Research On Road Properties Of Porous Drainage Asphalt Pavement

Porous drainage pavement has sliding resistance, noise reduction and ability of easingthe urban heat island effect, it’s a kind of environmental structure of the asphalt pavement.However, the pavements also have limitations. First, due to the large gap of the porouspavement void ratio, the asphalt is easier to aging; In addition, this kind of pavement iscooling fast in its construction process, which makes it demand higher requirements upon itsconstruction process and construction temperature; In addition, this kind of pavement of thepermeable performance is susceptible to the influence of vehicle load and clogging. Theselimitations are serious influence the performance and durability of permeable pavement.In this paper, by introducing temperature and asphalt viscosity parameters, the existingforecast equation of air voids of asphalt mixture is revised, and get the forecast equation ofpermeable pavement via key mesh to pass rate, molding temperature and viscosity of asphalt;Determing horizontal permeability and vertical permeability coefficient of Marshallspecimens with different void fraction, and analyzes the relations between void ratio and itscoefficient of permeability.Analysing the main factors which influences the pavement permeability performance,and the characteristics of pores and clogging within porous permeable pavement, thepermeability attenuation characteristics of OGFC plate specimen under space jam is studied;Through the height and the change of void fraction of specimen under different compactiontimes,the influence of load on road surface water seepage performance attenuation is studied.By measuring the mixture specimen freeze-thaw splitting strength ratio and residualstability than that of different increase method has carried on the comparison and analysis ofasphalt transfer ability; Through the mixture performance, construction temperature, andcombining with the economic factors, the macropore TPS modifier in asphalt mixture optimaldosage are studied.Finally, based on the best experimental temperature, design based on the nominalmaximum particle size, porosity and viscosity of asphalt after controlling factors such as theuse of rotary compacting instrument molding specimens, compaction characteristic parametercalculation, and analyzing large pore permeable permeable pavement compaction characteristics and its influencing factors.