Parametric Study of Fly Ash based Concrete with the Inclusion of Carbon Nanotubes (CNT) A Review

Use of carbon nanotubes (CNTs) and fly ash in concrete has been of significant interest because of the ability of the products to improve the strength and capacity of construction products besides foster the sustainable construction activities. The examination examines experimental research studies that seek to integrate CNTs and fly ash cement-based composite both jointly. They are compressive strength, tensile performance, and microstructural modification and durability characteristics among others. The content of CNT (0.05 -0.2%) cement and levels of fly ash replacement (10 percent -30 percent) and different methods of dispersion are most important to be criticized. Previous studies indicate that even minor proportions of CNTs are also capable of boosting the mechanical and survival properties at a vast magnitude, should they be dispersed frequently among the cement material. Based on the data presented by scholars, optimal dispersion of CNTs is a value in improving load transfer and crack-bridging characteristics of cementitious composite. However, the issue of achieving homogeneous dispersion and high cost of CNTs still remains an issue and can be regarded as a considerable barrier to extensive usage. The impact of the important parameters is clearly presented and outlined in comparative table format as well as graphically. The review also identifies gaps to the research that is currently being utilized, and directions of future research and practice are also discussed.