| In winter,the climate in southwest China is low and rainy.It is very easy to produce "dark ice" on the road surface in special areas such as highways,Bridges and tunnels,which reduces the anti-skid performance of the road surface and leads to traffic accidents.Traditional passive ice removal techniques have limitations and lag in dealing with the "dark ice" problem.Paper based on Henan province transportation project to carry out the experimental study of science and technology hall,choose a kind of core-shell structure of slow-release anti coagulation ice material and applied to the ultra-thin wearing layer,and active effective combination of preventive maintenance in addition to the snow and ice technology,solve the problem of road freeze table to reduce the traffic accident happened to promote peace traffic construction and the following innovative results:In order to meet the requirements of long-term effect of snow melting and ice suppression for salt storage pavement,based on the principle of freezing point reduction,a core-shell structure of sustained-release anticoagulant ice material(SCD)was selected to conduct material characterization and action mechanism analysis from the microscopic perspective,and the performance evaluation of SCD was carried out according to the functional requirements of sustained-release anticoagulant ice material.Based on the functions and requirements of the sustained-release anticoagulant ice ultra-thin wear layer,the material composition and mix ratio design of the sustained-release anticoagulant ice ultra-thin wear layer were carried out.The single factor method was used to study the influence of the content of SCD on the road performance of the sustained-release anticoagulant ice SMA-5 ultra-thin wear layer.Based on the theory of response surface methodology(RSM),the Optimal custom model was established with SCD content and temperature as the influencing factors,and ice melting area ratio,ice melting amount,chloride ion concentration and the bonding strength between ice and road surface as the response indexes.Based on the response surface methodology(RSM),the material composition ratio of the slow-release anticoagulant ultra-thin wear layer was optimized,and the optimal SCD content was determined to be 75%.In order to meet the requirements of the interlayer adhesion of the slow release anticoagulant ice ultra-thin wear,the properties of the adhesive layer materials were evaluated.The adhesive force and high temperature rheology were studied,and waterborne epoxy resin modified emulsified asphalt was selected as the adhesive layer material.The influence of temperature,interface roughness and the amount of adhesive layer material on the interlayer bonding property of the ultra-thin wear of slow-release anticoagulant ice was investigated by drawing test and oblique shear test,and the optimal amount of adhesive layer material was determined to be 1.0kg/㎡.Based on chemical titration method,snow melting method,pendulum value method,digital processing method and bonding force method,the ice melting performance of the slow release anticoagulant ultra-thin wear layer was evaluated.The long-term ice inhibition effect model of the sustained-release anti-condensing ice ultra-thin wear layer was built to study the release rule of chloride ions.Combined with the comprehensive analysis of hydrological and meteorological data,the long-term ice inhibition effect of the sustained-release anti-condensing ice ultra-thin wear layer was estimated to be 2.31 years.Based on slow-release anticoagulation ice anti-sliding performance of ultrathin wear layer and the wear-resisting performance,by measuring different acceleration loading times slow-release anticoagulation after ice ultrathin structure depth on the surface abrasion and friction coefficient change,establish a slow-release anticoagulation ice ultra-thin wearing course wear-resisting resistance decay rule model,validation of slow-release anticoagulation ice ultra-thin wearing layer within the prescribed period has a good wear resistance performance. |
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