The reason why 6% stone powder cement stabilized layer is used instead of road stone powder cushion layer is because it will be more stable and lower in cost.

Cement-stabilized stone powder slag is a kind of pavement base material which can reach the specified strength by using fine sieve slag from gravel yard, adding appropriate mixture of cement and water, mixing, compacting and curing.

6% cement stabilized macadam base, that is, the quality of cement accounts for 6% of the total quality of cement stabilized macadam base. It has high early strength (the seven-day compressive strength can reach about 70% of the service strength), good water stability and good sheet properties. If 6% stone powder cement is used, the strength is high and the cost is low.