Study Of Construction Technology For Old Cement Concrete Pavement With Thin Asphalt Coating

Spreading the asphalt concrete surface layer on the old cement concrete pavement is one of the effective methods to rebuild it. Basing on the research results from inland and overseas, pointing at the weather, traffic conditions and road buildings of XUZHOU, the paper makes deeply analysis to the theory of anti-reflective cracking, which occurs between thin asphalt overlay and old cement concrete pavement. Using ANSYS software, the paper also makes a numerical and deformation simulation to the asphalt overlay separately when load, temperature and coupling forces act on which. Based on these mechanics analysis, the structural method and laboratory tests of thin asphalt overlay in XUZHOU area are designed. Relying on G104 airdrome highway, we construct the testing road, then make the studies, discussions and summarizes of construction technology. Finally, we make an evaluation and analysis to the performance arid economics of thin asphalt overlay on the cement pavement. This study in paper will contribute to the farther research and popularization of the thin asphalt overlay in XUZHOU area. Application of research technology needs a careful investigation and deep analysis to the origin that damages to the old pavement, which provides the reliable basis for the material composition and structure design. In addition, when asphalt layer is constructed, the whole process must be scientifically supervised in guidance of experiment. Frequency of the extraction, screening and Marshall experiments should be carried basing on which the Technology Standard stipulated, then the production parameter should be adjusted according to these experiments. Thereby, the design and construction can be further regulated.