It has been discovered that the efficiency of asphalt blow stills can be improved by sectionalizing the blow still with perforated plates at various heights within the blow still. The perforated plates which contain a multitude of holes act to reduce air bubble size and improve the dispersion of the air bubbles throughout the asphalt flux. This increases the total surface area per unit volume of the air bubbles and promotes a faster processing time. The perforated plates also increase the contact time between the air bubbles and the asphalt flux which further results in improved efficiency and reduced blow times. This is beneficial because faster processing times can be achieved resulting in more efficient use of equipment, higher levels of productivity, lower energy requirements, cost savings, reduce blow loss, and reduced thermal history to which the asphalt is exposed.