1 where volumeof micro steel fibres used are varied while volume of nylon fibres are kept constant. The workability of SCC are attained by conducting the Slump flow, V funnel and J-Ring tests. The impact, water absorption and temperature effect tests are carried out for all mix proportions and it has resulted that S 0.3/N 0.1 as the optimum mix when compared to other fibre combinations.