Design and construction of the old asphalt pavement semi-rigid base structure performance restoration

The author introduces the aim mixing ratio design of the performance restoration test road of the old asphalt pavement semi-rigid base structure on Guizhou province S305 line,as well as the construction technology of the fly ash-cement stabilizing broken stone cold recycling semi-rigid base and the emulsion asphalt cement stabilizing broken stone cold recycling semi-flexible base,describes the effect of the cold recycling,and some attention points and suggestions in design and construction,so as to accumulate experiences for similar project construction.