Study On The Adaptability Of Permeable Ultra-thin Overlay Layer On Anti-skid Performance

Expressway traffic accident incentives are many aspects of the tunnel import and export,long vertical slope,continuous corners and toll stations such as import and export of special sections of the road surface slip resistance is one of the main factors.In order to improve the pavement anti-skid performance of special sections,it is necessary to carry out preventive maintenance on the existing road system laying anti-skid sheet under the condition of good road condition.In this paper,the asphalt pavement anti-skid thin layer as the object of study,in the traffic load under repeated anti-skid performance,durability,hoping to improve the anti-skid performance of the pavement has been applied and reference.This paper first summarizes the anti-skid mechanism and influencing factors of asphalt pavement.Through the indoor comparison test and the anti-skid index,the anti-skid decay law of asphalt mixture is verified,and in order to further understand the change of anti-skid performance at different times,number formula to fit.The experimental results show that the friction coefficient and tectonic depth of the two kinds of asphalt mixture gradually decay with the increase of the accelerated polishing time,the early decay is faster and the later tends to be gentle;and the regression correlation coefficient is large,decay studies are compared to confirm that the decay of asphalt pavement decay is consistent with the existing research.Secondly,it is necessary to test whether the anti-skid sheet can improve the anti-sliding performance of the pavement and the adaptability of the anti-skid property of the anti-skid sheet.The indoor comparative analysis is carried out with the same loading condition as the asphalt mixture.The results show that the three anti-slip layers can improve the anti-sliding performance well,and it is similar to the anti-slip decay law of asphalt pavement and can resist the polish effect well.Are able to resist the polished effect.And the logarithmic formula is further fitted to obtain the correlation coefficient,and the fitting curve of the relationship between the anti-slip decay and the time is excellent.The evaluation of the adhesion of the aggregate and the binder and the wear of the aggregate by the difference in the mass loss of the layer,and the usefulness of the anti-skid sheet with the reference to the mass loss of the aggregate.It was found that the epoxy resin had excellent cohesiveness to the three kinds of aggregates,and it was deduced that under the heavy traffic condition,the anti-skid layers of the threekinds of aggregates were used for more than 10 years,the slippery layer provides long-term anti-slip for the pavement in the event that the aggregate is peeled off.On this basis,an indoor comparative study of the bonding properties was carried out to evaluate the adhesion of the anti-skid sheet to the original road surface.The results show that the location of the asphalt concrete is at the interface between the asphalt concrete and the anti-skid sheet,and the asphalt mixture is attached to the surface of the anti-skid sheet.It shows that the anti-skid sheet has better adhesion with the asphalt pavement knot performance.Finally,according to the indoor experiment,two kinds of anti-slippery slabs are selected for solid engineering application,and the anti-skid indicators are observed and tested.It shows that the anti-skid layer has excellent anti-skid performance and can provide useful reference for pavement.