| The rapid development of highway construction has brought great convenience to the people.With the progress of science and technology,the safety performance to the requirement of road traffic has risen to a higher standard,and the problem of decreasing safety coefficient due to the attenuation of skid resistance of pavement surface is also getting more and more attention.Various new anti-skid coatings have been developed and popularized,especially the resin thin layer anti-slip paving material.However,there are few uniform specifications for the design indexes of new thin layer anti-slip materials.A kind of thin layer epoxy paving material was studied in this paper,and its anti-slip performance was analyzed under the condition of different wear-resistant particle selection.It provides reference for the technical design parameters and the selection index of the pavement anti-slip performance.Due to the common epoxy anti-sliding pavement materials at the present stage showed excellent interlayer bonding capacity.It could effectively bear the repeated effects of the driving load without the phenomenon of interlayer peeling.Therefore,this paper mainly analyzes the surface of thin layer epoxy paving material with wear-resistant particles.In this paper,the mechanical properties of the same particle size with different lithology were analyzed firstly by means of the test method of basic mechanical properties of aggregates.And the surface morphology of different wear particles was characterized by the aggregate image test system.The test data show that the apparent relative density of emery is relatively high in different lithological wear particles,but its two-dimensional shape index and angular index are also larger due to structural reasons,and the impact value and crushing value are also large.The two-dimensional shape of ceramic particles is closer to the circle.The related indexes of basalt and ophiolite are relatively close.Secondly,a small accelerated loading test machine was used to evaluate the indoor anti-slip performance of thin layer epoxy pavement materials with different wear particles.And the regression analysis was performed by the exponential model and the logarithm model respectively.The results show that the anti-slip properties of the thin layer epoxy pavement with the same lithologic wear particles are increased with the increase of particle size.For thin layer epoxy paving materials with different lithological wear particles of the same particle size,ceramic particles type of thin layerstructure against sliding depth attenuation rate is low,and the anti-skid resistance of basalt and ophiolite is excellent.The fitting analysis of the anti-slip performance attenuation of thin layer epoxy pavement materials by different models showed that the logarithmic model is better than the exponential model.On this basis,the correlation degree between the basic mechanical properties,apparent properties and the anti-slip properties of thin layer epoxy pavement was studied by grey correlation analysis method.It is determined that the polishing value is the key index to influence the skid resistance of thin layer epoxy pavement.Finally,a comparative study on the indoor anti-slip performance of thin layer epoxy pavement materials with three different construction techniques is conducted according to the actual situation of the existing project.Studies have shown that the double-layer coating of the thin layer of epoxy coating is superior to the single layer of the coating.The anti-skid resistance of single layer mortar coating process has a lower attenuation,but its overall anti-slip performance is poor according to the coefficient of friction coefficient of pendulum. |
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