Asphalt Overlay Transform The Old Concrete Pavement And Related Finite Element Analysis

Paving asphalt pavement on the old concrete pavement is a common effective technique for pavement regeneration.It has the advantages of short construction period,little side effects for tansportion and good service after regeneration. Promote the carrying capacity and prolong the servive deadline.But durig the use of overlay,it easily emerges the reflect cracking in asphalt concrete pavement because of the original crack in cement concrete, and this brings severe negative influences on the life of pavement.This article with reality, Analysis of the asphalt surface prior to overlay the old Cement Concrete Pavement Treatment, Introduced the pavement performance evaluation indicators and evaluation methods. Cement concrete pavement for the old asphalt overlay structure of the mechanical characteristics, In this paper, a finite element model of multi-structure system, Old cement concrete pavement asphalt overlay of the mechanical properties of in-depth study. Establishment of a sandwich model of pavement structure, Analysis of vehicle loads of different sort overlay thickness of the pavement structure, Obtained the thickness of asphalt overlay should not be less than 10cm, old cement concrete pavement thickness and elastic modulus of asphalt overlay can reduce stress and seams on both sides of the bottom layers of asphalt deflection difference. Meanwhile, car loads of different layer thickness of the surface structure of three-dimensional finite element analysis, obtained when the sandwich too thin asphalt overlay loads in the vehicle will have a greater stress, Optimal thickness of between 2cm to 2.5cm.