Technique Study On Rehabilitating Damaged Cement Concrete Pavement

Highway is the lifeline of national economy. Due to its superiority and flexibility, it makes contributes so that other transportation manners cannot substitute. Highway construction is one of the basic industries in our country. Its rapid development has particularly important significance on promoting the development of national economy and pulling the development of other relative industries.By the end of 2000, the total mileage of expressway in our country has been up to 16,000 kilometers. And the mileage of high-class pavement is more than 100,000 kilometers. Among these, the cement concrete pavement has 80,000 kilometers. The cement concrete pavement that was constructed early has continually come into the damage period. The phenomenon also happens in the newly constructed pavement. When the cement concrete pavement is opened to the traffic up to 3~5 years, especially when the wear resistance of the coarse aggregate is not good and the strength of the concrete pavement is not adequate, the wear in the original road surface will be more distinct in these cases.The phenomena of stripping, pit slot, surface pit, incompact and polish, filler damage and etc. usually happen in the cement concrete pavement. It will influence the traffic quality once the diseases appear in the cement concrete pavement. Even it will bring tremendous economic loss to society. Consequently, it is necessary to repair the cement concrete pavement in time.Aiming at all kinds of diseases in the cement concrete pavement, the repair techniques have been done early in home and abroad. For example, the rehabilitation agents consist of the epoxy resin and etc. materials are used to rehabilitate the cement concrete pavement in France and Germany. The rehabilitation agents that consist of epoxy resin emulsion and silicate, suspended substances and etc. used to rehabilitate the cement concrete in American and Japan also gain good effect.Because all kinds of diseases in the cement concrete pavement exist from south to...