The Research Of Layer Combination And Key Technology Of Construction Of Continuously Reinforeed Conerete Composite Pavement

The CRC + AC composite pavement structure of continuously reinforced concrete is a new type of composite pavement structure,which combines the high-strength of continuously reinforced concrete slab with the riding comfort of bituminous concrete surface. The CRC as a rigid foundation plays the role of the main load-bearing, and the surface AC layer is mainly from the role of function level. The composite pavement structure of continuously reinforced concrete is of the advantage with the overall high strength,long service life,and low maintenance costs,and it's one of the development direction of the heavy-load traffic long-life pavement structure. The take coat between the CRC and AC layer plays a vital role for the whole composite pavement structure,so the analysis of shear stress,for the continuous composite reinforced concrete pavement take coat layer,and the improvement about the performance of the bonding layer are two problems for the type of compoud pavement,and we needed to pay attention to solving these problem. this paper has been designed to study at home and abroad,and studyed the continuously reinforced concrete composite pavement bonding layer based on theory,testing and on-site construction.Based on Changde-jishou CRC + AC freeway continuously reinforced concrete compound pavement test road,according to the characteristics of the bonding layer structure of the continuously reinforced concrete composite pavement,and around the interlaminar shear stress analysis,shear layer material properties,the indoor interlaminar shear strength test, the structural design of asphalt surface based on interlaminar shear stress indicators,as well as the construction of key technologies of CRC + AC interlayer bonding layer,this paper have Formed a relatively systematic research results.This paper have analysed maximum shear stressτymaxthe impact of the law in the y direction (loading direction)by using ANSYS software,when the conditions of factors on the bonding layer changed; In this research project,we have processed the different content SBS + CRM compound modified asphalt by ourselves for continuously reinforced concrete composite pavement bonding layer,and the three indicators test and Brookfield Viscosity Test rotary viscometer test,and tested the shear stress of different content Test SBS + CRM composite modified asphalt binder by using the structure of the surface layer oblique shear tester and direct shear tester designed and developed by ourselves, under the different interface conditions, the different amount of asphalt as well as the different temperature,derived the best dosage of SBS + CRM modified compound bitumen,and determined the best combination of blending ratio of SBS + CRM was the blending ratio of 10% +6%; The Design thickness of asphalt surface based on the interlaminar shear stress indicators on the CRC + AC Continuously reinforced concrete pavement compound structure consider the Shear fatigue failure as the permissible shear stress of interface bonding between layers of materials by the test results of the structure of the surface layer oblique shear tester,and then determined the thickness of AC layer by the regression formula; Through the construction of test sections of the Changde-jishou freeway,from the guarantee of high viscosity modified asphalt bonding layer composite construction quality point of view,we have discussed and analysed the material quality and construction technology, and made a number of measures and proposals,at last, Succeeded in solving some of the key technical problems in the SBS + CRM bonding layer of modified asphalt composite construction.