Elevated temperature studies on concrete have gained importance since the exposure of concrete members to higher temperatures affects the overall structural stability. This paper explains the behaviour and performance of concrete containing a supplementary cementitious material derived from coir industry, Coir Pith Ash (CPA), when subjected to elevated temperature environments. Concrete specimens with CPA content varying from 0% to 20% were taken into consideration and the specimens were exposed to elevated temperature levels. The heating of specimens was conducted in an electric furnace. The parameters considered for the study includeresidual compressive strength, visual observation, and ultrasonic pulse velocity.Effect of air-cooling and water-cooling regimes were also studied.The test results proved the superior performance of CPA concrete over normal control mix concrete. Among the cooling regimes, the air-cooling method was found to be better than water cooling method. © 2020, World Academy of Research in Science and Engineering. All rights reserved.