“PEDAGOGS”
international research journal ISSN:
2181-3027
_SJIF:
5.449
https://scientific-jl.com/ped
Volume-82, Issue-2, May -2025
4
APPLICATION OF NANOTECHNOLOGIES
IN THE FIELD OF TRANSPORT
Djumabayev Dilmurad Kutlimuratovich
Assistant of the Department of Sciences,
Tashkent State University of Transport, Scientific supervisor
Kasimova Gulnora Abaydullayevna
Associate professor of the Department of Sciences,
Tashkent State University of Transport, Scientific supervisor
Saidaliyeva Shaxlo Samikovna
Assistant of the Department of Sciences,
Tashkent State University of Transport, Scientific supervisor
Abstract:
Nanotechnology is a technique used in the design and construction of
structures by utilizing the properties of materials at the nanoscale. In the past, this
technology was mainly applied in fields such as medicine, biochemistry, and
microelectronics for micro-level operations. However, developments in the field of
nanotechnology have transformed our capabilities and expectations for modifying
material properties, making it applicable in various industries. Nowadays, the use of
nanotechnologies in road construction engineering is steadily increasing. Materials
used in nanotechnology possess specific properties at the nanoscale. These nanoscale
properties of materials are employed in the preparation of nanocomposites.
Keywords:
Nanotechnology, cement-concrete, bitumen, nanophosphor.
Some materials exhibit unique properties that cannot be observed at the
macroscopic scale. Nanotechnology utilizes the properties of materials at the
nanoscale, typically ranging from 1 nm to 100 nm. Road construction is carried out on
a kilometer scale, which raises the question of how nanoscale properties relate to such
large-scale projects. The answer lies in the fact that nanoscale properties can be used
to improve the quality of traditional road construction materials. A small amount of
nanomaterials can enhance large quantities of conventional materials. Nanomaterials
are used in road construction to improve durability, safety, cost-efficiency, and other
road performance characteristics. Nanotechnology involves the use of nanomaterials
that upgrade cement-concrete/bitumen products, making them more sustainable and
reducing environmental pollution.
Nanotechnology is an emerging field of research, and the unique properties of
materials developed with nanotechnology can be effectively utilized in road
construction. Controlling materials at the nanoscale allows for remarkable
“PEDAGOGS”
international research journal ISSN:
2181-3027
_SJIF:
5.449
https://scientific-jl.com/ped
Volume-82, Issue-2, May -2025
5
improvements. Carbon nanotubes (CNTs) are a good example, with tensile strength up
to 100 times greater than that of steel. Nanotechnology can be applied to enhance road
durability, safety, and efficiency. It can be implemented in various aspects of road
construction, including repair works. Using nanotechnology can lead to faster road
construction and increased road performance. Road construction generally includes the
following types of works:
• Cement-concrete road works
• Bitumen roads
• Steel works
• Other miscellaneous tasks
Nanotechnology for Cement-Concrete:
Cement-concrete is an important material for road construction. The significance
of cement-concrete roads is increasing. Chemistry, physics effects, materials science,
construction engineering, and other fields can modify the properties of cement using
nanotechnology. When a small amount of nanoparticles is uniformly mixed with
cement-concrete, the cement particles attract the nanoparticles, accelerating the cement
hydration process. Nanoparticles fill the nanoscale pores in the cement. Calcium
hydroxide promotes the generation of C-S-H (calcium silicate hydrate) in the cement.
The hardness of cement is improved by C-S-H, which also enhances the durability of
cement-concrete.
Nanomaterials used in cement-concrete:
Some important nanomaterials used in cement-concrete include:
Carbon Nanotubes (CNTs):
These are nano-sized tubes made from graphite
carbon. They can be either single-walled (SWNT) or multi-walled (MWNT).
Properties:
(I) CNTs are highly flexible.(II) CNTs are mechanically strong.(III) They are the
hardest and strongest fiber known.The addition of CNTs leads to faster hydration of
cement-concrete. It creates a strong bond between the cement-concrete and the CNTs
themselves. When CNTs are added to concrete, the compressive strength of the
concrete can increase by up to 70%. Adding CNTs to cement-concrete can reduce its
“PEDAGOGS”
international research journal ISSN:
2181-3027
_SJIF:
5.449
https://scientific-jl.com/ped
Volume-82, Issue-2, May -2025
6
thermal conductivity by up to 12%. A key property of CNTs is their resistance to
corrosion in corrosive environments, making them especially useful in marine
conditions.
Nanosilica:
Compared to traditional pozzolanic materials used in concrete,
nanosilica provides higher workability with a lower water-cement ratio. It fills micro-
pores and micro-voids in cement-concrete, allowing for up to 35-40% cement savings.
Use of Nanotechnology in Roads
Roads have long been constructed using bitumen as a binder.
The quality of bitumen can be improved using nanotechnology. Various
nanomaterials can be used to modify bitumen quality. Some of them are listed below:
Improving Bitumen Quality through Nanoclay:
Polymer modifiers used to enhance the mechanical and physical properties of
bitumen are quite expensive, leading to high costs in road construction. To reduce
construction costs, researchers have recently proposed using nanoclay to modify
asphalt. Nanoclay is abundant in nature, making its production cost very low. Only a
small quantity of nanoclay is needed for asphalt modification, so it is possible to
improve bitumen properties at a low cost. Montmorillonite (MMT) is the most widely
used nanoclay for asphalt modification. This nanoclay has a layered silicate structure
composed of a single octahedral alumina layer sandwiched between two tetrahedral
silica sheets. A small amount of nanoclay can significantly enhance the physical
properties of bitumen. Nanoclay-modified bitumen increases the stiffness of bitumen
and improves its resistance to degradation. Additionally, it improves Marshall stability
and indirect tensile strength of bituminous concrete.
Nanophosphors:
Proper road surface illumination is crucial for traffic safety and nighttime
visibility, especially in rural areas. Nanophosphors can solve the road lighting problem
when used with road surface materials like cement concrete, paints, etc.
Nanophosphors with crystalline structures can have size-dependent band gaps that
cause changes in emitted light color (Kelsall et al.). By incorporating nanophosphors
into construction materials, roads can emit light from their surface, enhancing road
safety. Research has been conducted on mixing nanophosphors with concrete, bitumen,
or even road paint. These materials remain luminescent under light exposure.
“PEDAGOGS”
international research journal ISSN:
2181-3027
_SJIF:
5.449
https://scientific-jl.com/ped
Volume-82, Issue-2, May -2025
7
Nanotechnology for Roads in Waterlogged Areas:
Nanotechnology can be applied in road construction in waterlogged areas. It helps
create water-resistant soil by increasing the CBR (California Bearing Ratio) value of
the soil under wet conditions. Preventing capillary rise of water is also beneficial. The
added benefits include extending the road's service life and minimizing maintenance
costs. A salty, nano semi-solid paste dissolves in water. When applied, it forms a
waterproof layer between the flexible pavement and natural soil. In this method, a 50
nm saltwater solution and a 100 nm acrylic copolymer are used. This technique can
increase the lifespan of roads by 1 to 3 years. In a practical design study (Jay et al.),
the thickness of the flexible pavement was successfully reduced from 710 mm to 600
mm using the CBR method. The CBR value of wet soil significantly increased with
saline treatment.
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