FRP rebar has been used in the construction industry for over 100 years. FRP rebar is used for the strength of concrete structures. Although steel rebar has many characteristics, it suffers from a lot of damage such as corrosion and rust when exposed to environmental conditions such as high humidity, extremely cold or hot environments, alkaline or acidic conditions, salts in the air, etc.
Alternatively, FRP rebar or composite rebar can be used to reduce problems caused by environmental conditions. Many efforts have been made to produce fiber-reinforced polymer composite bars with unique properties, and by using high-performance fibers, they can be produced as structural reinforcement and tailored to the application field. Also, with a low weight, these rebars can hold a structure with great strength.
Advantages of frp rebar
In the past, rebar used in concrete structures would corrode and rot after some time due to exposure to ambient air.
The combination of the three factors of humidity, increased temperature and chloride environment reduces the effect of alkalinity of concrete and ultimately leads to corrosion of prestressed steel and rebar and the corrosion process occurs. Therefore, experts resort to FRP rebar and replace it with steel rebar because it has high advantages.
Some advantages of FRP rebar are
- The use of composite coated rebar has made concrete structures more resistant and no longer corroded
- The presence of shear resistance and also the presence of adhesion between these reinforcement bars may affect the mechanical properties of concrete. FRP rebar components
FRP rebar is actually a type of composite material that is produced from high-performance fibers embedded in polymer resin. These materials have insulating electromagnetic properties and do not suffer from corrosion problems. For this purpose, FRP rebar is used to strengthen concrete structures and solve corrosion problems to a great extent. Also, these rebars have superior properties such as the high tensile strength of FRP structures, making them suitable for use as a strengthening element for concrete structures.
Using FRP rebar to strengthen the building
FRP rebar is used to strengthen the building. The practical objectives of frp reinforcement are that before strengthening the concrete structure, it is necessary to first consider and verify the strengthening characteristics of frp bar in order to establish the applicability according to the use and its compatibility based on the designer’s opinion.
The natural corrosion resistance of FRP-reinforced concrete structures is of great benefit to structures, meaning that structures such as marine structures, bridge decks and structures exposed to crystalline salt environments are susceptible to severe corrosion.
In MRI parts or other equipment sensitive to electromagnetic fields, it is non-magnetic and has various other advantages.
Is fiberglass rebar as good as steel?
In general: GFRP rebar has higher tensile strength and corrosion resistance than steel rebar, in addition to having moderate bending strength, and these properties make GFRP a suitable alternative to steel in foundation applications.
FRP is actually a stronger material than steel, and despite being a very lightweight material, it has a much stronger system. Hence FRP is able to maintain its high strength while being a very lightweight material.
Disadvantages of FRP rebar compared to its advantages
Some of the advantages of using composite rebar in WWII are:
It has high resistance and light weight than composite materials, and it is one of the most important elements used in the military industry, especially in the air and space industry.
According to the previously mentioned advantages, composite materials were used during the Cold Wars and are used in the military, aerospace and aviation industries.
As a result, the use of composite structures in practical and industrial fields was considered, and composite was used for the first time in the design and production of golf clubs and fishing hooks.
One disadvantage of composite rebar is that data on its compressive strength should not be relied upon when using FRP rebar. Recently obtained information indicates that the compressive modulus of FRP rebar is lower than the tensile modulus.
The combination of mechanical behavior with FRP rebar as well as the low modulus of these rebars compared to steel, results in them receiving the largest share of compressive stress, so you should not consider FRP rebar as reinforcement for a concrete column or structure.
conclusion
The best FRP or composite rebar can be obtained from the Bekran Sazan website, which has high strength and resistance.
FRP (Fiberglass Reinforced Polymer) is a helical structural reinforcement bar made from a combination of roving fiberglass and resin. By using the theory of experienced experts in the field of steel reinforcement, Pekran Sazan Company has been able to make greater strides in the field of building strength. To learn about methods of strengthening columns, you can also read the article “How are concrete columns strengthened with carbon fiber?” Read on for more information.