EXPERIMENTAL INVESTIGATION ON STRENGTH CHARACTERISTICS OF SILICA FUME BASED HIGH PERFORMANCE CONCRETE WITH STEEL FIBER AND POLYPROPYLENE FIBER

H.M.Somasekharaiah, Adanagouda, Basavaraj.K.S

Abstract: Cement is the most popular material used in construction, recent trend is in concrete cement is replaced by admixtures such as GGBS, fly ash, slag, silica fume and metakaolin to improve the characteristics of high performance of concrete in order to reduce the creep and shrinkage and to improve tensile strength, fibers are added. The scope of present investigation deals with the strength properties of high performance concrete, on the effect of partial replacement of cement by silica fume with different percentages viz 0%, 10% and 20% was used in the concrete mix containing composite fibers (steel and polypropylene) of different percentages viz 0%, 0.50%, 0.75% and 1% steel fibers and 0.25% polypropylene fiber constant for all silica fumeconcrete mixes on the properties of high performance concrete. An aggregate binder ratio of 2.5 and different water binder ratio viz 0.30, 0.35 and 0.40 with super plasticizer of 0.6% by weight of binder was used in this investigation. Each series consists prisms, cylinders and cubes as per IS standard. The tests are conducted to find out the flexural strength, split tensile strength and compressive strength at the age of 7 days and 28 days.

Keywords: silica fume, steel fiber, polypropylene fiber, super plasticizer, strength properties

DOI: https://doi.org/10.15623/ijret.2015.0410055