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Research on Structure and Material of Asphalt Pavement Overlay on City Special Sections

Author: DuanJingJing
Tutor: ZhangRongHui
School: Guangdong University of Technology
Course: Structural Engineering
Keywords: Road intersections Pavement Distress Finite Element Analysis Anti - rutting agent Grading curve
CLC: U418.6
Type: Master's thesis
Year: 2011
Downloads: 32
Quote: 1
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Abstract


Main reason for S120 stone row to bridgehead paragraph four intersections old cement concrete pavement overlay as the research object, based on the investigation and evaluation of the sections of the road damaged condition and pavement structure carrying capacity, the analysis of a variety of road breakage treatment measures for different damaged condition. In this paper, the ABAQUS finite element program focus on analysis of the structure layer parameters and different axle load on the plus resurfacing layer structure stress. The results show that: the asphalt overlay thickness of 18cm, U.S. AASHTO, effective thickness of experience in the thickness of the overlay design method calculated the thickness of the overlay is very close to the maximum shear stress and the different thickness of asphalt overlay location are overlay in the surface layer, thereby increasing the modulus of the asphalt in the surface layer of the ply material maximum shear stress values ??can significantly reduce the reach of the effect of the anti-rutting; truck overloading the pavement structure by The force of the impact is far-reaching, and therefore must overload stress analysis. Provided useful experience and draw lessons for future similar to the old cement concrete pavement reconstruction. Dongguan high summer temperatures and long duration rainfall all year round, at the same time serious road intersection area of ??channel traffic, the vehicle is started, the brakes frequently, seriously affecting road speed slow will make the intersection area of ??asphalt pavement with varying degrees of Rut Using performance. In this paper, based on systematic analysis of the asphalt pavement rutting formation mechanism, influencing factors, from the two aggregate gradation and anti-rutting agent to improve the high-temperature asphalt mixture resistance to rutting. First, the use of grading theory on the basis of analysis of the advantages and disadvantages of various grading type design of the five kinds of norms within the recommended range grading curve, then Marshall test five kinds grading curve asphalt mixture rut test to choose the optimal resistance to high temperature performance grading curve. Secondly, in order to fully understand the impact of the anti-rutting agent for asphalt mixture selection PR Road Rover 8000 and domestic the RK300 three anti-rutting agent road performance test, compared with ordinary asphalt. The test results show that the three anti-rutting agent to improve the high temperature stability of asphalt mixture water stability significant effect; combination of economic analysis, RK300 anti-rutting agent optimal cost. Suit the hot weather in Dongguan City, 70 ° C rutting test results showed that the anti-rutting agent for improving the resistance to high-temperature performance of asphalt mixture is very effective.

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CLC: > Transportation > Road transport > Road works > Road maintenance and repairs > Road maintenance and repair
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