Evaluation of skid resistance of pavement maintenance energy-absorbing seal based on surface texture characteristics

The purpose is to scientifically evaluate the impact of surface texture on the skid resistance of pavement maintenance energy-absorbing seal, and provide a technical basis for enhancing its pavement performance. Based on point cloud data, the surface texture of the pavement maintenance energy-absorbing seal was reconstructed. The influence of material quantity and ratio on the skid resistance was investigated. The regression equations between surface texture parameters and skid resistance parameters were established. The surface texture decay law and durability were clarified. The results indicate that surface texture parameters can effectively reflect and predict the skid resistance of pavement maintenance energy-absorbing seal. With the increase in spraying amount of energy-absorbing material for pavement in the upper layer, the texture depth (TD) and British pendulum number (BPN) decrease by 37.5 %-42.3 % and 36.5 %-44.8 % respectively. Multivariate regression equations for TD and BPN are respectively expressed as: alpha TD = 0.500 + 0.256 Svk + 1.179 Sdq-0.135 Spc, alpha BPN = 56.172 + 423.424 Vvv-18.010 Spc. Combined with skid resistance and surface texture durability, the scheme involving the energy-absorbing material for pavement being sprayed at an amount of 1.0 kg/m2 for the upper layer and 2.0 kg/m2 for the lower layer, with a crushed stone coverage rate of 40 %, and a ratio of 25:75 being utilized between 2.36-4.75 mm and 1.18-2.36 mm crushed stones, was recommended.