Technical indicators of emulsified asphalt.

In order to solve the problem that the skid resistance of concrete pavement in tunnel deteriorates rapidly, which is easy to cause traffic accidents, the anti-skid rapid elevation technology of surface treatment is proposed. Wear tests were used to investigate the effects of concrete surface roughness, properties of modified emulsified asphalt binder and anti-skid fine aggregate type on long-term skid resistance of treated surfaces. The results show that the four coarsening methods of fine milling, milling, grooving and brooming can improve the skid resistance of concrete, and the skid resistance durability of fine milling and milling is better. The adhesive property of modified emulsified asphalt is the best when the content of water-based epoxy resin is 20%. In different aggregates, the anti-skid effect is better when silicon carbide is used as anti-skid aggregate and the particle size is 0.6mm:0.3mm = 2:3. The method of fine milling of concrete surface + spraying epoxy emulsified asphalt + spreading silicon carbide can effectively improve the anti-skid performance of the original concrete pavement, and the feasibility of the scheme is verified by the test road. The research results have a good reference value for improving the skid resistance of tunnel concrete pavement.

针对隧道混凝土路面抗滑性能快速劣化、易引发交通安全事故的问题，本研究提出了一种表面处治型防滑快速提升技术。采用磨损试验考察了混凝土表面粗糙度、改性乳化沥青胶结料性能以及防滑细集料类型对处治后路面长期抗滑性能的影响规律。研究结果表明：精细铣刨、普通铣刨、刻槽、刷毛处理四种糙化方式均可提升混凝土路面抗滑性能，其中精细铣刨与普通铣刨的抗滑耐久性能更优；当水性环氧树脂掺量为20%时，改性乳化沥青的黏附性能最佳；在不同集料中，以碳化硅作为防滑集料且粒径配比为0.6mm:0.3mm=2:3时，防滑效果最优。采用“混凝土表面精细铣刨+喷洒环氧乳化沥青+撒布碳化硅”的处治方案，可有效提升原有混凝土路面的抗滑性能，且通过试验路验证了该方案的可行性。本研究成果对改善隧道混凝土路面抗滑性能具有良好的参考价值。