Paper Details

The structural behaviour of concrete subjected to elevated temperature due to fire is governed by range oftemperature, duration of temperature, and material properties of concrete. The reduction in compressive strength ,crackformation, spelling phenomenon, adverse effect on reinforcement etc. are some of the effects on concrete due to elevatedtemperature. The mechanical properties of concrete, physical and chemical responses of constituents of concretevariation in thermal gradients during the fire and post fire cooling operations are responsible to govern the structuralbehaviour of concrete. Very less study is reported indicating the comparison of effect of elevated temperature, the methodof cooling for different types of concrete such as concrete with M20.The investigations were carried out on thecompressive behavior of M20 .Cubes of 150mm X 150mm X 150mm size were cast using M20 grade of concrete.Specimens were heated in oven at temperature of 150o C and 250o C for 2 hours. Some of specimen were tested wereallowed to cool on their own by natural cooling while, remaining were quenched in water to provide maximum thermalshock by jet cooling. This specimen was tested for compression in compression testing machine (C.T.M) up to first crackloading. Effect of this on compressive strength was compared with control specimen. The weight loss increases as thetemperature increases and percentage weight loss was in natural cooling. The percentage loss in compressive strengthwas more in case of natural cooling as temperature cooling as temperature increases. In meeting this objective theeffects of elevated temperatures on the properties of ordinary Portland cement concrete constituent materials andconcretes are summarized. The effects of elevated temperature on high-strength concrete materials are noted and theirperformance compared to normal strength concretes. A review of concrete materials for elevated temperature service ispresented. Nuclear power plant and general civil engineering design codes are described. Design considerations andanalytical techniques for evaluating the response of reinforced concrete structures to elevated-temperature conditionsare presented. Pertinent studies in which reinforced structural elements were subjected to elevated temperatures aredescribed.

Miss. D. S. Yewale, Mr. D. B. Pawar, Miss. Pallavi Sathe, “A paper on compressive strength of concrete subjected to elevated temperature”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 16, pp. -, January 2018.