What is concrete?
"A mixture of Portland cement or any other cementitious material, fine aggregate, coarse aggregate and water, with or without additives."
Classification of concrete types
Reinforced concrete and unreinforced concrete
By placing tensile members in concrete, they increase its tensile strength. This technique produces concrete products in two main categories: reinforced concrete parts and non-reinforced concrete parts.
Concrete made in place and precast concrete
The increasing need for concrete makes factories pour concrete parts in a short period of time, hard and ready to use. According to this development, concrete parts can be divided into two general categories of cast-in-place concrete products and prefabricated concrete products.
Well, after avoiding the definition of concrete and types of concrete, now let's go to the main topic of reinforced concrete and learn about this type of concrete and its types.
What is reinforced concrete and how is it different from ordinary concrete?
Reinforced concrete is a composite material in which the relatively low tensile strength and ductility of concrete is compensated by including materials such as rebar or reinforcement that have higher tensile strength or ductility.
In other words, reinforced concrete is concrete in which additives such as steel are embedded in such a way that the concrete and the added material together resist destructive forces. In concrete reinforced with steel, the steel absorbs tensile, shear and sometimes compressive stresses in the concrete structure.
History of reinforced concrete
The invention of reinforced concrete dates back to the 19th century. The use of reinforced concrete technology at that time revolutionized the construction industry and reinforced concrete became one of the most common construction materials in the world. But who used this substance for the first time?
In 1853, Francois Quine used iron reinforced concrete as a technique for building structures. Quine built the first reinforced concrete structure (reinforced concrete), a four-story house at 72 rue Charles Michel in the suburbs of Paris. Quine's description of reinforced concrete shows that he did not do this to increase the strength of the concrete, but to protect the monolithic walls from overturning, however the use of reinforced concrete was a turning point in the construction industry at the time. So far, this material is considered one of the most widely used materials used in building construction.
Usually, reinforced concrete is also called "reinforced concrete". The term reinforced concrete refers to the use of reinforcement in these reinforced concretes.
The reinforcements used in reinforced concrete are usually steel bars, mesh or bent reinforcements, which are usually passively embedded in the concrete before the concrete sets.
In addition to reinforcement, today reinforced concrete containing other reinforcing materials such as steel fibers, glass fibers, polymers or other composite materials are also made.
Due to the use of different materials in the production of reinforced concrete, the variety of this product has also increased and currently there are all kinds of reinforced concrete in the market.