ABSTRACT
In order to develop the preventive maintenance technology for porous asphalt in China, a specialized designed maintenance material and emulsified asphalt were investigated in this paper. Experimental studies are conducted on observing properties of the two materials, including test of effect of rejuvenation on aged asphalt, adhesion with stone, permeability and skid resistance performance. Test results show that the specialized designed preventive maintenance materials have two significant properties: one is to rejuvenate the aged asphalt, and repair micro crack in asphalt film; the other is the good adhesion with stone. Implementation of the preventive maintenance technology on porous asphalt is also studied. Different spraying methods are compared, and the influences of amount of preventive maintenance material on road surface characteristics are measured and discussed. Based on the research findings, the preventive maintenance technology is applied on a porous asphalt section on an expressway of China.
