The use of fibers began 3,500 years ago; it was first used as straw to reinforce sun-baked bricks in Mesopotamia and was used to meet basic needs for shelter, food and clothing. In the 1950s, composite materials such as steel, glass and synthetic fibers were used to improve the properties of concrete. Fiber comes from the Latin word fibra, which is a natural or synthetic substance much longer in length than in width. Fibers are often used in the manufacture of other materials. The strongest engineering materials often incorporate fibers, the most common being carbon fiber and ultra-high molecular weight polyethylene. Fiber-reinforced concrete (FRC) is concrete containing a fibrous material that increases its structural integrity. It contains short, discrete fibers uniformly distributed and randomly oriented. Fibers include steel fibers, glass fibers, synthetic fibers and natural fibers, each bringing its unique properties to concrete. The character of fiber-reinforced concrete changes depending on the concretes, fibrous materials, geometries, distribution, orientation and densities. Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”? Get the original essay Additionally, fibers are used in concrete to control cracking due to plastic shrinkage and drying shrinkage. In addition, they reduce the permeability of concrete and increase the ductility of concrete elements. Certain types of fibers produce greater resistance to impact, abrasion and bursting in concrete. Research into new fiber-reinforced concretes continues to this day. (Retrieved from: Wikipedia) Polymer fibers are a subset of artificial fibers or synthetic fibers, which are based on chemicals rather than natural materials through a purely physical process. However, polymer fiber can serve as a superplasticizing admixture, which can result in lower water absorption rate of concrete, high-end water reducer, higher strength and excellent elasticity. Therefore, an experimental investigation was carried out to determine the optimal dosage of adjuvants and to study the effect of overdose of the mentioned adjuvants. This elastic property of reinforced polymer fiber in cement-concrete mixture can produce better seismic resistance of the building or structure because it flexes for a certain time when the load is applied and then returns to its original position when the load is deleted. The concrete mix containing polymer fibers gave higher strength results than the standard mix. (Extracted from: Scribd)Natural fibers are abundantly available in nature and are generated or produced by plants, wood, animals, minerals and biological through different processes. The first evidence that humans used fiber was the discovery of dyed wool and linen fibers found in a prehistoric cave in the Republic of Georgia and dating to 36,000 years before the present. The use of natural fibers changes the behavior of the fiber matrix composite after cracking, improving its toughness and exhibiting high impact resistance in addition to having moderate tensile and flexural properties. Composites based on natural fibers have advantages such as lower density, better thermal insulation and reduced skin irritation. Additionally, unlike glass fibers, natural fibers can be broken down by bacteria once they are no longer in use. Keep.