Iranian Specialists Manufacture Quake-Resistant Structures with Self-Compacting Nano-Concrete

“The use of nanoparticles in concrete structures reduces cross-section dimensions, lightens the structure, and maximizes space utilization, which is why this type of concrete is very suitable for high-rise buildings and special projects,” said Mohammad Javad Mohammadi, a manager at the knowledge-based company.

He elaborated on the components of self-compacting nano-concrete, and said, “This concrete uses pozzolanic minerals such as silica fume and zeolite at the nanoscale. The pozzolanic activity of these materials should be even higher than international standards to achieve optimal performance. In addition, nanoscale chemical additives such as colloidal silica or polycarboxylate ether are also used to improve the rheological properties and increase the density of concrete.”

“Compared to conventional concrete, the 28-day compressive strength of self-compacting nanoconcrete has increased by 2.3 times, the flexural strength by 2.8 times, the electrical resistivity by 5.6 times, and the bond strength of steel bars with concrete by 2.2 times. These results show that nanotechnology can make a serious difference in the mechanical performance and durability of concrete,” Mohammadi said.

“Improving the microstructure of concrete and reducing pores are among the main advantages of using nanoparticles,” he underlined.

“Nanoconcrete enjoys a higher density due to the improvement of the transition zone between cement paste and aggregate, and has a very high resistance to water penetration. These features increase the service life of the structure and reduce maintenance costs,” Mohammadi said.

In a relevant development in June 2023, a nanotechnology firm in Iran had also used inorganic nanoparticles to produce wear-resistant concrete flooring suitable for construction industry.

‘Behdis Saman Amin’ company has made the product which is a well-engineered concrete whose operational properties are improved by adding oxide nanoparticles. It is used for building constructions and industrial applications.

Adding the inorganic nanoparticles to the cementitious matrix has resulted in enhanced compressive, bending and tensile strengths in the product, strongly improved its durability and reduced its permeability.

The product can be used in building blocks, constructions and apartments, and industrial facilities.

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