Effect of GGBS and Nano Silica on the Mechanical Properties of Ternary Concrete

Abstract

This paper presents the effect of mechanical behavior of high strength concrete, prepared using Ground Granulated Blast Furnace Slag (GGBS) and Nano Silica (Average particle size-15nm). Ground Granulated Blast Furnace Slag (GGBS) was replaced up to 50% and Nano silica was replaced 1%, 2%, 3%, 4% and 5% by weight of cement. Compression Testing, Pull Out Testing, Split Tensile Testing and Flexural Testing were carried out to characterize the mechanical behavior of high strength concretes at 7, 28, 56 and 90 days and results obtained were compared with the corresponding values obtained for controlled concrete (100% OPC). The entire specimen were prepared, cured and tested as per the Indian standard code of practice. The results showed that compressive strength significantly improved at early age with the increasing content of Nano silica. Compressive, tensile and flexure strength of the concrete with GGBS and NS was found better than that of the controlled concrete. Utilization of this type of material into the public sphere through civil infrastructure can be done by its usage in Dams and High rise buildings where dense concrete is required.