Development of mathematical model of ternary blended steel fibre reinforced concrete subjected to elevated temperature

This paper an experimental investigation is described on the mechanical properties of steel fiber reinforced concrete with 30% replacement of cement by Fly ash + ground granulated blast furnace slag making it ternary blended and then subjected to elevated temperature of 200°C or 400°C or 600°C or 800°C or 1000°C as the case may be for 3 hours.. From the experimental investigation it is concluded that the steel fiber reinforced ternary blended concrete subjected to such as 200°C, 400°C, 600°C, 800°C and 1000°C for 3 hours with 30% replacement of cement by FA+ GGBFS (in proportion of (10+20)) shows improved resistance to temperature. The mathematical models are developed for the strength characteristic of ternary blended steel fibre reinforced concrete when subjected to different sustained elevated temperatures. The best fit biquardratic polynomial equations are obtained for compressive strength, tensile strength, flexural strength. The equations generated will help in finding out the strength of ternary blended steel fibre reinforced concrete at any desired temperature.