Residual Compressive Strength of Recycled Brick Aggregate Concrete at High Temperatures

-Utilization of construction debris as recycled aggregates in the production of concrete is gaining momentum nowadays due to the availability of large quantity of demolition waste. The recycled brick aggregate (RBA) concrete is made used for the production of low grade recycled aggregate suitable for concrete production. The risk of concrete structures exposed to fire is also on the increase due to the increased fire accidents and blasts. This paper presents the results of an experimental investigation on the effects of high temperatures on the properties of a standard RBA concrete mix made with 25% of crushed clay bricks as the coarse aggregate. The concrete cubes were casted with crushed clay brick and granite aggregate. The specimens of both RBA and Granite aggregate (GA) concrete were subjected to temperatures ranging from 100 C to at an interval of 100 C for duration of Three hours. The compressive strength of both the concretes before 1000 C and after exposure to high temperatures was compared to assess the relative performance. The results showed that RBA concrete preformed better than GA concrete at high temperatures. Keywords-Recycled Brick Aggregate, Granite Aggregate, Concrete, High Temperatures, Colour Change, Crack Pattern, Weight Loss, Compressive Strength.