Study On Asphalt Overlay Design Of Highway

The bituminous pavement is one of our country first-class highway pavement structure main forms. Along with the heavy load transportation appearance and the formation,the bituminous pavement early time destruction phenomenon is increasingly common, Our country road surface condition gradually from newly built changed to has maintained, the asphalt added the layer achievement to improvethe old bituminous pavement one typical way, aims at one serviceable method which the constitutive property damaged proposed.This topic studies two aspects from the old road appraisal and overlay design, in view of the highway own damage characteristic, joins the wheel rut in the old road appraisal to evaluate the target,established has suited the highway the old road pavement evaluates model. Anylyzed the relevance between FWD and BB,diccussesuse the Feasibility of use in the asphalt overlay design ;In view of the highway wheel rut gravity and the universality, use the different destruction pattern to process overlay structural design question, proposes the multi-targets design thought. and Suggest increasing the shearing stress index in road surface physical design. at last, Against the universal existence reflection crack question in the overlay, has discussed the different preventing and controlling measure.In domestic construction, engineering level moves downwards ,how study overlayer design method through the improvement to reduce overlay in the age of pavement early destruction, enables the bituminous pavement the performance further to display, will play the very good model role to the next highway asphalt overlay project.