The Mechanical Properties Of Steel Fiber Reinforced Concrete And Pavement Engineering Applications

The Steel fiber-reinforced concrete is a kind of new structural material and is a kind of new compound material that is formed by adding the proper amount of steel fibers into ordinary concrete recently. It can be poured and can be ejected to form some shapes. It has better physical mechanics properties than ordinary concrete except crushing resistance . It can make ordinary concrete that is a kind of brittle material be changed to a kind of compound material that has better plasticity. Its main working mechanism is to improve the brittleness of ordinary concrete by using short fibers that are scattered equably. Because short fibers have higher dragging resistance and ordinary concrete has higher crushing strength in the process of stressing, every technical property of fiber-reinforced concrete is improved greatly. Accordingly fiber-reinforced concrete has better stressing properties such as crack resistance , bending resistance , anti-fatigue, anti-friction and high toughness. So it has brilliant future in highway surface, road surface of aerodrome and architectural construction.At first the application and theory of fiber- reinforced concrete at home and at abroad is analyzed in this paper. Then based on the basic theories of fiber-reinforce concrete. Original materials are selected carefully and mix proportion of fiber-reinforced concrete which is suitable for road construction is designed and filtered carefully. Mechanical properties and pavement application of The Steel fiber-reinforced concrete is studied in details by combining engineering practice. The main research outputs of this paper are as follows:l.Baed on the choosing rational mix proportion, the influence of changing volume proportion of steel fiber on mechanical properties such as crushing resistance, splitting resistance, breaking resistance and bending resistance and the variation rule of mechanical properties are studied by experiment and theoretical analysis of 320 samples. According to experimental results of different layered structure of fiber-reinforced concrete, the influence of layered height on splitting strength and breaking strength is discussed. So it offers reliable reference to design road structure by using fiber-reinforced concrete.2.The type of steel fiber and the form of it in concrete are described and analyzed and the mechanism of fiber-reinforced concrete such as reinforcement, damage and cracking resistance is discussed.3. According to the experimental results and the method to design road surface by using cement concrete, design theory , design method and design procedure fittingfor single-skin and compound fiber-reinforced concrete road are brought forward.4. This structural design is applied to real engineering. The construction technology and working results of fiber-reinforced concrete road are discussed by laying test road in order to promote the application of fiber-reinforced concrete.5. Pavement structure that is put forward in this paper turn away these disadvantages that the asphaltum road and ordinary concrete road easily come forth often. By adopting static and dynamic analysis methods, economic and technical evaluations of common concrete road, fiber-reinforced concrete and compound road by combining steel fibers with common concrete are put forward .This conclusion is drawed that compound road by combining steel fibers with common concrete are put forward is better than other roads. Material and fund can be saved and road longevity can be prolonged if this road structure is adopted.