Document Type : Original Article
Department of Civil Engineering, Puducherry Technological University, Puducherry, India
This paper investigates the potential benefits of Ternary blended High-performance concrete containing Silica fume (SF) and Alccofine (AL) as partial cement replacements. The experimental program contains a total of 14 mixes with a water to binder ratio of 0.4 and varying percentages (0-20%) of Silica fume and Alccofine both as binary and ternary blended. Fresh and hardened properties of concrete were evaluated based on slump, compressive strength, flexural strength, split tensile strength and water absorption tests. Ternary mixes containing SF and AL increased concrete compressive strength by 14-27% and tensile strength by 26-43% compared to the reference mix. Rise in early strength development for all the ternary blended mixes is attributed to the presence of highly reactive alccofine. Higher replacement of Alccofine more than 10% led to a steady decrease in strength due to dilution effect, whereas for silica fume, the strength dilution was gradual beyond 15% replacement. Denser particle packing reduced water absorption in ternary mixes. A mix containing 15% SF and 5% AL showed 65.7% reduction in water absorption compared to reference mix. Synergy assessment were done for all the ternary mixes, peak result was obtained for a mixture containing 10% SF and 10% AL. Based on the experimental data, empirical models were developed and compared with the existing codes and earlier researches. Empirical models proposed in this study have the least Integral Absolute Error (IAE) of 0.47% and 1.55% in predicting flexural strength and split tensile strength based on compressive strength of concrete.