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为评价水性环氧树脂改性乳化沥青微表处的性能,采用先乳化后改性的方法制备水性环氧树脂改性乳化沥青,利用三因素三水平正交试验确定最佳油水比、乳化剂掺量和水性环氧树脂掺量,并以其作为微表处胶结料。通过1h湿轮磨耗试验(WTAT)和负荷轮黏附砂试验(LWT)测定5组不同油石比微表处的磨耗值和黏附砂量,根据磨耗值或黏附砂量与油石比曲线交点确定微表处最佳油石比。采用6dWTAT、摆值试验和渗水试验分别评价微表处的抗水损坏、抗滑性能和防水性能,通过轮辙变形试验判定水性环氧树脂改性乳化沥青微表处可用于车辙填补,并利用车辙填补试验和罩面车辙试验评价微表处的抗车辙性能。研究结果表明:水性环氧树脂改性乳化沥青最佳油水比为65∶35,乳化剂掺量(质量分数,下同)为1.4%,水性环氧树脂掺量为4%,微表处最佳油石比在6.7%附近;微表处抗水损坏性能满足磨耗值不大于800g/m2的技术要求,抗滑性能满足摆值不小于70BPN的技术要求,且其高出技术要求,能为行车提供较好的摩擦力;经碾压养生后的微表处渗水系数为0,防水效果好;同时,微表处的宽度变形率和车辙深度率较小,可用于路面早期压密性车辙填补(不宜用于结构性车辙填补),经过微表处罩面后能显著提高路面的高温抗变形能力,有效恢复路面平整度。
In order to evaluate the performance of water-based epoxy modified emulsified asphalt micro-surfacing, the modified epoxy emulsified asphalt was prepared by the first emulsification and then the optimum emulsified asphalt was determined by orthogonal experiment of three factors and three levels. Dosage and water-based epoxy resin content, and use it as a micro-surfacing material. The abrasion value and the amount of adhering sand of five groups of different whetstone micrographs were measured by 1 hour wet-wheel wear test (WTAT) and load wheel adhesion sand test (LWT), and the micrometer Department of the best ratio of oil and gas. Water resistance, anti-slip performance and waterproof performance of micro-surfacing were evaluated by 6dWTAT, swinging test and water seepage test respectively. It was concluded that water-based epoxy resin modified emulsified asphalt could be applied to rutting filling by rutting deformation test. Rutting filling test and overrun test to evaluate the anti-rut performance of micro-surfacing. The results show that the optimum water-oil ratio of emulsified asphalt modified with water-based epoxy resin is 65:35, the emulsifier content is 1.4%, the content of waterborne epoxy resin is 4% Good ratio of oil to stone is around 6.7%; the damage resistance of micro-surfacing water meets the technical requirement that the abrasion value is not more than 800g / m2, the skid resistance meets the technical requirement that the swing value is not less than 70BPN, which is higher than the technical requirement, Provide better friction; micro-watch after rolling survival water seepage coefficient of 0, waterproof effect is good; at the same time, the micro-watch at the width of the deformation rate and rutting depth rate is small, can be used for early compaction rutting pavement filling (Should not be used for structural rutting), after micro-surfacing over the surface can significantly improve the high temperature deformation resistance, effectively restore the road surface roughness.