Research on Road Performance and Engineering Application of High-viscosity and High-elasticity Modified Asphalt Mixture
In view of the technical problems such as the insufficient durability of the open-graded ultra-thin asphalt mixture and insufficient anti-skid performance of the dense-graded asphalt,the composition and road performance of the high-viscosity and high-elasticity CDP-10 asphalt mixture were studied by semi open-graded CDP-10 as-phalt mixture;The modification mechanism was explored by fluorescence microscopy and Fourier transform infrared spectroscopy;The optimal oil-stone ratio of the CDP-10 asphalt mixture was determined by Marshall test;The high-temperature stability of the mixture was evaluated by the rutting test;The water stability of the mixture was eval-uated by the results of the immersion Marshall stability test and freeze-thaw splitting test;The water permeability of the mixture was evaluated by the water permeability coefficient test results.The construction technology of CDP-10 asphalt mixture engineering was determined,and the quality inspection was carried out after the paving.The results show that the micro-network structure of high-viscosity and high-elasticity modified asphalt is dense and uniform;The peak areas of the finished asphalt and the upper and lower parts and segregation at 966 cm-1 and 1 377 cm-1 were quantitatively analyzed by OMNIC software.It was found that there was no significant change,and the thermal stor-age stability of the modified asphalt was better;The gradation used in the CDP-10 asphalt mixture is between open gradation and dense gradation,and the optimal oil-stone ratio is 5.1％which has good high-temperature stability,water stability and water permeability;In the application of engineering,the construction temperature control range of CDP-10 high-viscosity and high-elasticity asphalt mixture is proposed.The quality of the test section is good af-ter the construction with excellent drainage performance and anti-skid performance.CDP-10 high-viscosity and high-elasticity asphalt mixture has wide application prospects.
high-viscosity and high-elasticity modified asphaltultra-thin overlaymechanistic studyroad per-formance of the mixture
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