According to the current traffic industry standard JTJ 034-2000 "Technical Specification for Construction of Highway Pavement Base", it is required to maintain health for 7 days.

/kloc-the new standard jtg/tf20-20 1 5 "technical rules for the construction of highway pavement base", which was implemented in August, should be no less than 7 days, and it should be extended to 2 days before the superstructure construction.