Method for evaluating automobile exhaust degradation efficiency of semi-flexible pavement

The invention relates to a method for evaluating automobile exhaust degradation efficiency of a semi-flexible pavement, belongs to the technical field of functional pavements and solves the problems that an existing semi-flexible pavement automobile exhaust degradation evaluation test is long in period, high in cost, not visual, difficult to directly showing photocatalyst degradation effect in real time. The method provided by the invention comprises the following steps: firstly preparing an asphalt mixture track board test piece with the void ratio of 25-35% and cement mortar containing TiO2, filling a porous asphalt mixture track board, and eliminating excessive cement mortar on the surface; putting the test piece into a testing chamber, starting a gasoline engine, pressing down an automobile exhaust analyzer test button at the same time, and monitoring change of concentration of automobile exhaust; and when concentration values of all the ingredients of the exhaust reach preset initial concentration ranges, recording initial concentrations of all the ingredients of the exhaust, respectively turning on different light sources, recording the concentration values of all the ingredients of the exhaust, continuously observing for 2 hours, analyzing test results, and rapidly and visually evaluating automobile exhaust degradation effect of the semi-flexible pavement. A reliable evaluation method is provided for research and development of an efficient photocatalysis pavement.