In order to improve the level of urban roads in good condition, prolong the service life and play its role in the process of national economic development, the manufacturers of non-woven fabrics lay saturated non-woven geotextile between the old asphalt pavement asphalt layer and reinforcement layer between urban roads, which can effectively prevent the reflection cracks of asphalt pavement, and slowly overcome the foaming of spring road, It has been proved that this is an economic and effective road strengthening technology.

The main diseases of asphalt pavement are potholes, inclusions, potholes, cracks, etc. Reflection cracks will lead to many cracks in the road surface, make the water (rain water, sanitary sprinkling) of the road surface infiltrate to the basic level, reduce the shear strength of the base material, which will lead to more serious diseases, shorten the service life of the road, and increase the investment fund for road maintenance. In order to prevent the cracks in the underlying layer from reflecting onto the pavement, the traditional method is to design the pavement with enough thickness to delay the occurrence of cracks, or to pour asphalt at the place where the cracks appear. There are other methods, such as adding modified asphalt to asphalt mixture to increase the deformation of pavement layer; adding short steel fiber or synthetic fiber mixture to improve the tensile strength of the road. In recent years, another new technology has been proved by research and practice at home and abroad, which is to lay the asphalt surface layer of geosynthetics (nonwovens, textile materials, geogrids, geogrids) and the interface layer between the surface layer to prevent reflection cracks to the surface layer. In order to meet the needs of national economic development, asphalt concrete pavement is laid on cement concrete pavement and old asphalt concrete pavement. Improving the function of cement pavement and asphalt concrete pavement can improve the flatness of the pavement, prevent the occurrence of reflection cracks, and play the role of waterproof layer. The geotextile is laid between the base material layer and the surface layer and permeates the asphalt to form the middle layer between the geotextile and the asphalt, so as to prevent the cracks of the surface layer from reflecting to the surface layer and play the role of the waterproof layer.