Active control test application method for improving water-stable gravel performance based on iron tailing powder

The invention discloses an active control test application method for improving the performance of water-stable macadam based on iron tailing powder, which comprises the following steps: preparing a stone powder control group mixture test piece by combining different cement mixing amounts based on stone powder, and preparing an iron tailing powder mixture test piece by replacing the stone powder with equal volume and equal particle size based on the iron tailing powder as a filler; comparing the mechanical properties of the iron tailing powder mixture test piece and the stone powder control group mixture test piece by taking the stone powder control group mixture test pieces with different cement mixing amounts as a reference; the method comprises the following steps: adding phosphogypsum subjected to dehydration and PH neutralization treatment in different proportions into an iron tailing powder mixture, and testing water stability and delayed rolling feasibility based on an iron tailing powder mixture test