Performance of Temperature on Compressive and Flexural Strength of High Strength Fiber Reinforced Concrete

Abstract

This research work has investigate the  various strengths at elevated temperature of high strength fiber reinforced concrete (HSFRC). Various strengths considered for investigation are compressive strength, flexural strength. Concrete mix of M60 grade and crimped steel fibers with aspect ratio 50 are used. The fiber volume fraction is varied from 0 % to 5 % with increase by 1 % . It kept in oven for temperature from 100°C to 500°C for 1 hour and tested later. The specimens were casted and  tested as per  I.S. Code. All the strengths are found to be increased continuously up to 100°C temperature with increase in fiber volume fraction then it reduces as temperature increases. The experimental results obtained for various strengths are modeled in terms of the material properties of matrix, fiber, temperature and compressive strength. The mathematical expressions developed for various strengths are presented. The results showed that the loss of concrete strength was significant and reduced with the increase of heating temperature. The results predicted by mathematically modeled expressions are in excellent agreement with experimental results.