| In the field of road transportation,polymer anti-skid thin layers are extensively employed to enhance the skid resistance of road surfaces.With the growing awareness of environmental protection in society,new demands for eco-friendly construction in the road engineering domain have emerged.Solvent-based adhesives commonly used in polymer anti-skid thin layers typically contain volatile organic compounds(VOC),such as toluene,ethylbenzene,and formaldehyde.To satisfy environmental requirements,it is necessary to adopt low-VOC-release adhesives.Addressing this issue,an environmentally friendly low-VOC adhesive-polymer-modified waterborne epoxy acrylate-is selected for studying its performance in anti-skid thin layers for road use.This approach fulfills road use requirements while enhancing environmental friendliness,offering new perspectives for the development of anti-skid thin layers.To better study the road performance of polymer-modified waterborne epoxy acrylate anti-skid layers,the curing mechanism,curing time,bonding performance,and shear resistance at high and low temperatures of the adhesive were investigated.Quartz sand fine fillers were chosen to modify the adhesive,and the optimal dosage and particle size were determined.In terms of anti-skid layer materials and construction design,the physical properties of three anti-skid aggregates,basalt,corundum,and colored ceramic particles,were tested,and the construction process and adhesive-to-aggregate ratio were experimentally screened.In the study of road performance for the anti-skid layers,an accelerated loading test machine was used to test the durability of thin layers with different aggregates and gradations.The International Friction Index(IFI)was introduced to evaluate skid resistance durability.Using logarithmic and exponential fitting models and grey relational analysis theory,the accelerated loading test data was analyzed,and a prediction model for thin layer skid resistance durability was established,as well as the relationship between aggregate physical properties and thin layer performance.Finite element software was utilized to analyze the interlayer mechanics between the anti-skid layer and the cement concrete layer under different conditions.The performance study of the adhesive revealed that the optimal dosage was0.3g/cm~2,and the optimal curing time was 36 hours.Shear tests at different temperatures demonstrated that the adhesive had good shear resistance in environments ranging from 5℃to 55℃.Viscosity,tensile,and wear tests on the adhesive modified with quartz sand indicated that the comprehensive performance was optimal when200-mesh quartz sand was added at 20%.Research on the construction methods and material composition of the anti-skid layers found that layers constructed using a mortar mixing method exhibited better skid resistance durability,and the wet wheel abrasion and skid resistance performance test results were optimal when the adhesive-to-aggregate ratio was between 0.3 and 0.6.Accelerated loading wear tests for10 hours on anti-skid layers with different aggregate types and gradations showed that basalt layers had the best skid resistance durability,and the more coarse aggregate content,the better the durability.Grey relational analysis of aggregate characteristics and thin layer skid resistance durability indicated that angularity,apparent relative density,and water absorption had a stronger correlation with durability.ABAQUS finite element analysis results showed that interlayer tensile and compressive alternating effects were more likely to occur during low-speed uniform vehicle movement,while interlayer compressive stress effects were more pronounced at high-speed uniform movement.The elastic modulus of the anti-skid layer had little impact on the interlayer longitudinal shear stress.The thickness of the thin layer,wheel load,and horizontal force coefficient were identified as the main factors affecting the interlayer longitudinal shear stress. |
