Abstract:Based on the situation of the Jiuma Expressway, three common curing methods of PE film sealing maintenance, geotextile covered drip irrigation water-saving moisturizing maintenance and degradable moisturizing film maintenance, and supplemented by indoor and outdoor curing as environmental conditions. The key mechanical performance indicators of water stable materials are unrestricted compressive strength, splitting strength, and rebound modulus, which are tested, compared and studied according to requirements. The results show that in the core technical indicators, namely the 7-day mechanical performance test, PE film and degradable moisturizing film all show the excellent effects. The splitting strength is almost the same. Relatively speaking, the effect of geotextile method is poor. The degradable moisture retention film shows more outstanding effect during the long-term growth of key mechanical properties. The result explains that the degradable moisturizing curing film has a positive significance and improves the splitting strength of cement stabilized crushed stone to some extent. At the same time, this type of plastic film also maintains its degradable characteristics and has good environmental protection characteristics. Therefore, under the qualified conditions, it is recommended to use the degradable water-saving moisturizing curing film for the maintenance in the areas with fragile or little water environment.
