A Study on Self-Compacting Concrete at High Elevated Temperatures

The objective of the experiment was to examine the impact of high temperatures on the compressive strength of concrete. Self-compacting concrete represents a significant advancement in the construction industry, owing to its ease of use and practicality. The utilization of waste material in concrete minimizes the environmental issues and waste management-related issues. In general, sugarcane bagasse (SCBA) is used as a fuel to fire furnaces in the same sugar mill, yielding approximately 8–29% ashes containing a large quantity of un-burnt materials, silicon, aluminum, iron, and calcium oxides; the ash thus becomes an individual waste and creates disposal issues. The main objective of this project is to study the consequences of partial cement replacement with slag cement by-product ash (SCBA) and fly ash at different percentages (0%, 10%, 15%, and 20%). Two forty-nine cubes of 150 mm size of design mix concrete viz. M30 was cast. After 28 days curing, later cubes are exposed to various temperatures ranging from 600, 700, 800, 900, and 1000 °C, with various time periods 30, 60, 90, and 120 min. After being heated to the necessary temperatures in the range of (600, 700, 800, 900, and 1000 °C) in a muffle furnace, the samples were cooled at ambient temperature for 24 h while air drying, and then, the cube compressive strength test was performed on them. Based on the findings of this study, self-compacting concrete with a 15% replacement of fly ash and SCBA demonstrated superior performance in terms of compressive strength when compared to normal self-compacting concrete at room temperature.