Research On The Influence Of Deicer To Performance Of Airport Asphalt Pavement

The application of the deicing agents can be used as the most simple andeffective measures to remove ice and snow, this method provides reliable guaranteefor safety and high effect run of air traffic, which are widely recognized by domesticand foreign researchers.But,a large number of spraying while neglecting theinfluence of the airport runway.The study confirmed that there is significantcorrelations between pavement deicing and asphalt pavement various diseases. So itis necessary to study the performance influence of deicing agent on the asphaltpavement.First, this article discusses component of a mixture of raw materials, theadvantages, disadvantages and mechanism of different methods were analyzed,which the infuluce of deicing agent on asphalt and aggregate, and it also put forwardthe high temperature for asphalt thin layer of test conditions for asphalt performance,and to study rheological properties of asphalt uses DSR/BBR. After treated bydeicing agent, the high temperature property of SBS modified asphalt are improved,and Low temperature crack resistance property and fatigue performance seriousdegradation, and analysis shows that influence degree is related to the de-icing agenttype, concentration, test temperature, strain and frequency. Freeze-thaw cycle tesingis used for the stability of the aggregate; the results show that significant impact ofdeicing agent on the aggregate surface aging, peeling off, and with the cycle timesincrease linearly rising trend.Comparing rutting、a single axle penetration and IDT, which prove IDT test canbetter evaluate deicing agent on high temperature stability of asphalt mixtureperformance, reduce the anti-rutting performance, and gradually increased alongwith the cycle times, and has certain critical concentration, and low temperatureperformance deterioration with the increasing times of freezing-thawing circle,resistance of concrete is decreasing. In addition, deicing agent sharply reduced waterdamage resistance, the influence of water stability leading factor is the change ofvoidage. At the same time, the results show that anti-stripping agents can reduce theharm of deicing agent, and puts forward the suggestion for improving the mixed withcement.Finally, to sum up the fruitful results, it is discussion of asphalt mixture performance change based on the deicing agent before and after, the asphaltperformance influence is mainly reflected crack resistance at low temperature;Pavement void fraction promoted the residual solution fully contact with asphaltcement under the action of high-low temperature cycle, which increase the frequencyof water damage occurred.Therefore, using additive to improve、increase the densityof the asphalt pavement、control the amount of deicing agents and advanced icingequipment to reduce the asphalt pavement disease occurs frequency, which hasimportant significance.