Strength properties of hybrid fiber-reinforced high strength concrete.

      Аннотация: Concrete is the most widely used construction material since it has the lowest ratio between strength to cost as compared to other available materials. Over the years many researchers have been able to overcome the inherent weaknesses of concrete thereby making it significantly more suitable for a wide variety of applications. The introduction of reinforcement by short discrete fibers (steel, nylon and polypropylene) that are randomly distributed can be practiced among other that remedy weaknesses of concrete such as brittleness, low crack growth resistance, low durability, etc. Fiber-reinforced concrete is a composite obtained by adding a single type or a blend of fibers to the concrete mix. The use of one type of fiber alone helps to eliminate or reduce the effects of only a few specific undesirable properties. Based on previous studies, the addition of two types of fibers in a suitable combination would help to improve more properties of concrete among the fibers. This aspect of combining the fibers, i.e. hybridizing the fibers in a rational manner to derive maximum benefits, is investigated in project for a very high strength concrete was studied.

Ключевые слова: compressive strength, High strength concrete, mechanical properties, Hybrid fiber, Impact test