Abstract:
The need for high-rise buildings has increased in recent years as the population has grown. Hence,
high-strength concrete has grown more popular than standard-strength concrete. However, the
fundamental problem with high-strength concrete (HSC) is that it undergoes numerous undesired
chemical changes and thermal fracture on exposure to high temperatures. This quickly jeopardizes
the use of high-strength concrete in structural applications. As a result of these challenges, it is
necessary to build more thermally stable structures. So, in order to compensate this issue carbon
nanotubes (CNT) are induced in this research. The mechanical properties such as compressive
strength, flexural strength stress-strain response, elastic modulus, Compressive toughness, mass
loss, as well as detoriation caused by the exposure of elevated temperatures were studied. The
analyzed formulation was heated up to 200, 400 ,600 and 800 oC at a heating rate of 5 oC /mint
and then tested for residual conditions. Carbon nanotubes (CNTs) modified concrete showed a
higher compressive strength, elastic modulus, flexural strength, and compressive toughness as
compared to the control specimens. According to the visual inspection modified specimens
showed less cracking at higher temperatures. Moreover, the effect of plastering high strength
concrete with CNTs showed better strength retention on exposure to fire. Conclusively, utilization
of CNTs in high strength concrete is efficient as fire resistance concrete.
