The current traffic industry standard JTG/T F20-20 15 "Technical Rules for Construction of Highway Pavement Base" stipulates that it shall not be less than 7 days, and it shall be maintained until the lower construction begins.

The longer the time, the higher the cement strength, but the growth rate decreased obviously after 7 days. Because the cement dosage of cement stabilized materials is very small, the strength has not been greatly improved for too long, and the construction unit does not allow it.