Study of the behaviour of reinforced concrete with fibres

Concrete, the material most used in our building engineering work, is a compendium of virtues but with great flaws [1-4]; it is heavy, it has a very low relation between its resistance to traction and compression; its weight-resistance ratio is excessively high; Its volume stability leaves much to be desired, and its instability is the source of important pathological problems [5-7]. Its ability to absorb energy before it breaks is low, its durability is very sensitive to its design and execution, etc. However, when thinking about these drawbacks, the concrete has so many advantages and so many arguments in its favor that it can be considered without a doubt, the king of building materials [8-9]. The addition of fibers to the cement matrix, giving rise to fiber reinforced concretes, aims to improve the mechanical characteristics of the concrete. In this article, we compare several scientific articles, all of which contain a common theme: the study of the flexural behavior of cement, reinforced with different types of fibers, in different conditions. In particular we have 4 articles that talk about bending reinforced concrete with different fibers and environmental conditions [10]. As a result of this comparison it is observed that the fiber that improves more flex is the carbon, for the reinforcement to compression it is better to use the alone fiber of polipropileno that polipropileno and steel together, and the steel fibers work well both to compression that bending if you use alone and in limited quantity.