Study Of Cement Concrete Pavement With Stress Absorbing Layer

A long time, the cement concrete pavement disease affects many of their useful life. Cement concrete pavement under repeated loading the role of vehicles, when the vehicle load over the bearing capacity of the road when on the road affect the structure of the whole pavement, and even the destruction of the grass-roots level. The study found through a wide range of settings stress absorption layer structure of cement concrete pavement, cement concrete pavement to improve the use of the quality of the work to improve road conditions, to extend the service life of pavement, cement concrete pavement to reduce the cost of the entire life of great significance.Based on the current situation of cement concrete pavement, the mechanism of failure and damage analysis of concrete pavement was found in the repeated flow of traffic and vehicle loads from erosion, fatigue and wear damage caused by varying degrees of damage to the form of roads, and erosion damage cement concrete pavement is the most important one of the most serious diseases, in the form of mud pump, wrong platform and board at the end of disease from air is induced split off the main board and network element in the cement concrete pavement in this article to carry out reasonable structure research. Stress analysis of the functional characteristics of the absorption layer, the road version with the semi-rigid layer between the stress can be reduced through the cement concrete pavement layer to absorb the stress transmitted to the vehicle by the impact of load vibration to absorb the functions of stress; can Table effective way to prevent infiltration caused erosion damage to the grass-roots level; can be isolated concrete panels bonded with the grass-roots, prevention of pavement temperature in the larger role of warpage and stress caused by the end plate and the top surface of the grass-roots phenomenon from outer space; can effectively prevent the grass-roots level have a shrinkage temperature shrinkage cracks and cracks in the pavement after the expansion, the formation of reflection cracks; set up in the top surface of the grass-roots level stress absorbing layer, but also can reduce the friction between layers to prevent hardening of the pavement after the stress concentration and have a broken board. The use of asphalt mixture gradation of design theory and methods, designed to absorb the stress grading layer mixture; stress-absorbing layer according to the functional properties, to carry out asphalt mixture YF-based research, the void fraction less than 2 percent limit, oilstone than desirable controlled between 6.5 ~ 7.5%, which YF-5-type of asphalt mixture to adapt to 2cm thick layer of stress, YF-10-type of asphalt mixture to adapt to a thickness of 3 cm layer of stress. Stress-absorbing layer to the composition of the material and its technical requirements. A stress test the performance of the absorption layer, through the freeze-thaw fracturing tests, room temperature tensile test and isokinetic test that water stress absorbing layer has a good road performance. Stress-absorbing layer made of the construction techniques, through the application layer to absorb the effect of stress analysis, setting of cement concrete pavement stress absorbing layer can be achieved to extend the fatigue life of concrete pavement purposes.