Applied Research Of High Performance Cement Concrete Pavement Repair

High Performance Concrete is a kind of new concrete that was originated in recent years. In this paper, PFAC was first manufactured successfully and its main content is a kind of waste residue from industry, which is called pulverized fuel ash. Through the testing of a great deal of experiments, PFAC can be used with the quantity of more than 30 percent into confecting High Performance Rapid Repair Concrete series, and it can meet the requirements of resuming the traffic on Portland Cement Pavement as soon as possible, Meanwhile the sustainable of the repaired part was ensured. In the end, the testing section was paved and it indicates that this program gained success from the practice of engineering. The main achievement got in this paper can be list as follows:1. By analyzing each component of the PFAC through many experiments, We selected each component and its content properly. The concrete that was confected by PFAC reaches our predicted objective and has a series of high performance: easy mix, high early strength, high compressive strength, high bending strength etc. The old and the new concrete have a strong cohesion and the same stiffness and deformation conformably.2. In this paper, a simple and easily applied design method of concrete composing ratio was developed on the basis of large numbers of experiments and the rules of general concrete design.3. A large number of mechanical experiments of high performance concrete were carried out , especially the experiments about the cohesion of the old and the new concrete. It' s compressive strength , bending strength and the ratio between compressive and bending all have some increase. The testing reports also indicate that: it is feasible to replace the equal amount of concrete by using 30-35 percent of PFAC.4. On the basis of large amount of experiments and their in-site applying, an experience about the techniques of construction and the quality ensuring system can be made, also it has an important reference value to direct the construction and design work..