Chemical enterprises and power plants (thermal, nuclear, hydraulic, solar, etc.) — construction sites, the exploitation of which is accompanied by increased risks. They carry a potential danger to humans, so erection and restoration must be carried out according to regulations and standards. Concrete elements and structures are carefully reinforced, and composite fiberglass rebar helps in this.
A few years ago, concrete was strengthened solely with steel bars of optimal diameter. This increased the strength of the structure, made the products reliable and invulnerable to the impact of external factors. But scientists did not stop looking for a solution to such a problem as the susceptibility of steel to corrosion.Composite fiberglass rebar replaced the metal.
The reasons for the active use of fiberglass in the construction of chemical plants and power plants:
Chemical resistance is one of the main advantages of fiberglass rebar, especially when it comes to the construction of manufacturing plants, factories, power plants. Composite products are inert to acidic and other aggressive elements (solvents, bitumen, salt compositions, paints).
Fiberglass rebar can be used in areas where soil is characterized by increased alkalinity or acidity. Foundations, piles, columns, plates and other structures will retain the original technical and operational characteristics even with partial deformation of concrete.
It is worth paying attention to the fact that thermosetting resins do not interact with water, therefore, even after decades, the reinforcement will not be subject to oxidation, structure failure.
To all power plants and especially nuclear power plants, high demands are made in terms of seismic resistance. Concrete structures, stone or brickwork without additional reinforcement will not withstand the loads that occur in earthquakes with a high score on the Richter scale. According to the tests, the composite fiberglass rebar retains its original properties during earthquakes of 7-9 points.
Careful research was conducted in the USA, Canada, Japan, and Europe. On the territory of Russia since 2011, specialists of the Association «Non-metallic composite rebar» are studying this issue. As a result of the impact on the composite rebar in the concrete structure with the help of special vibrators and vibro platforms it was found that the products are not subject to deformation. In severe earthquakes, cracks and deflections may appear on the surface of concrete products, but the reinforcement will remain intact.
Currently, the research continues, but the data from each experiment confirms the superiority of composite fiberglass reinforcement over the metal.