Experimental Study Of Anti Slide Performance Of Asphalt Pavement Base On Macro Profile

Along with social civilization improvement, people focus more on the safety oftransportation. Improve the anti slide performance of asphalt pavements has become a keytechnology to guarantee the safe transportation, and the contact of tires and rough pavementsurface is the key of this technology.This paper studies the asphalt pavement anti slide performance by analyzing the contactof tires and different pavement surface macro profile and figure out the key factors thatinfluence the performance. Based on film pressure technology, this paper also points out therelation of the contact of tires and different pavement surface macro profile by comparativeexperiments to prove the importance of the surface profile to the anti slide performance of thepavements.To measure the macro profile of asphalt pavement surface, a high precision (10μm)laser-measuring technology based measuring instrument has been researched and developedto test the surface of mixed asphalt and its dying features from tridimensional view. Based onthis study, this paper points out anti slide performance such as peak angle of the pavementsurface profile and its decay rate and the standard to evaluate anti slide performance anddurability. Paper also proposes the peak angle effective guarantee rate is more than70%basedon anti slide performance rubbing experiment under testing condition of60℃standardtemperature and eight hours standard time.This paper studies the reduction feature of1~2cm depth of asphalt pavement surface byhigh precision (0.1mm) industrial CT technology from angle and tridimensional view. Thestudy proposes anti slide performance and durability evaluating index such as particle arearatio, volume porosity, anti slide structure sensitive area reduction rate, etc., and points outvolume porosity is more than10.6%and anti slide structure sensitive area reduction rate isless than34%based on anti slide performance rubbing experiment under testing condition of60℃standard temperature and eight hours standard time.To simulate accelerated loading function of traffic load on the asphalt pavement to theanti slide performance, an indoor rubbing experiment device has been researched andinvented. The study uses single particle of composite material of epoxy resin to verify compaction or abrasion effect of traffic load influence by the rubbing experiment andestablishes a relevant anti slide performance evaluating system to show the influence ofsurface profile to the asphalt pavement’s anti slide performance.Based on rubbing experiment, this paper studies the anti slide performance and durabilityof tense graded asphalt mixed with GAC-13and tense-suspension grade asphalt mixed withAC-13by traditional conventional test methods such as texture depth and friction coefficient,and self-invented shape measuring instrument. Furthermore, paper studies the anti slideperformance and durability of four grades of tense grade asphalt mixed with GAC-13byindustrial CT technology to seek mix anti slide asphalt with better starting anti slideperformance and durability.To prove the experimental research result, this study has been applied on runningprojects. Tracking observation and comparative analysis based on measuring methods and antislide performance evaluation method this study developes shows that anti slide structuresensitive area(depth),volumetric porosity, coefficient of friction, structural depth, etc. thoseconventional indicators can highly meet the research result. But study of anti slideperformance based on rubbing experiment and profile measuring instrument has largedifference comparing to running projects testing result. This may be caused by the obviousdifference of lab testing plates and running projects plates forming process. Therefore, toimprove plates forming process of the running projects to increase anti slide performance ofasphalt pavements is another further research area.Study of this paper can remarkably change the fall-behind situation that the design ofasphalt pavement largely depends on experience and realize scientific design of asphaltpavement anti slide performance. Therefore, to reduce the resource waste and to improve thesafety of pavements.