USE OF NANOMATERIALS IN CIVIL ENGINEERING- A REVIEW
Recently, the use of nanomaterials is increasing day by day in the various fields such as biomedicine, automobile, electronics, robotics, construction industry etc. This is mainly because of unique mechanical, chemical, electronic and optical properties of nanomaterials. Particularly, construction industry may possibly be one of the chief beneficiaries of these materials, because the properties of concrete, steel, glass and other building materials will improve with the applications of nanomaterials. Therefore, the potential use of nanomaterials such as carbon nanotubes, Cu nanoparticles, Ag nanoparticles, TiO2, SiO2, Al2O3, ZrO2, and Fe2O3 nano-oxides for enhancing the mechanical strengths and durability of concrete have been explored in the current study. It has been observed that the addition of nanomaterials would improve the corrosion resistance, abrasion resistance, compressive strength, tensile strength, flexural strength etc. of cementitious composites. However, the exact mechanism responsible for improvement in the characteristics of nano based cementitious materials is not clear so far. Thus, more researches and investigations are required in order to use the nanomaterials in civil engineering and construction sector effectively.
Key words: nanomaterials, construction industry, concrete, mechanical strengths, durability