Surface Course Material Properties Test And Conceptual Design Of White And Black Pavement In G324 Xia-men Section

The rapid development of transportation promotes the integrated development of highway infrastructure. A lot of pavement endured overloading operation under big traffic volume, heavy load, overload and diversified transportation means, the early repaired roads mostly reached or approached their design service life , the pavement diseases are serious, diverse, difficult to maintain and maintenance costs increase, which seriously restrict the driving speed and influence the driving safety and traffic capacity. Early repaired roads are mainly cement concrete pavement in our country, lots of pavements appeared structural damage and functional damage with different degree by many years operating, so urgent to be medium-capital repaire. Paving bituminous concrete surface on old cement concrete board (namely white and black pavement) become major measure of old road reconstruction project .The reconstruction project of white and black pavement is still in the phase of experience explore and experiment at home and abroad, experiment methods, design theories and practical technical problems solving are still not perfect. The choice of overlay project should combine with local circumstances, the overlay design scheme and pavement structure should suitable for the geographic environment, climate condition, traffic state of the project area. The reflection crack of white and black pavement has always been a different problem which perplex the maintenance and construction design of reconstruction project. Although asphalt pavement design standard has makes related requirements to the design of asphalt overlay, but it's not perfect, the control effect of most white and black pavement reflection cracks is still not ideal.This paper based on the traffic and climate features of G324 Xiamen segment , aiming at white and black pavement renovation project, on the basis of analyze the temperature performance and water stability of surface layer, middle (below) layer asphalt mixture of asphalt overlay , through performance tests of surface layer and middle (below) layer asphalt mixture to reveal their mechanical properties with different design mix ratio (that is ARAC-13,SMA-13,AC-20 and ATB-25), the pertinent pavement design scheme of white and black pavement has been proposed. The mechanical properties of white and black pavement which under light traffic, heavy traffic and special heavy traffic respectively have been calculation and analysis by means of Phase^2D finite element technique. The distribution and characteristics of total deflection (pavement surface) and flexural stress (layer bottom) have been check, the results meet the code requirements.Combines with the practical renovation project, this paper proposed the pavement structure design scheme of white and black pavement renovation project which suitable for Xiamen area, the corresponding treatment measures of old road , reflective crack control technology and subgrade and pavement drainage design scheme also have been suggested, the research results can referenced similar project.